How Long Does It Take to Grow Weed Indoors? [3 to 5 months] This is one of the most common questions we receive from curious soon-to-be indoor cannabis growers: How long does it really take to It typically takes between 3-4 months to grow weed. Let’s take a look at the question of how long does it take to grow weed and the time needed for each step. Good weed comes to those who wait. But just how many months do you need to grow cannabis, and when can you harvest your first yield?
How Long Does It Take to Grow Weed Indoors? [3 to 5 months]
This is one of the most common questions we receive from curious soon-to-be indoor cannabis growers: How long does it really take to grow weed? What’s the growing timeline?
It’s actually a really good question! Every new marijuana grower should know how much work they’re signing up for! The short answer is…
The Average Indoor Cannabis Grow Takes 3-5 Months
The long answer is: from Day 1 of your weed plant’s life to actually smoking your harvest, it can take… 8 weeks – 7+ Months! That’s a huge range, right?
That’s why most cannabis growers won’t give you a straight answer. The truth is, there are many factors will affect the total time until you have ‘ready’ buds, by days, weeks or even months. This includes your strain, your setup, and how big you plan to grow your plants (bigger plants need more time!). So instead of giving you a huge range, an easier-to-swallow answer might be to say that the average grow takes 3-5 months for indoor growers.
This includes the time needed to grow your cannabis plant from seedling to harvest plus an additional 2 weeks (or more) which is used to cure your cannabis buds after harvest (making them more potent and better smelling).
Additionally, for at least the first time you grow, you also need to consider the time needed to get your equipment and seeds/clones.
This article will give you the total time breakdown, so you can plan out the details of your grow in order to achieve the harvest times you desire:
Ultimately, How Long to Harvest Marijuana Depends on the Desired Yields, Strain and Grow Style
Today I will show you how to plan your grow so it takes the amount of time you want!
Note: When growing cannabis indoors, it takes 3-5 months on average to go through the life cycle of a plant. When growing outdoors, the total time depends on your local climate as most strains are ready to harvest in mid-to-late Autumn.
Jump to the Section of the Tutorial You’re Interested in:
- Before You Start Growing Weed– Get seeds and supplies so you’re set to start growing!
- Time Needed to Grow Weed, From Seedling to Harvest
- Germinate Your Seeds (1-7 days) – Learn about fail-proof methods to germinate perfectly in soil/coco or hydro.
- Vegetative Stage (average 4-8 weeks, length based on desired plant size) – In the vegetative stage, the cannabis plants are growing just stems and leaves. On average, most indoor growers vegetate their plants for 4-8 weeks. Seedlings are able to start flowering as early as 3 weeks from germination, but the resulting plants will be tiny. Most growers choose to let plants vegetate for longer because giving them more time to grow results in bigger plants, which tend to produce bigger yields as long as you have enough light to cover all the bud sites. That being said, you can still produce quite a bit of bud with a lot of small plants growing at once as long as you fill up your grow space.
- Flowering Stage (average 8-10 weeks, depends on strain) – This is when plants start making buds. The length of the flowering stage depends heavily on the strain/genetics, with an average of about 8-10 weeks for most strains. Some strains are bred to have very short flowering stages (for example, most auto-flowering strains will naturally start flowering at around 3 weeks old and some are ready to harvest just 5 weeks later, for a total of only 8 weeks from seed!). Other strains take months in the flowering stage before they’re ready to harvest. Typically, longer-flowering strains produce higher yields and short-flowering ones tend to produce lower yields. Buds that are exposed to more light-hours have more time to fatten up, though that’s not always the case.
- Post-Harvest (This is when the smell/taste/look you love shows up) (1-2+ weeks) – After buds are harvested, they are dried for about a week then placed in glass jars to “cure” for 2+ weeks in order to achieve the best quality. This post-harvest processing dramatically improves the taste, smell and the perceived potency of the buds. It also reduces the chance of buds causing headaches or unpleasant “speedy” effects. Don’t skip this step! It will account for nearly 50% of your final bud quality! Learn how to dry & cure your buds to perfection.
If you choose the right strain, you could be smoking your own buds as soon as 3 months from germination!
