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Hey i noticed some wierd brown looking spots on so...
ValleoGrowstarted grow question 5 years ago
Hey i noticed some wierd brown looking spots on some of my flowers, what could this be?
See photo Day 68 week 9
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416firemananswered grow question 5 years ago
To me it looks like a high ph issue! It also looks like light bleaching but considering ur light is over 20 inches away... the 7.0ph would highly likely be the culprit! 7 is rather high for cannabis plants in soil. Try n reduce ur ph and it should stop the spread and minimize the damage. Considering u still have a couple weeks left of flower u definitely should do a good flush and than follow up with a reduced feed. Happy growing and stay lit fam
Luciditeanswered grow question 5 years ago
My latest grow (Vegan Widows) has exactly the same issue. It is the most stretched plant, so closest to the lights. But it is also occurring in parts of the plants that aren’t really close to the lights. My soil ph has been high though. Maybe as high as 8. I brought it back down to 6.5 and applied calmag to the feed. No spread of the issue now. It is difficult to say for sure what triggers these things because it can also be a combination. One thing I have learnt to do is always keep a close eye on ph levels. Get ph right first before fixing any nute issue. Having said that my plant still looks otherwise really healthy and is so close to harvest I doubt this issue will have much impact.
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DankGardeneranswered grow question 5 years ago
With cannabis plants that have light burn, your leaves can sometimes become yellow or red/purple, possibly with brown spotting, often with burnt tips/edges and margins that stay green. I would back grow light off a few inches. Don't want the buds to get burned.
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