Air movement is the least expensive component of creating an ideal environment for your plants. Even a gentle breeze can help keep pests and microbes from landing on your plants, move oxygen and carbon dioxide around the leaves, and create a uniform environment throughout your room. One of the easiest ways to maintain sufficient air circulation is by hanging oscillating fans on the walls or ceiling/grow tent corners and placing a small box fan on the floor. The goal with air circulation should be to mimic a light breeze and avoid powerful gusts that may harm your plants.
Ultimately, the costs of equipment and recurring utility bills are more expensive than in outdoor and greenhouse settings. However, specialized indoor cultivation equipment allows cultivators to achieve multiple harvests per year and a more reproducible product. If you’re detail-oriented and technologically inclined, indoor gardening is a fun and rewarding pastime, or could even be a full-time job.
Rockwool , also known as mineral wool, is one of the most common forms of hydroponic media for the beginning stage of a plant’s life. Rockwool is an inert substance, and its composition of mineral or rock fibers provides a relatively sterile environment with a unique capacity to hold water. Rockwool will quickly expose any watering or feeding mistakes. Missing even one day of watering could be detrimental when using rockwool, especially for tender young plants.
Correct lighting is crucial, as it drives photosynthesis. In other words, your plants will not grow properly without proper lighting. Photo by: Gina Coleman/Weedmaps
Tips for success
CO2 can be supplemented into an indoor garden using compressed gas tanks or generators. Using compressed CO2 tanks is the most common method because they’re readily available, easy to set up, and do not add any extra heat to your room the way a CO2 generator does.
The intensity of light and its placement within your grow space are important aspects to consider when choosing what kind of light to grow with. Low light levels will slow photosynthesis, delay growth, and result in poor yields. If your light is too far away the plant will not receive enough of it and will grow spindly. If your light is too close it can damage the plant and ruin your colas.
Remember, not everyone was born with a green thumb or an affinity for setting up and maintaining equipment. But with practice, passion, and an attention to detail, you can ready yourself for an amazing growing experience that has the potential to change your views of and interaction with cannabis for good.
How to start growing weed
Metal-halide (MH) lights are a type of high-intensity discharge (HID) lights that work by igniting gas in a tube with a spark of electricity. Metal-halide bulbs emit a spectrum of light that is most beneficial during the vegetative phase. They emit more usable light for a plant than a fluorescent bulb does, but tend to cost substantially more.
When it comes to cultivating cannabis indoors, you need to be sure to provide your plant with the optimal temperature, humidity, air circulation, CO2, and nutrients.
As plants begin flowering, reduce the humidity in your indoor garden to 50 percent, enough to ensure that there is sufficient moisture during this intense stage of plant growth but not so much that you lose buds to mold. The simplest way to reduce humidity is through ventilation with outside air, which outside of tropical climates is closer to your ideal.
Tie the bent stems to thin bamboo sticks with twine to keep them in place—just remember not to cinch the ties so tightly that you cut off the circulation of vital fluids in the stem and branches. This low-stress training technique is more effective at increasing bud size and quantity than snipping off the top leaves (known as topping) as many growers do.
Plants are most vigorous when the temperature is 75 to 85 degrees Fahrenheit during the day (or when the lights are on inside) and 70 degrees Fahrenheit when it’s dark. In warmer conditions, plants tend to wilt. When it’s colder, plants are stressed and stop growing. Disruptions such as these diminish the plants’ energy for bud production.
6. Pump Up CO2
Carbon dioxide is the fuel for photosynthesis, the process that plants use to convert light into growth. The atmosphere has about 400 parts per million (ppm) of CO2, enough to sustain plants outside. In an enclosed indoor space, CO2 levels can drop as plants absorb it from the air, slowing their growth.
Take note, though, that these supplements are on the alkaline end of the pH scale and that at a pH above 7 (neutral), plants are less able to absorb phosphorus. When using bone-meal supplements, check the pH of your nutrient solution and, when needed, use natural acids to bring it down.
Humidity helps keep your plants hydrated, preventing the drought stress that can slow their growth. With water used constantly in indoor gardens, grow rooms tend to have high humidity, often as much as 80 percent. Too much humidity can lead to fungal diseases, including those that can turn your buds into a mildewy mess.
3. Train Your Plants
Phosphorus is the critical nutrient during the budding stage. Bone meal, a natural plant supplement, is loaded with phosphorus and calcium, which activates key growth-regulating hormones essential for flowering. Weekly doses of bone meal, starting just before budding begins, ensure that your plants have the phosphorus and calcium they need to bud abundantly.
Compact fluorescent and LED bulbs produce enough light for plants to grow and even to flower, but high-pressure sodium (HPS) fixtures provide the most light in the spectrum that plants need during their budding stage. HPS lights can get hot, so you need a well-ventilated room to use them.
Some growers believe it's better to give marijuana plants 18 hours of light a day max, with a 6 hour dark period during the vegetative stage.
In the vegetative stage, it is important that you give your plants the right nutrients needed to get optimal growth.
3.) Give Plants 24 Hours of Light per Day During the Vegetative Stage
Many factors will affect the total time, but the average grow takes 3-4 months. Learn more about the marijuana growth timeline.
If you want to initiate flowering early, it's better to do so after after waiting just a bit, so you grow plants that are relatively small but can produce more than a couple of grams worth of bud. This is known as the "Sea of Green" (SoG) technique. A bunch of smaller plants is easy for new growers to manage, plus it gives you the option of trying different strains instead of getting of lot of one strain.
6.) Pay Attention To Your Plants and Quickly React to Problems
Faster is not always better, but there are ways that you can speed up the time from seedling to harvest without sacrificing quality, potency or yields.