How Big Should My Plants Be After 2 Weeks?

Disclosure: As an Amazon Associate I earn from qualifying purchases. more info

If you are growing your own weed, then one of the things you do want to keep track of is the size of the plant, as this is a good indicator of progress. After all, some cannabis plants can reach 8 or 10 feet in height if properly grown. So, how big should cannabis plants be after 2 weeks?

A female 2 week old seedling should be between 2 and 3 inches in height, and should also have 2 to 3 sets of leaves. If your plant is shorter than 2 inches or taller than 3 inches when the 2 week mark comes around, then you might have some issues.

How Big Should My Plants Be After 2 Weeks?


How Tall Should My Cannabis Plant Be At 2 weeks?

At 2 weeks, your cannabis plant should be between 2 and 3 inches in height.

If your weed plant is any taller than that, especially if you notice it stretching out and getting tall and skinny, then chances are pretty big that it is not getting enough light or that the light source is too far away from the plant.

At the 2 week mark, you should also see 2 to 3 sets of leaves appearing, including the cotyledons, which are the rounded seedling leaves.

If your cannabis plant is too tall, you will want to change the type and amount of light it gets, and if it is too short, you might have other issues at play.

How To Tell If Your 2 Week Old Seedlings Are Ok?

Ok, so you have your seedling growing, but are not sure if it is ok or not. Below, we have a list of factors and tips to keep an eye out for, which will allow you to determine whether or not your seedling is ok.

  • The plant should be between 2 and 3 inches in height at this time. If the plant is far too short, then you may have planted it far too deep in the soil, the soil is too wet or dry for proper growth, or the temperature is not ideal.
  • If the weed plant is far too tall, especially if you notice it stretching out and getting tall and skinny, then chances are that your plant is not getting enough light, that the light source is too far away, or that there is not enough cool blue light being provided to your plants.
  • If your seedling is of the proper size, another way to tell if it is ok is to look at the number of leaves it has. It should have those 2 rounded leaves, as well as at least one or two sets of regular leaves. If your plant is not growing leaves, you have an issue.
  • You then also want to look at the health of the leaves and the stem, mainly the color. Everything here should have that classic green color. If the plant is turning black or is very pale, there is likely a nutrient or watering issue.
  • If your plant is limp and bent over, this is a sign that it is not healthy, and this is likely caused by the cannabis plant stretching out too fast.

Oops I Overwatered My female 2 Week Old Seedling

If you are a beginner, it is not uncommon to overwater your weed plants, particularly the seedlings, and this is dangerous as seedlings are susceptible to being overwatered.

Now, if you only slightly overwatered the seedlings, you can always just let them dry out. Try to get some airflow on them, keep ambient humidity levels low, give them plenty of light, and just let them dry out.

If the overwatering was not too severe, your seedlings should be just fine. However, if you gave them way too much water, you will want to take additional steps to stop root rot from occurring.

If this is the case, you may actually want to transplant the seedlings and remove as much of the soaking wet soil as possible, while leaving the roots intact, and then put the seedling in relatively dry soil.

At this point, you may also want to treat the soil and cannabis plant with a fungus killer to make sure that mold does not develop.

What To Expect in Week 3

By the time your marijuana seedling reaches 3 weeks of age, it should be finishing the seedling stage and entering its vegetative stage. When your weed plant is 3 weeks old, it should be around 5 inches in height.

Generally speaking, from the end of week 2 to the end of week 3, it should effectively double in height. At the same time, you should also notice that the weed plant is growing more leaves, up to 2 more sets of leaves.

Including the rounded seedling leaves, by the end of 3 weeks, your plant should have 4 or 5 sets of leaves growing, otherwise known as nodes.

What To Expect in Week 4

By the end of week 4, your cannabis plant should officially be in the vegetative state. By now, your weed plant should be at around 75% of its potential height that it will reach by the end of the vegetative state.

Here, your plants may be as tall as 8 or 10 inches, and should also have between 5 and 8 sets or nodes of leaves. During week 4 is when you are going to see plenty of explosive growth.

For week 5, see our separate article here.


There you have it folks, everything you need to know about how tall your weed plants should be after 2, 3, and 4 weeks of growth. If your weed plants are as tall as we talked about above, then everything should be on the right track.


My passion for the sticky icky started nearly a decade ago, and it all began when I first laid my eyes on the beauty that is the marijuana plant.

I cover all aspects of growing from equipment recommendations to plant health/care tips to help both new and experienced growers.