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Brown spots started appearing on this autoflower f...
Deekilla247started grow question 2 years ago
Brown spots started appearing on this autoflower from Fastbuds others are okay. Day 54 in soil Temps 21-24C about 4 weeks into flower,PH water to 6.5 or around before watering. Giving CalMag 1ml/L when watering with half dose GH tripart nutrients. Humidity 55-65. Light 13 inch VP
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Leaves. Color - Black or grey
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GrowingGrannieanswered grow question 2 years ago
No diary = no information. This could be a magnesium excess although that's fairly rare. From the look of the pics, though, you shouldn't be giving them any calmag at this point and may indeed have an excess of magnesium which will cause a lockout of calcium... refer to this article to diagnose your problems yourself since you don't have a diary: https://futureharvest.com/blogs/articles/how-to-detect-deficiencies-and-toxicities-in-cannabis-plants
Good luck!
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AsNoriuanswered grow question 2 years ago
Most rob ph and Calcium issues ...
Anyway, for this girl all feed should be stoped.
Cal mag can make excess too !
Cal mag has NPK value with highest N part, so in late flower it should not be used.
Growing in soil if you follow strick ph and watering regime - magnesium should never be an issue too ...
Happy Harvesting !!!
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