Before You Start Growing Weed
Total preparation time needed: Up to a few weeks
Here’s the breakdown…
Get equipment: 0 days – 2 weeks
This includes purchasing your equipment and/or waiting for it to show up in the mail. This goes much quicker if you buy everything locally, for example at a hydroponics shop. Once you have your marijuana growing supplies, you’ll need to setup your growing area and equipment. A standard setup should take an afternoon at most. Depending on how you purchase your equipment and how quickly you setup, you could be ready the same day or in two weeks (after factoring in shipping time).
Check out examples of new grower shopping lists to learn exactly which supplies you’ll need.
Get seeds or clones: 0-4 weeks:
If you’ve found seeds in your bud or have instant access to genetics (like knowing a grower or buying seeds/clones locally), you’re already good to go. If you order from a seed bank overseas (especially US residents), expect to wait 1-4+ weeks to get seeds. Shipping time depends on the shipper and how fast the mail gets delivered. Sometimes seeds get caught up in customs for weeks. Make sure to always order from a trustworthy vendor.
Time Needed to Grow Weed, From Seedling to Harvest
Total growing time needed: 3-5 months on average
Here’s the breakdown…
Germinate your seeds: 1 – 7 days
Seedlings can sprout in as little as a day, but by 3-5 days, they should be good to go. If you have access to clones, you get to skip this wait.
Learn my fail-proof method to germinate your seeds in soil/coco or hydro.
Vegetative Stage: 4-8 week average (but if you want big plants it may take longer)
The length of this stage is a matter of personal preference. Most cannabis plants won’t start flowering until they’re at least 3 or 4 weeks from germination, but after that you get to choose how long your plant spends in this stage (except auto-flowering strains, which automatically start flowering in 3-4 weeks from seed). Except for auto-flowering strains, you have total control over the vegetative stage because you’re the one to ‘flip the switch’ and get your plant to enter the next life stage: flowering.
When you start with a seed, even with an auto-flowering plant, you will always have at least 3-4 weeks of vegetative growth before any buds start forming no matter what you do. Growers generally allow their plants to stay in the vegetative stage from a few weeks to a few months.
The size your plant achieves in the vegetative stage has a very large effect on your final yields since bigger plants produce more bud sites than smaller plants. However, you need enough light to cover all the bud sites or they will never develop properly. Light is like food for bud growth!
These vegetating plants are about 4 weeks old from germination
To give you an idea as to what your FINAL marijuana plant may look like depending on how long it spends in the vegetative stage…
This plant didn’t spend any time in the Vegetative Stage. It was given 12-12 lighting almost immediately after sprouting. It’s so small that it spent its whole life in a solo cup, and its only light came from CFLs. I weighed down the bottom of the cup so it didn’t fall over. It ended up yielding about 0.75 oz.
These auto-flowering plants spent about 3 weeks in the vegetative stage before they automatically started flowering, and were ready to harvest just 5 weeks later. They were about a foot tall at harvest and yielded approximately 2 ounces each. Read the step-by-step tutorial to grow plants exactly like this.
This marijuana plant spent about 6 weeks in the vegetative stage before being changed over to flowering and yielded just over 6 ounces at harvest. View the complete grow journal with instructions on how to grow your plant so it looks just like this at harvest!
These cannabis plants were vegetated for about 8 weeks before being flipped to the flowering stage. Although they were grown in the exact same conditions from seed to harvest, their final heights are remarkably different because their strains had vastly different genetics. The smaller plant produced 6.6 ounces, while the big plant produced 9.3 ounces. Strain can make a big difference! Learn about growing different strains together.
These cannabis plants were vegetated for about 9 weeks before being flipped, in the exact same setup as above, and produced over 10 ounces each. Besides an extra week of veg, the biggest difference between this grow and the one above was simply the strains.
This human-sized plant (one of my very first plants) spent a little more than 3 months in the vegetative stage before I realized I needed to turn it over to the flowering stage. It then spent another 12 weeks in the flowering stage before it was ready to harvest because it was a long-flowering strain. It got way too tall for its space (taller than me!) and started falling over. However, despite the huge size and more than 5 months of growth, it only ended up yielding about 6 ounces. This is because it was under weak CFL grow lights. Though there were a lot of buds, the lack of strong light made them airy, without a lot of weight. Click the picture for a close-up.
