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Curled leaves

Magic43562
Magic43562started grow question 4 years ago
White critical photo period. Leafs are curled up and a leaf on some new growth is looking a little funky? What could be causing this. Last watered yesterday morning currently 81 degrees with 61% humidity
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Week 4
Leaves. Curl up
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Nor_Cal_Kannabliss
Nor_Cal_Kannablissanswered grow question 4 years ago
It's a symptom of heat stress.. Sadly we get it too with the 110f temps here.. Some things to try when you know the weather outside is going to be hot or dry: water plants in the evening or early morning to help prevent water evaporation during the hottest hours keep roots cool – for example by putting your potted plant in a ceramic pot to help insulate the roots from the sun. I’ve also heard of growers digging a hole in the ground to place their potted plant inside, because the ground is usually cooler than the air when the temperature gets high Organic Liquid Sea Kelp Extract can help cannabis plants recover from heat stress, extreme environmental conditions, and may even help plants be protected for future heat waves kelp extract for roots – provide a small amount of liquid fertilizer that contains seaweed kelp extract (can help protect against heat stress) increase shade to reduce the heat experienced by plants – you can use an old sheet or other cloth as a short term solution, or get a professionally made “Sun Shade Sail” which is made particularly to create shade outdoors. It’s important to remember that giving plants shade for more than a few days will make them less “hardened” to the sun, and you may need to reintroduce full sunlight back slowly to prevent them from getting shocked from the light intensity move potted plants – luckily with potted plants, it’s usually easier to move them out of direct sunlight during a heat wave take extra good care of heat-stressed plants – when cannabis plants appear heat-stressed, try to baby them as best you can, and offer shade during the hottest days. When growing cannabis outdoors, it can often take a few weeks for plant to recover after a hot or dry spell, so prevention is the best medicine for outdoor plants. Hope this helps friend! 👊
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Experimentgreen
Experimentgreenanswered grow question 4 years ago
Hello The heat can definitely cause those cupping leaves. Otherwise it can sometimes be route stresses and sometimes wind can cause weird leaves also, you did just transplant so they may be a little irritated from that and the combination of the high heat and low humidity. The more the plants are outside the more thou get acclimated to the Sun and very high temperatures. Even the rain is tolerable by the plants. If you're able to mostly keep them outside they'll get more and more adjusted, but with moving inside and outside that could cause some irritation from the different environments. My area was 100 degrees and 12% humidity last week, most of the plants had praying leaves. I think your plants will calm down soon. Sometimes kelp extract can be a very gentle plant tonic, and if you don't use a silica product consider using one as it can really help with heat and strong light etc.
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