Choosing the right pot is an essential part of caring for your growing plant. You need a pot that’s going to give the root system space to grow, but not so much space that the roots won’t be able to absorb all the water in the soil. You should also make sure the pot has drainage holes to get rid of any excess water that could overwhelm the plant.
As the plant grows, it starts to produce more fan leaves — and those leaves continue to develop the ridged edges that you’ll immediately recognize as the marijuana plant. As more leaves grow, more ridged edges develop until finally, the plant is fully grown with each leaf reaching its maximum number of edges (which can be anywhere from 5 ridges per leaf to upwards of 10).
Be mindful of how much you water your cannabis seedlings
Let’s take a deep dive into how to care for your baby marijuana plant so you know exactly how to take care of your growing seedling and make sure it grows into a healthy, mature cannabis plant.
You should also aim to keep humidity in the grow environment at a higher level, typically around 70 percent. That way, the plants can absorb moisture from the environment to develop stronger roots without getting weighed down by over-watering.
Some red flags that signal your seedling may have a deficiency in nutrients (or nutrient toxicity) include:
We can’t stress enough that the timeframes in the above graphic are ranges of time for the Northern Hemisphere. You’ll need to adjust them based on your specific region and local weather and climate.
If you buy a clone from a grower or breeder it will be a seedling, so you can skip the seed germination phase.
Important dates for growing marijuana outdoors
At this stage, the plant is vulnerable to disease and mold. Keep its environment clean and monitor excess moisture. Be sure to give it plenty of light.
The Spring Equinox is a good reminder that it’s time to kick off the outdoor growing process and start germinating your seeds.
Once your seed has germinated, or sprouted, it’s ready to be placed in a growing medium, like soil. The tap root will drive down while the stem of the seedling will grow upward.
Once the plant is growing fast, you can start watering as normal (water until 20% runoff comes out the bottom, then don’t water again until the top inch is dry to the touch). At this point your plant will be drinking more and will have a stronger root system to seek out both the water and the oxygen it needs.
Symptoms: seedling is droopy, growing medium is moist, damping off
Before we take a look at cannabis seedling problems and common beginner mistakes, let's show you what healthy cannabis seedlings and young plants look like! If your plants look like this, you're golden!
Now that you know what healthy young cannabis plants look like; let's take a look at some common seedling problems to avoid so your plants grow as fast and healthy as possible!
This cannabis seedling is being burned by too-close LED grow lights
When you have a small plant in a very big pot, it’s easy to overwater because the roots aren’t drinking much yet, and the big container takes a long time to dry out.
After giving enough light, growers can bury the extra stem, or just wait until the seedling grows out of it on its own