What Causes Curling Weed Leaves?

What Causes Curling Weed Leaves 1 - What Causes Curling Weed Leaves?

Cannabis plants can’t vocalize for help, but if something is wrong, they may communicate it. Almost every grower has seen his or her plant exhibit symptoms of distress at some point in time. This might include the plant drooping, leaves becoming yellowing, and/or leaves curling into a claw shape.

The most typical problem that many cannabis plants have is the curling or clawing of their leaves. Although weed leaves rolling down is a normal phenomenon, it may be difficult to cure for beginning growers.

Whether you’re a novice or a seasoned grower, you’ll need to figure out what’s causing your marijuana leaves to curl and fix it.


The first step in identifying the origin of curling leaves is to ensure that you aren’t overwatering your plant. Drowning, bud rot, and Pythium infection are all risks associated with over watering. Cannabis leaves curl as a result of both waterlogging and root rot.What Causes Curling Weed Leaves?

Underwatering is one of the most prevalent problems that novice growers confront, and it’s readily correctable. Before you water your plants, inspect them carefully. Examine the soil as well as the leaves. If your leaves are drooping and taking a long time to develop, and the dirt is dry to an inch deep or more, it’s time to water.

Otherwise, you should probably wait. In general, overwatering does more harm to your plants than gently underwatering them. Underwatering may also cause leaves to curl, in which case all you have to do is water them more often. If the plant’s leaves straighten back up within 30 minutes of having been watered, it’s clear that overwatering was the problem.

If your plant has been overwatered, allow it to dry for a few days and then change the schedule. A moisture meter, like a thermometer, is a high-tech instrument for determining whether or not a plant needs water. Your plants’ water saturation is determined at the root level by a moisture meter, as with a thermometer. If your plant still is damp even after drying it out for several days


Nutrients should not be applied in a heavy-handed manner. Excess amounts of nitrogen-rich plant growth base nutes can induce leaf clawing. They may even canoe at times. Overfertilizing with phosphorus and potassium during flowering will result in curly cannabis leaves and burned tips, as well as chlorosis. In both cases, chlorosis is a typical indication.

Feeding is a term that means different things to different people. Is it true, as they say, that feeding cannabis is difficult? Wrong! Almost every well-known brand of cannabis fertilizer offers a free feeding chart for download from their websites. Granted, not all cannabis cultivars respond the same way to fertilizers.

It’s preferable to start low and go slow. You can gradually boost doses without any indications of leaves curling or scraping. However, if you go straight to maximum strength, you may expect a lot of curly cannabis leaves that will undoubtedly die and fall off. It should go without saying, but it’s worth repeating for good measure: make sure the nutrient solution is the correct pH balance. For soil, 6.0pH is appropriate; for coco/hydroponics, however, 5.8pH is more accurate (a larger number means a higher pH).

Temperature Are Too Hot

Indoor or outdoor heat stress may happen. If your cannabis leaves curl and have ugly brown fringing, they’re sending you a distress signal. Cannabis plants can effectively photosynthesis at temperatures of up to 28°C. Anything more than 30°C risks damaging your plants. You’ve got real difficulties with this combination of temperature and humidity. New leaves will grow gnarly, while old leaves will curl yellow and maybe even burn to a rusty brown crisp.

Indoor growers must maintain proper environmental conditions at all times. This begins with the right distance between the lights. To keep the plant canopy in the sweet spot, measure and adapt until mature plants reach their maximum height during mid-late bloom, depending on the strain. Indoor growers may also utilize air conditioners and fans to keep their grow operation cool.

Outdoor growers have less control than indoor growers in hot weather and drought conditions. A simple mesh shade can help to keep plants a bit cooler and avoid leaves from fraying and curling. You won’t be able to regenerate charred leaves, so you’ll have to remove older growth. Also, instead of planting in black pots, plant in white pots to keep the root zone cooler.

Low Temperatures

Snow is another major reason for the browning of leaves. If temperatures are too hot, your marijuana plants will surely scratch. All sorts of leaf discoloration can also be caused by the condition. Finally, if you leave your marijuana plants exposed to low temperatures below 10 degrees Celsius for an extended period of time, they will eventually succumb to desiccation and lose their leaves and flowers.

What you can do is raise the temperature in your home. One option is to add more lights. If you’re growing marijuana outside, consider harvesting early or moving plants indoors at night. Although cannabis is a hardy plant, temperatures should always be kept between 20 and 28 degrees Celsius to prevent it from curling and remaining healthy.

Concluding on Curled Cannabis Leaves

It’s also a good idea to check your marijuana leaves for curling before they become a significant problem. You should have no trouble fixing curled cannabis leaves once you know what to do.

Do you have another idea for preventing your marijuana leaves from curling? Leave a remark below if you do.


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