Some people put their seedlings or clones right into the flowering stage if they want to harvest quickly though this makes for extremely small plants. For example, super-stealth growers who are growing in small hidden spaces – like out of a computer case – would want to put their seedlings into flowering nearly right away to keep their plants as small as possible. It’s also important to remember that container size and grow lights make a big difference. Small containers constrain the roots and keep plants from getting as big as they could, and small lights prevent buds from fattening up as much as they could.
I personally recommend at least 4 weeks in the vegetative stage with 18+ hours of light each day for the best results. Plants that are forced to start flowering sooner than 4 weeks don’t yield much compared to how much work you put in. That being said, keeping plants relatively small does have some benefits!
A good rule of thumb…
Your plant will likely double in size (maybe a bit less, maybe more) from when you first put it into the flowering stage; this is known as the Flowering Stretch. So make sure you end the vegetative stage before your plant reaches half the final height you want, or your cannabis plants may outgrow your grow space during the flowering stage!
Flowering Stage: (average 8-10 weeks, length depends on the strain/genetics)
Here’s the breakdown…
- Week 1-3 – Transition to Flowering
- Week 3-4 – “Budlets” Form
- Week 4-6 – Buds Start Fattening Up
- Week 6-8 – Buds Ripen, Pistils Darken – some strains spend longer in this stage
- Week 8-12+ – Flowering Ends, Harvest time!
The length of time needed to stay in the flowering stage depends heavily on the strain. Once you have switched your plant into the flowering stage they will stretch (the ‘flowering stretch’), form buds and then fatten.
Here’s a list of some of my favorite and best cannabis strains by the length of the flowering period:
Short (6-8 weeks)
– Known for being especially easy to grow – High-yielding, medical, high-CBD, medium-THC strain – Based on the famous White Widow strain but with a much faster finish – This version of Blue Cheese is fast flowering and easy to grow, yet buds are extra potent and produce great effects – One of the best strains for outdoor growing (and buds may turn pink or bright purple!) – A gem by Barney’s Farm, this strain “lifts you up” and causes a strong “head high” that can be a great way to relax after a tough day, or for when you want to get in a creative mood. – One of the most potent auto-flowering strains I’ve grown so far, ready in about 10 weeks from germination (7-week flowering stage) and just overall a healthy, easy, and high-yielding plant.
- In fact, if you’re interested in a very short flowering time, most auto-flowering strains are ready to harvest less than 3 months from seed.
Frisian Dew plant growing outdoors with deep purple buds
Medium (8-12 weeks)
– I just finished a grow with this strain and it impressed me. The buds did not turn purple but the smell, yields, and potency of buds were outstanding. – Medical strain, has a THC:CBD ratio of 1:1 – An award-winning strain that’s fruity, vigorous, and potent. The yields are not necessarily the highest, but it’s worth it for the quality of buds. I’ve grown this strain in many different setups and buds always come out great. – An award-winning strain that’s curiously strong. It’s one of the few “haze” cannabis strains that doesn’t take forever to finish flowering. – A cross between Gelato and OG Kush; two extremely popular strains in the US on the west coast. Finishes on the faster side, yet still produces great yields, potency, and smell. – Another beautiful Gelato cross, this time with the famous Gelato 33 clone (a very specific cut of Gelato), with Wedding Cake. – Another west coast favorite, this produces beautiful buds that are covered in crystals/trichomes, also high yielding. – Yields were so-so yet buds produce powerful effects. It turned a bit purple when I grew this strain (pictured below in the middle), which was a delightful surprise, but the potency is what I remember. – Easy to grow. Wants higher levels of nutrients in the flowering stage but rewards you with big yields, a strong spicy smell, and great potency.
Long: (12-14+ weeks)
- Many Haze strains, as well as some Sativa strains, and generally any strains that originated near the equator. – A cross between some of the best Haze strains in Southeast Asia. If you want to try something different that is almost impossible to find in the US or Europe, this is it. It produces psychedelic effects that defy its cannabinoid content. May be too intense for some people.
In general, most strains (besides auto-flowering strains) are in the medium range as far as how long they take to flower.
It’s not exact – There’s a 2-3 week harvest window for most plants, and keeping your plants in the flowering stage for a bit longer tends to increase your yields. This is because the plants tend to really bulk up their flowers once they’ve become ‘ripe’.
So often times, even though you could harvest at the shortest recommended time, waiting an extra week or two will give you 10-30% more yield compared to harvesting as early as possible.
