While the first two cotyledons (seed leaves) are being formed, the plant shrugs off the protective seed husk. That signifies the end of the germination stage.
Now the plant starts its main growing phase. Provided it receives enough light, it can grow up to two inches (5 cm) in a single day. It is obvious that the plant needs to be repotted if it is still growing in a small pot.
Cannabis is an annual plant, so its entire lifecycle takes place within a single year, with most varieties reaching the end of their life after between four and ten months. In general terms, the following four stages of life can be distinguished:
As it grows, the plant also needs more water. Young plants are best watered close to their stem, but later on water should be distributed more widely so that the tips of the roots can absorb water more efficiently.
How long the seedling stage lasts depends on the variety and on the environmental conditions. The main focus of the plant is on developing a root system. This forms the foundation for its later growth.
The growth of a cannabis plant can be divided into 5 main chapters: germination, seedling, vegetative, flowering, and finally, budding. Within these stages of growth, many changes occur to the plant that should be noted and carefully watched for by the grower. Here, we’re going to dive into these different stages, to give you an idea of how long things generally take and what to keep an eye out for during cannabis growth.
There will be a ton of foliage at this point and the plants will want more water than seems possible. Any training should be done at this stage, as long as the plant is healthy and growing rapidly.
Chapter 1: Germination
The seed should be hard, dry and darker brown to grey before being used. Younger seeds won’t “pop” as readily. It can take up to a week to 10 days for the plant to finally emerge from its seed, but once it finally does it is ready to be transferred into a more permanent location.
The rest of the growth is up to the plant, but when it seems to be getting close to harvest time flushing nutrients is important for quality tasting harvest. Simply flush the plants with pH-balanced water and stop administering nutrients at this time to ensure a good harvest.
The growth of the plant will begin to slow down here as well, eventually stopping altogether as the plant’s energy will be focused entirely on the buds.
This one is a little bit hard to watch as this Purple Haze seedling is hit by a strong insecticide (Doktor Doom) around 0:31 to combat spider mites.
In this video, a young marijuana plant is topped and you can watch as the two growth tips from the top node (quick picture cheat sheet explaining nodes & growth tips) turn into the two new main colas.
Recovery of Topped Marijuana Plant & Formation of 2 New Colas
This time-lapse video spans 7 days
This time-lapse video spans 2 weeks, a frame was taken every 6 minutes. 30 fps.
A huge thanks to fuzzygrow for contributing these uniquely valuable time-lapse videos to the marijuana growing community!