Hi there, newbie here I noticed small purple blotches on my royal gorilla auto plant (heavily indica) and thought it might be a phosphorus problem. I mixed a diluted bloom feed as it is high in phosphorus and potassium and low in nitrogen. Few days later and it seems to be worse. The whole leaf is very rough and feels like paper. Any advice would be very much appreciated
Purple blotches and rough lower leaves
Fordprefect42
Well-Known Member
Just to save everyone else the trouble ....
Can you take a picture without the blurple lights turned on and provide some details about your environment? Purple blotches could be phosphorus, but dried out leaves could be excessive nutrients or too much heat.
Can you take a picture without the blurple lights turned on and provide some details about your environment? Purple blotches could be phosphorus, but dried out leaves could be excessive nutrients or too much heat.
Hi there, yes I’ve added the photos below, I haven’t changed my environment much other than adding another fan and dropping the humidity to around 55% RH. As for nutes I’ve been following a guide on YouTube that uses the flora trio
Attachments
Fordprefect42
Well-Known Member
Sorry to say, but I don’t have a clear opinion here so I’m not going to guess. It’s odd that the problem only shows clearly on that one leaf with a couple maybe greyish spots elsewhere. It’s lower on the plant which would align with phosphorous, but given that the problem is isolated and more phosphorus isn’t helping it must be something else. Maybe someone who is more knowledgeable has some thoughts.
wheresthekoosh
Well-Known Member
to keep things simple, it looks like a lowriding leaf that's probably burnt from being splashed when you're feeding, just remove it
Okay thanks for your honest opinion
Bukvičák
Well-Known Member
This is what I would do... point that fan to the wall not hammer your plant from 20cm straight flow. Check the light distance, seems to be quite close. Water less untill they grow in that pot, the small one looks suffering from overwatering. That leaf is old and its gone, remove it and watch that leaf next to it with that brown blotch and how hes doing further. Check your temps, you should should run higher with LED, and root zone temp also plays a role. They look quite nice BTW.
Growbig420420
Active Member
Yeah I agree with koosh. Looks like it has been burned. When water splashes on the leaf the water will magnify the light and cause it to burn
Thank you that’s really helpful I’ve made those changes