Cannabis leaves curling up and down is one of the most common problems while growing Cannabis at home. If you’re a beginner, growing cannabis can be a little tricky and this one may happen to you as well. But, you can easily spot the issue by following the tips below.

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The Causes of Cannabis Leaves Curling Up and Down

Here are some probable causes of cannabis leaves curling up and down. All you need to do is check which one is causing your Plant issue and then proceed with the right remedy.

Overfeeding

The first common problem with growing cannabis is overnutrition or overfeeding. Fertilizers are really important for cannabis plant growth but checking the amount is essential. Young weed plants sometimes can’t tolerate an excess amount of nutrients derived from fertilizers.

Nitrogen, potassium, and phosphorus are three essential nutrients for cannabis growth, which are present in fertilizers. But, if you provide your plants with an excess amount of fertilizer, these nutrients may have a negative impact on the plants, causing the leaves to curl up.

Malnutrition

The second common issue with cannabis cultivation is malnutrition, which is just the opposite of overfeeding. Nitrogen is an essential nutrient for cannabis plants and the deficiency can cause young leaves to curl up or down. Another symptom of nitrogen deficiency is late flowering.

Not providing your cannabis plants with enough nutrients (fertilizers) or nutrients going bad are the two things that you need to check. Check whether the nutrients have turned cloudy, discolored, or crystals have grown, which are some common symptoms of malnutrition.

Overwatering

According to some experts, it’s the most common problem with cannabis plantations. Overwatering may cause your plant stems to snap water and then suddenly curl as they dry out. Other overwatering symptoms to check are whether the leaves have brown spots or discoloration.

Overwatering may swell your plant leaves, causing them to droop and curl down. Also, sometimes it leads to root problems in cannabis plants, causing the same issue.

Soil Problems

Sometimes, unsuitable soil can make cannabis leaves curl up and down. Cloudy and moldy soil can be very harmful to cannabis plants, leading to a consecutive lack of oxygen. Soil texture, water retention capacity, and drainage are the three things that play vital roles in successful cultivation.

The pH level of your soil keeps it well-nourished and moistured, which you need to check. Exposure to humid conditions can make the soil lumpy or cloudy, which can lead to this issue.

Temperature

The next issue with cannabis cultivation is temperature, which can be either too hot or too cold. If your growing temperature is too high and there’s a lot of humidity, the leaves may wrinkle or curl up.

On the other hand, if the growing temperature is too cold, the leaves may curl down. That’s because the photosynthesis process of cannabis plants slows down in cold weather. If you’re growing outdoors, it can be the main cause.

Root Problems

Ensuring the root health of cannabis plants is as important just as other vegetable or flower plants. If the root is weak, it can’t supply enough water to the leaves. As a result, the leaves may start showing visible changes, and curling upwards or downwards is one such issue.

If you’re planting root-bound plants, you need to be really careful. That’s because the tightly bound root balls have a high chance of rotting, leading to the leaves curling up or down.

Genetics

Today, many breeders are crossing cannabis strains too frequently. And it’s quite evident that an unsuccessful cross can lead to poor quality strain.

Genetic abnormality of such strains may lead to the curling up and down of the leaves along with other growing issues. For this reason, checking the strain profile is important while buying seeds.

Conclusion

These are the main causes of cannabis plant leaves curling up and down, which you can check by following the above tips. When it comes to choosing cannabis seeds, you can rely on Farmers Lab Seeds. We ensure top-quality seeds that are delivered to the doorsteps within just a few days!