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Diagnosis help needed
- Thread starter HighLife
- Start date
Reminds me of PH issues, have you looked in this link yet?
https://www.growweedeasy.com/cannabis-symptoms-pictures
https://www.growweedeasy.com/cannabis-symptoms-pictures
Rootsruler
New member
Are all the leaves doing this or just the ones at the top?
HighLife
New member
Mostly towards the top. Light stress?
Rootsruler
New member
Looks like a combination of too much PPFD causing some sort of deficiency. Molybdenum?
OldManGrower
New member
This is a toughie. I'm gonna guess you need to add cal mag and additional nutrients especially in the Micro range. I think there is more than one issue here. What nutrients do you use, what is your light?
HighLife
New member
So I think it's a light issue mostly. Two plants in a 4x4 with hlg blackbird 600W on full blast 18/6. I read that the light should be appropriate for the square footage of the canopy and not the tent size. Cut the light back to 40% and they look happier for sure. That also helped lower my temp and raised rh a tad and brought VPD down.
Nutes.... I advanced nutes to late flowering way too early so backpedaled on that. Got a digital ph meter and TDS to help.
We'll see how they're doing by end of the week. My first grow and my heart and soul are in these bitches. I might need bereavement time from work if they don't make it. 😵â€ðŸ’«
Nutes.... I advanced nutes to late flowering way too early so backpedaled on that. Got a digital ph meter and TDS to help.
We'll see how they're doing by end of the week. My first grow and my heart and soul are in these bitches. I might need bereavement time from work if they don't make it. 😵â€ðŸ’«
HighLife
New member
I also read somewhere... Who knows where I read it at this point. But read that cal mag deficiency usually starts at the bottom leaves and there are at the top that look like that. Quite possible I'm remembering what I read incorrectly as well. I'm about to the point I'm dreaming about it!
OldManGrower
New member
It's difficult to provide too much cal-mag. Won't hurt. Your light was probably overkill. Look, you cannot make more mistakes on your first grow than I did (or your 2nd,3rd etc.). Having issues is part of the process, recovering from them is how you learn. Some people just have the knack, the rest of us have to work at it.
Bluey
Well-known member
What happens if you give it too much calmag is you end up with a serious case of Nitrogen toxicity.
Most calmag is in the form of nitrates..sure the cal and the mag are fine but the N is not. Do not give past 3rd week of flip. Flowering cannabis does not like much N and it's easy to poison them with N if you give too much in veg.
Most calmag is in the form of nitrates..sure the cal and the mag are fine but the N is not. Do not give past 3rd week of flip. Flowering cannabis does not like much N and it's easy to poison them with N if you give too much in veg.
HighLife
New member
Reviewing the info on gwe it doesn't look or sound like phosphorus deficiency or OD. None of the pictures fit and it's only at the top, not bottom. I've tested the soil for PH but that's it. Do I really need to get a soil test kit of some sort? Haven't read much on that just that keeping ph in line fixes most nute problems. I think I'll stick with the changes I've already made for the week and see where we are come Sunday. I'm not noticing any newly impacted leaves. (Heavy sigh)
Gingerbeard
New member
HighLife About your post #10.
I just read your comment about needing probes and testers and junk. Sort of.
When you first start doing something, it is good to know what is happening when you do it. For example...
Last grow, I put 2.25 tsp of pH down in 4 gallons of water. I tested the first two times and again when I flipped to flowering. This grow, I'm closer to 2.75 per gallon. No idea why. My water is dialed in and the probe will stay in the cupboard for a few more weeks.
Did I need a tester? Yes. Did I need it every time? No. But the times I did need it were worth my crops. Eat in a few nights and spend the extra money on something a little better you think you can afford based on research you are comfortable with and get a warranty!
Conversely, buy something cheap. Cheap often works as good or better than the high end. If it doesn't suit you, you haven't lost too much money.
I just read your comment about needing probes and testers and junk. Sort of.
When you first start doing something, it is good to know what is happening when you do it. For example...
Last grow, I put 2.25 tsp of pH down in 4 gallons of water. I tested the first two times and again when I flipped to flowering. This grow, I'm closer to 2.75 per gallon. No idea why. My water is dialed in and the probe will stay in the cupboard for a few more weeks.
Did I need a tester? Yes. Did I need it every time? No. But the times I did need it were worth my crops. Eat in a few nights and spend the extra money on something a little better you think you can afford based on research you are comfortable with and get a warranty!
Conversely, buy something cheap. Cheap often works as good or better than the high end. If it doesn't suit you, you haven't lost too much money.
Smallgrow
Well-known member
I’m running a 465w Photontek in a 3x4 (3x3 grow area )and I’m really finding it hard to get away from the light issues. I keep Turing it down and raising it up.
I think at this point, that when you’re not totally dialled in like a few of the pros around here you just can’t take all that light. I feel like I do pretty well, but these lights we have are really powerful and some of us get carried away.
I just keep practicing
I think at this point, that when you’re not totally dialled in like a few of the pros around here you just can’t take all that light. I feel like I do pretty well, but these lights we have are really powerful and some of us get carried away.
I just keep practicing