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Grow QuestionsLeaves curling up on new growth

Leaves curling up on new growth

Blackhammerstarted grow question 5 years ago

Leaves started curling up on all new growth. Thanks in advance for any advice.

Blackhammer

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Leaves. Curl up

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Nor_Cal_Kannablissanswered grow question 5 years ago

When the the serrated edges of marijuana leaves curls or tip up like that, it’s often a sign of temperature stress, overwatering/root problems or extreme humidity levels. Your medium dosen't look overly saturated.. So i'm going to go with to warm or your light is too close. what's your average room temp at the top of your canopy? Cheers and happy growing!

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Blackhammeranswered grow question 5 years ago

I am using mushroom compost and perlite. Adding nutrients at a 1/4 the suggested strength. Thanks for the advice. Happy growing!!

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Eagersanswered grow question 5 years ago

Yes pretty sure it is heat stress, new grower here also hit with a heatwave whilst in windowsill. Could have a feel of the medium? Mine was very warm when carrying water then roasted in sun. Left medium cooking the roots! It will stunt the growth a bit but possibly make sure it doesnt get the intense sun on the pot during the day. At least thats what happened to me, had to deal with stunted growth but it should bounce back. Good luck, hope the grow goes well 👍

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Blackhammeranswered grow question 5 years ago

This is an outdoor grow. We did have a few days of high temperatures and humidity. Thank you for the advice.

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