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donovanliam started grow question 3 years ago
the lower older fan leaves are curling and developing brown spot and the inside newer growth is light green alomst yellow. what am i doing wrong?
Dono Acapulco gold
23 weeks
Dono Acapulco gold donovanliam
Acapulco Gold
22 comments · 3 years ago
Week 13
Leaves. Other
OutForReal answered grow question 3 years ago
Hello bro ! So the 1st thing you are doing wrong is the PH, in soil you should have a level between 6 and 6.5 PH instead of 5.5 like I can see here. The second thing you should change is your light schedule for a photoperiodic strain no need to give them more than 18h of light , the 20h is more an Autoflower schedule. The others parameters looks good to me except the distance from the light because even if you are using a led it is still producing heat so 12cm from the top is a bit low and you would cover a larger space with 20cm. Now about your leaves issue and from what I can see on the photo rhey are perfectly fine. Usually when you can spot a deficiency from the bottom to the top it is a mobile nutrient one and what you describe makes me think of a Potassium excess with your older leaves curling, with spots on it and that excess lead to immobile nutrient deficiencies such as Zinc and Iron and also a cal mag red due to the excess , you should flush your medium and low your Potassium amount, a flush can help to wash the nutrient excess away and make the balance .I hope it will help you :grin::+1:
DissNoof answered grow question 3 years ago
hey man, vegging on 24/7 is a great idea, really works well + it helps get that veg going quick. Thing is the plant will kind of go into overdrive, which means a faster more intense metabolism. fast metabolism means faster growth, faster growth means you need more plant juice if you want the plant to be healthy. You've just got run of the mill calcium and magnesium deficiencies from the growing too fast. Very simple to fix. Just get some cal mag , probably the flora micro works. See what the label says about feeding quantities , double that to reach saturation, then use that solution in a spray bottle and spray the plants once a day until they're dripping wet. This should fix your problem in five days or so. Hope this helps bro - merry christmas ! :rocket: