What causes leaves to look like this?
- Thread starter Azubaz
- Start date
hotrodharley
Well-Known Member
Likely a phosphorus deficiency.
Azubaz
Well-Known Member
I also forgot to mention yesterday it was pretty cold in the room so i put the soace heater on like a foot away from the plants and left it on for like 5 minutes by accident. Maybe it could be from that. I also put them into flower a week ago so they could need some P.
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JohnDee
Well-Known Member
Not likely Az. The discoloration on your leaves follow a specific pattern. Leaf tips and margins. Heat burn wouldn't do that I don't believe.
Most nutes have plenty of everything needed to grow marijuana. So deficiencies are quite often from lockout or more specific chemical interactions. You're gonna have to tell us the full story unless you just want guesses...
JD
Azubaz
Well-Known Member
Hmm well they are maybe a month old now, they were locked out early on, i had fed to much nutes and over watered. After flushing for a little and repotting they starting looking great. I put my lights to 12/12 about a week ago. If i remember right my last 2 waterings have been plain water, plain tap water. So last i fed them was maybe 2 weeks ago. I have AN over drive which is usually what i use for my flowering nutes.
Azubaz
Well-Known Member
Shotgun approach. I just use Happy Frog soil. I don't believe my tap water is hard. I usually don't have to add any cal mag to it. I always use it with no problems like such.
They could be locked out maybe but from what i understand that is from nurtients and i haven't used some in the last couple feeds.
If it is short on some P should i add some next feed?
Herb & Suds
Well-Known Member
I'm just guessing here ...poor watering habits?
Azubaz
Well-Known Member
I have 3 plants in total, only 2 look like this. It's minor and only affected on certain leaves. When i had the space heater on yesterday it was only facing the 2 plants affected. The heater was on a pretty warm setting. Next day they are immediately affected and other plant is fine. Though i did water the 2 plants affected the day before. So i suspect either heat burn or over water.
Azubaz
Well-Known Member
I think it's how i been watering. I think they are over watered and it's effecting the roots.
JohnDee
Well-Known Member
AZ,
Phosphorus absorbs at a fairly high PH...so a little soil acidification from salt build-up would/could cause that P malabsorption. Just adding more P might not do it if it's being locked out.
One reason guys ad mycophizzal bacteria and fungus (bennies) is that it promotes better P absorption. So here's the plan...add some benificial bacteria (sorry I don't have any products immediately in my head)
Start feeding...like maybe water water feed repeat. With good drying in between. Go with low dose nutes and build up. That's what I'd do...
JD
Azubaz
Well-Known Member
On both plants it's only on one side so that's what i think it's from the heater honestly i forgot to mention it's only on one side. Plus i had them really close like a foot away like an idiot
JohnDee
Well-Known Member
You get one demerit for ommitting that info...
JD
Dieseltech
Well-Known Member
Looks like heat damage I would trim off the damage parts and stick to water and reevaluate in few days feed ect
Azubaz
Well-Known Member
Should i not have?
Gond00s
Well-Known Member
just don't put your heater facing or near your plants and you'll be fine they'll come right back
Azubaz
Well-Known Member
They were like 1 foot away when i had the heater on. Yeah ill see within a couple days how they look.