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how to grow autoflowering marijuana indoors

How to grow autoflowering marijuana indoors

This guide outlines everything you need to know about autoflowering cannabis seeds. This includes tips on growing them, pros and cons, and five of the best strains on the market.

Your Exclusive Autoflower Grow Guide

It is relatively easy to buy autoflowering seeds online. There is an increasing number of reputable websites that sell them. Alternatively, you can find them in a local dispensary, but purchasing the best autoflower seeds is a challenge at first.

1 – Amnesia Haze Auto

As the name suggests, autoflowering marijuana strains flower automatically rather than waiting for a specific light cycle. These plants produce buds when they are ready, which means there is no reason to mess with your lighting.

How to grow autoflowering marijuana indoors

The size of an autoflower can be influenced by several factors, genetics being the main one. More modern autoflower breeders breed their genetics to contain as little as Ruderalis genetics as possible, focusing on the more appealing characteristics such as size, structure, potency, and yields.

In general, autoflowers stay for 4 weeks in the vegetative stage, so about 4 weeks. Then your auto will start developing flowers for 3 weeks, and fattening up the buds for the last 3 weeks.

A dry pot will be easy to lift whereas container with lots of water will be heavy. The trick is to not let the soil go too dry or too wet, so water the plants only when the pot isn’t too heavy or light.

If you’re wondering what the term “N-P-K” printed on fertilizer bags means, it’s nothing but Nitrogen-Phosphorous-Potassium. The plants also need other micronutrients along with calcium and magnesium, so it’s extremely important to get the dosage right.

PH levels

Please don’t stuff seeds in plastic containers that make life hell for the poor roots. Use porous containers such as fabric pots or even Airpots to help the plants grow as much as possible. Autoflowers are typically small, but they need containers that are at least 5-8 liters in size.

If you don’t want to bother about fertilizing at all, you can even try growing autoflowers organically. There are various ways to make your own organic soil, but you can buy some in your local store to start with. Organic soil is premised with nutrients, so it’s ideal for someone that doesn’t have a lot of time. For growers that don’t mind putting in the efforts, composting and building super soil is the best soil mix for autoflowers.

Sometimes, it just so happens that the plant refuses to respond even if you’ve done everything. In such cases, flush the plants with lots of water (at least double or triple the size of the container) to reduce any nutrient or salt buildup so that the plants can breathe again. Flushing is typically done at the end, but it doesn’t hurt the plant even if you do it in between because it reduces buildups to a good extent.

9. Harvest at the right time

Most autoflowers reach a height of around 50-100cm but a plant’s size depends on the genetics and growing conditions. Also, all strains are different so you will find Sativa and Indica-leaning autos; Most Indica hybrid autoflowers will stay around the 80-120cm mark but Sativa-dominant autoflowers can reach up to 175cm tall.

To set things straight, let’s begin by saying that autoflowers are really easy to grow. In fact, beginners can try growing autoflowers with little to no experience as long as they understand the basics 1 .

How to grow autoflowering marijuana indoors

When growing auto-flowering plants outdoors, you don’t need to worry about light schedules. You just need to ensure your plant will have 3 months of warm weather (above 60°F) and your climate is likely suitable to grow auto-flowering plants. These auto-flowering plants were ready to harvest before summer was even over:


Auto-flowering pic by Vapo69

Total dry weight for the 4 plants was 145g plus about 25g popcorn so around 6 oz in total.