Remember: Only female plants will produce buds. You can make sure to have female plants by using feminized seeds.
In weeks 4 to 6 of your cannabis flowering, the buds will get bigger and fatter. Once the flowers are showing as small white pistils (white wispy hairs), your plants will need more phosphor and potassium. Both are important for a good bud formation. The nutrients support flowering and fruiting.
Before spotting a marijuana flower, you will still want to support your plants in the growth stage as much as possible. Once the flowers are showing, you want to optimize for light and nutrients. Now you can, and should, switch to nutrients for the flowering stage.
In week 3 or 4, the first real buds will show instead of only hairy pistils. The growth of the plant will now slow down a lot – it’s important to watch out for the health of your plants at this point. A few dead leaves are normal (ex: if they do not get enough light). You do not want a major disease at this point so it’s also important to watch your nutrient levels and observe your plants closely to ensure nothing strange is happening.
Even though your plants love your powerful grow lights, make sure they do not get burned by high levels of light and heat. If you’re using a grow tent, be sure it has enough height for the lights to be at least 12-36 inches above the top of your plants’ canopy. If you’re using higher wattage lamps (1000W or similar), you should be at the top end of that range, and for lower wattage lamps (250W or similar) you can be at the low end of that range, but make sure you always have at least 12 inches.
If it hasn’t happened yet, your plants now might develop the known marijuana smell. Make sure to use a carbon-filtered airflow system. Your airflow system is important at this point and fresh air needs to be constantly flowing into your grow room. In this phase, your plants will need a lot of CO2 (carbon dioxide) for growth and health.
Be sure to get a good thermo-hygrometer, measure your grow room daily, and employ the use of a dehumidifier if you see your humidity start to creep up into a dangerous range. A standard 30-pint dehumidifier like this one will work for most setups from small grow tents up to a 500 square foot grow room. For bigger grow rooms (1000 square feet+), consider stepping up to a 70-pint dehumidifier like this one.
Nutrient burn could be a source of declining health of your plant. Make sure not to over-feed your plant with nutrients. You will notice that the tips of the leaves will seem burned if you over-feed your plants.
Finally! Buds with substance. White pistils will be sticking in all directions and the buds themselves will be bigger every day. Congratulations! You have come a long way and your plants are rewarding you. Here’s the best tips to follow during the flowering phase to get you here:
These flowering stage tips will take your cannabis production to the next level. It's the moment we've all been waiting for. Weeks in the making, now is the most important part of your plants' lifecycle. It's make-or-break for the success of your crop. Follow these simple steps to ensure you maximize your yields.