Week 5. In week 5 of flowering, you can observe the buds all over your plant becoming thicker. You may also spot new buds growing in new places such as along the main cola. With buds abounding, your cannabis plants will get fatter every day.
It's normal for some of the bottom leaves to begin to turn yellow as the plant continues to put its energy in the leaves and buds getting the most direct light, though the plant should still be mostly green from top to bottom even in week 6-8.
Yes you should – but with the correct technique. A proper thinning will remove 20-40% of the mid to upper foliage every 5-7 days. Removing these fan leaves opens up light and produces better air exchange to the lower canopy.
You can remove fan leaves during flowering in much the same way you do during veg. Prune away large leaves that are overshadowing bud sites, as well as dead or dying fan leaves. One thing to keep in mind is that you should prune in intervals, giving at least a couple weeks between each session.
The biggest changes that you will witness in the sixth week of flowering is the amount of weight that has been added to the buds. Your buds in Week 6 will be noticeably bigger than they were in Week 5. At this point, these plants are deep into flower, and are really maturing day by day.
Cannabis plants need short days (or more specifically long nights) in order to start flowering and make buds. Most indoor growers give their plants 12 hours of darkness and 12 hours of light each day to initiate budding and continue with that 12/12 light schedule until it's time to harvest.
In weeks 6-8, the buds of your plants will begin to harden; the delicate trichome heads of your flowers will cloud and turn amber, and the once milky pistils of your buds will shrink, turn brown and become fragile. Also, as your plants continue to ripen, new aromas, flavors, and pigmentation will develop.
Trichomes become more prominent during the third or fourth week of the flowering stage of your plants. At this phase, you should have already started inducing the needed nutrients that your plants need to improve trichome production and effectiveness.
A good rule of thumb is to take note of the length of your main colas after the switch to 12/12 (from a previous grow), then try to initiate flowering with your new plants when they're about that height. So, if your main colas end up around 12″ long, initiate flowering when the plant is 12″ tall, etc.
To some degree, more light translates to fatter buds and higher yields (you'll need to pay attention to the distance between your grow light and plants or your plant may suffer from light burn). Increasing light intensity is the most effective way to fatten up buds.
During the pre-flowering and early flowering stage, the plants don't require additional watering. However, once the plants enter the peak flowering stage, the buds start sucking the soil dry. The buds are filled with water; it's logical that more watering is required.
You don't want to use liquid nutrients every time you water—use them every other watering, or two waterings on, one off. It depends on the complexity of your soil and the health of your plants. Too many nutrients will damage your plants. Giving weed plants the proper amount of nutrients requires careful monitoring.
In week 5 of flowering, you can observe the buds all over your plant becoming thicker. You may also spot new buds growing in new places such as along the main cola. With buds abounding, your cannabis plants will get fatter every day. This is a surefire sign you are in full flowering mode.
The biggest changes that you will witness in the seventh week of flowering is the amount of trichome production on the buds. Your buds in Week 7 will be noticeably frostier, as the plants begin to finish out. These plants are beginning to look smokable!
Flowering week 7 and 8. Ripening is the most difficult phase. The buds need to ripen at this point in order to be harvested at the best possible moment. The buds are still getting bigger, but not as quickly as in the previous phase.
Removing the leaves can improve light penetration, allowing lower buds to develop properly and resulting in better yields. Cutting off the foliage on the lower branches will improve airflow, helping prevent mold and bugs. Removing fan leaves can redirect a plant's energy to the buds, resulting in better quality buds.
Stop Watering 1-3 Days Before Harvest – After flushing, in the final days of harvest, you can further stress your plants by stopping watering. You want to allow the plant to start to wilt just a small amount, because then the plant “thinks” it is dying and as a last-ditch effort, it will increase resin development.
Trimming at home begins a few weeks before harvest when the larger leaves are removed. Usually, growers trim the fan leaves weeks before harvest, which is a period that leads to senescence, a phase in the plant cycle when the larger leaves start fading away.