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Problem: Your plants leaves will start drooping if they've been over-watered or under-watered. If you've overwatered your plant, its leaves will be firm and curled down all the way to the stem of the leaf. You may also notice Chlorosis (Leaf Yellowing).
Plants use their roots to get oxygen which is dissolved in water or oxygen in their grow medium. When you overwater a plant, its roots are sitting in stagnant water which no longer has any oxygen left. The reason your plants droop is because basically their roots are starving for oxygen.
Overwatered Marijuana Plants
- Drooping / Curling is the first sign of overwaterd marijuana plants
- Leaves are firm and curled down all the way from the stem to the leaf
- Will eventually lead to leaf yellowing and other signs of nutrient problems if not corrected
Solution: The best thing you can do for overwatered plants is give them time without watering, and then start off watering slowly until things seem back to normal.
If plant medium seems to stay wet, you may need better drainage. Make sure that water drains freely from the bottom of your container (it's recommended that you provide enough water to get at least 20% extra runoff every time you water your plants). You should see water coming out the bottom within a minute or two after watering. Then don't water your plants again until the soil is dry up to your first knuckle.
If your plants are already overwatered, you can try to increase the temperature and airflow to help the water evaporate more quickly. You can also use a pencil to gently poke some air holes into the growing medium to provide extra aeration and oxygen to the roots.
For soil grows, you generally only want to water the plant when the soil feels dry if you press a finger in it. You can also use the "lift the pot" method to decide when to water your plants (basically wait until your pot feels "light" since the plants have used up all the water). For other growing mediums besides soil, your watering method will vary, but if your plants are drooping and you've been feeding them a lot of water, it's a good idea to cut back and see if that helps.
If you're growing hydroponically with your marijuana roots directly in water and you see the signs of overwatering, that means you have a problem at your roots. Either your plants have root rot which is preventing them from getting oxygen at their roots, or you are not dissolving enough oxygen into the water (you can easily increase the dissolved oxygen in your water with a quality air pump and a few air stones).
Need more help?
If your plant is experiencing "the claw" and not just normal drooping (the ends of leaves are curling like a claw or pointing down like talons), then you may actually have a n itrogen toxicity (too much nitrogen).
These Plants Are NOT Overwaterd, These Leaves Show Signs of
("The Claw", tips bent down, curling / clawing, dark green leaves)