Utopia Haze is a mix of Brazilian landrace strains
Post-Harvest (before you smoke you should do this stuff too)
Total post-harvest time needed: 2.5 weeks – 1.5+ months
Drying: 4 – 10 days
Good marijuana buds can be dried in as little as 4 days, but ideally, drying should be a slow process taking up to a week or more. Making sure your plants have been thoroughly dried (but not over-dried) will lower chances of mold during the curing process.
Curing: 2 weeks – 1+ months
Curing really seems to make the effects of buds feel less ‘speedy’ and be better suited to medical applications like treating anxiety, reducing pain, and improving feelings of depression.
Additionally, curing gets rid of any ‘cut grass’ smell, harsh taste and other undesirable traits of some freshly dried buds. Over time with proper curing, those traits will be replaced by the ‘real’ smell and potency profile of your buds.
Two weeks is considered the minimum time to cure your buds, but I personally cure all my buds for a month or even a bit longer because the buds continue to improve for several more weeks.
So, after you’ve bought seeds and equipment, grown a plant from seed to harvest, trimmed, dried and cured your buds, that brings us back to the original answer…
Total Time to Grow (and Be Ready to Use) Your Own Weed:
8 weeks – 5+ Months
Average Time to Grow (and Be Ready to Use) Your Own Weed:
3 – 5 months
If you haven’t started growing your own weed yet, today is the day!
New Grower Shopping Lists – What You Need to Get Started
How to Grow a Pound of Cannabis – Step-by-Step Instructions from Seed to Harvest
7 Tips for Growing Top-Shelf Buds – How to Grow Better Cannabis than the Dispensary!
How Long Does It Take To Grow Weed?
How long does it take to grow weed is a very commonly asked question. Usually it takes about 3-4 months to grow the average cannabis plant – but with the right tools and strategy, you can grow the weed plant you want in as little as 8 weeks. Let’s take a look at the question of how long does it take to grow weed and the time needed for each step.
How Long Does it Take to Grow Weed – Growing Timeline
The timeline below lays out a seven-stage process of a typical grow schedule. If you’ve been searching online for “how long does it take to grow weed?” you’ve likely run into a range of time periods. Generally, a marijuana plant can take 14 to 32 weeks to grow, which translates into about four to eight months to grow. This is for growing a marijuana plant from seed.
The length of time it takes to grow a weed plant can be broken down into multiple phases from seed to harvest:
- Getting your equipment (1 day to 2 weeks)
- Getting your clones or seeds (1 day to 4 weeks) (12 hours to 8 days)
- Seedling phase (1 to 4 weeks)
- Vegetative phase (2 weeks to 6 months)
- Flowering phase (6 weeks to 3 months)
- Harvesting phase (1 to 3 days)
Step 1: Getting your weed growing equipment = 1 day to 2 weeks
If you know what you are looking for then this could happen quickly. We will help you with this later on as we set up the grow-rooms and do some grows with different styles and grow mediums.
Step 2: Getting your clones or seeds = 1 day to 4 weeks
Getting clones (cuttings from healthy mother plants) is easy to do in areas that allow cannabis cultivation. But in states or countries where it is illegal to grow, obtaining healthy clones can be a challenge. Seeds, on the other hand, can be ordered on the internet and generally take 2 to 4 weeks before they arrive by mail.
Step 3: Germinate The Seeds = 12 hours to 8 days
If starting with clones this can be skipped. The average time to germinate is 2 or 3 days. Make sure to check your seeds every day because seedlings can sprout in as little as one day. You’ll know your seed has germinated when your seed has popped and displays a tap root formation.
Check out our guide on the best method to germinate marijuana seeds using paper towels and water.
Step 4: Seedling Phase = 1 week to 4 weeks
Once again, can be avoided if using clones and not seeds. As your cotyledons begin to take shape, so will your cannabis leaves in a single leaflet form. Generally, growers can give their seedling a light amount of nutrients after the third set of leaves begins to appear.
Step 5: Vegetative Phase = 2 weeks to 6 Months!
Yes, that is correct. This stage in the plants life has a huge fluctuation in how long it needs to take. You, as the grower, hold all the power and get to choose how long this phase is. Once you change the light cycle that the plant receives to 12 hours of light, and 12 hours of darkness per day, the plants will switch to the next phase, which is flowering.
If you want to, you can switch the lights to 12/12 right away and force your plants to flower! The sooner you change to 12/12, the faster your plants will flower, and the sooner you can move on to the next crop. But, keep in mind, the less amount of time you keep your plants in the vegetative phase, meaning getting at least 18 hours of light per day, the smaller your plants will be, and the less marijuana you will have to use.
If you are concerned with how big your plants will grow, maybe because you only have a small space to grow in, you can grow cannabis that only grows only a few inches tall, and you could even grow it the entire time in a little plastic cup if you wanted to!
Keep in mind that buds do not form for at least 2 to 3 weeks in the vegetative phase when beginning with seeds. Most growers allow their plants to stay in the vegetative stage from a few weeks to a few months so they get big enough and will end up with a sizable harvest. Bigger plants produce more buds!
But, many growers choose instead to grow small plants and to harvest more often with smaller yields each time. We recommend at least 3 weeks or more in the vegetative stage with at least 18+ hours of light each day for optimal yields. Even 24 hours of light per day is sometimes better, with certain strains.
The more light, the more buds!
Keep in mind that cannabis plants usually double in size from vegetative phase to when they are done flowering. This means it’s sometimes best to change to 12 hours of light and 12 hours of darkness once the plants are one-half the size that you feel your grow room has adequate space for.
During the vegetative phase, you can use a number of cultivation training techniques such as super cropping, crimping, topping, tying, bending, sea of green (SOG), screen of green (SCROG), and trellising to alter the growth, direction, height, and quality of your crop.
Autoflowering strains, however, have a different vegetative time period than regular feminized seedlings. Autoflowering strains will have at least two to three weeks of vegetative growth before they automatically start showing any bud formations regardless of photoperiod.
Step 6: Flowering Phase = 6 weeks to 3 months
In nature, cannabis plants start to flower in the fall months, when they are receiving less light. The decrease in light signifies to the plants they are nearing the end of their life cycle and its time to begin flowering.
How long does it take to grow cannabis?
Good weed comes to those who wait. But just how many months do you need to grow cannabis indoors?
The average time for most indoor cannabis plants is roughly four months, but that could fluctuate depending on dozens of factors.
While it’s tough to say when your cannabis strain will mature, you could get a general timeline by reviewing marijuana’s primary stages of development. New growers should get comfortable with these phases to monitor their plant’s progress and schedule their time.
From germination to recreation: the average life cycle of cannabis plants
Traditionally, cultivators recognize four distinct phases in a cannabis plant’s life cycle before harvesting:
- germination: 1-14 days
- seedling: 2-3 weeks
- vegetation: 2-8 weeks
- flowering: 8-10 weeks
You could, however, eliminate the germination and seedling phases if you start with clones rather than seeds. In this overview, we’ll assume you’re beginning with a batch of healthy, feminized seeds.
It also assumes that the seed you have chosen is photoperiod sensitive, meaning that it’s flowering cycle is driven by how much light the plant is exposed to.
1. Germination phase: get your seeds going
You could plant cannabis seeds directly in soil, but most cultivators prefer coaxing out taproots before putting seeds in their growing medium.
Establishing these first roots gives cannabis seeds extra strength during the delicate seedling phase. It also allows growers to “weed out” any weak seeds beforehand rather than wondering whether they’d take root in soil.
The simplest way to jump-start germination is to wrap seeds in a slightly damp paper towel and cover them with a plate. You could also place seeds in a glass of purified water. The important thing is to keep these seeds far from light.
You also should take extra care to avoid contaminating seeds with your fingers. Some cannabis cultivators use tweezers to avoid any unintentional cross-contamination.
Usually, you’ll see white roots sticking out of your seeds in less than one week. There are some rare cases where it could take longer than two weeks, but you probably shouldn’t wait any longer than 14 days.
Monitor your seeds every day for signs of progress, and place them in starter pods once they show signs of development.
2. Seedling phase: growing baby buds
Seedlings should be ready to transplant into your main soil pot after two to three weeks (Shutterstock)
As your cannabis seedlings first reach for life, they will be incredibly fragile. During this early stage, you must use gentle lighting like a dimmed LED or a CFL bulb for 16 hours per day. 1
You should also only mist your cannabis seedlings with pH-corrected water.
Initially, seedlings will have tiny rounded leaves called cotyledons. However, as your plant grows, you should notice the true “cannabis” fan leaves emerge. Generally, people know they’ve transitioned from seedling to vegetation by the number of leaves on their plants.
When you see about four sets of about five fan leaves, your plant should be strong enough to transition to a larger pot. Typically, your seedlings should be ready to transplant into your main soil pot after two to three weeks.
3. Vegetation phase: time to flourish
The vegetation phase is all about growth. During this stage, your plants will rapidly reach upward and grow many stems and fan leaves. To help fuel this growth, vegetative plants need extra nitrogen in their feeding schedules. 2
Arguably, lighting is the most consequential element during vegetation. Since cannabis is a photoperiod plant, it will transition to flowering when you limit the daily amount of light. 3
Interestingly, you could transition from vegetative to flowering any time you want. There’s even a training technique called Sea of Green that takes advantage of this biological feature.
The downside of transitioning out of vegetation early is you’ll have fewer buds. By giving the cannabis plant plenty of time to grow, you’ll enjoy more bud sites, and thus a higher return. If you learn training techniques like bending or topping, you’ll increase your total yield even further.
To keep your strains in vegetation, you need to maintain a light schedule of at least 18 hours on. You could keep this going for as long as you want, but most strains are ready to switch after four to eight weeks. It all depends on how strong your flowers are growing, what strain you’re using, and what kind of yield you want.
4. Flowering phase: see the ‘fruits’ of your labor
In preparation to begin producing flowers, cannabis plants can double their size during early flowering (Shutterstock)
To transition from vegetation to flowering, you need to flip your light schedule from 18/6 to 12/12. The shortening of daylight hours mimics the natural seasonal change from summer to fall and triggers major changes in the plant’s hormones. 4
This causes the plant to shift its focus from growth and development of roots and shoots to the production of pistils as the female plant awaits pollination, which in nature would result in the eventual production of seeds before the plant dies during the winter.
Monitoring flowering plants is similar to vegetation, but you’ll need to transition to flowering nutrients and slightly lower your ambient temperature (~ mid-70s F). You also have to be extra vigilant for signs of mold or hermaphroditism during flowering.
You can determine the sex of a cannabis plant during flowering by looking at the nodes. Male plants have ball-shaped pollen sacs, while females have thin pistil-like strands. If you have a hermaphrodite, it will have both of these features, which means the pollen could disrupt bud production.
The length of the flowering stage largely depends on your strain’s average grow time. The only way to know when to harvest buds is to monitor their size and the color of their trichomes.
For most strains, it takes eight weeks to go through flowering, but it could easily last an additional two or three weeks with sativa strains.
It’s also important to consider that even though this stage is called flowering, that doesn’t mean the plants will solely concentrate on making buds. In preparation to begin producing flowers, plants can double their size during early flowering, so plan your grow space accordingly.
When’s a good time to harvest cannabis?
There’s no set time you should harvest buds from a flowering plant. Instead, you have to rely on your sense of sight to choose when’s a good time to clip your nugs.
Using a high-quality magnifying glass or a jeweler’s loupe, take a close look at the trichomes on each of your buds. Cultivators usually want most of these trichomes to have a milky-white, opaque appearance.
Clear trichomes are too young, and they will have minimal THC concentration. On the opposite extreme, orange-haired trichomes contain an oxidized form of THC known as CBN. 5 While some people enjoy CBN’s supposedly sedating effects, most prefer to clip their nugs when most trichomes are milk-white.
Want professional-quality cannabis? You’ll need patience!
Cultivators could use a few tricks to speed up the growing process, but most feminized seeds will take roughly four months to reach maturity. If you’re an impatient cultivator, you could opt for feminized autoflowering seeds, but remember these cultivars have a lower overall yield and often lower cannabinoid production.
For those not keen on the tradeoffs associated with autoflowers, consider starting with clones or focusing on indica strains to shave off significant time from your schedule. On average, indicas reach full-flowering weeks before sativa strains.
As a final tip, growers should research their preferred cannabis strains in online growing forums. Each hybrid has a unique growing pattern, and there’s a wealth of strain-specific information now available online. Knowing the estimated time for your cultivar is the best way to get an accurate read on how long it will take to grow cannabis.