farmerfischer
Well-Known Member
Looking again they may have a couple things going on.. heres a leaf chart ,, its not the best but it may help you in future grows
Need help, not sure if its a deficiency or excess or something else
- Thread starter Choctaw
- Start date
Choctaw
Active Member
Thanks, i will get some close up pictures tonight.
My plant looked similar but much worse, and i'm 99% sure it's K deficiency, maybe a little but of N also, but it looks like mainly K.
I had magnesium deficiency and didn't have Epsom at hand, so i used Calmag which has much more Cal than Mag. My hard tap water also has lots of Cal so i overdosed my plant with calcium, which locked out magnesium and potassium.
You're adding Calmag every other watering but do you use tap water or RO? Because that could be your issue.. With tap water you don't really need Calmag besides few exceptions. Many nutrients and supplements already have some calmag, and combined with tap water it's the perfect amount.
I don't know if flushing would help, but i did a flush anyway and just used few teaspoons of Epsom salt and lots of Bloom nutes after. It helped and the yellowing slowed down, somehow i made it through harvest with yellow leaves lol..
And don't worry, you can still make it through harvest. Here's some pictures of my 1st grow, no judging please haha.. But as you can see the yellowing started very early but it managed like that for around 1 month until the end. It was an early harvest but ok weed for a 1st time, around 30g and better than street weed in my area
You are much closer to harvest than i was, and you have much less yellow leaves.
I had magnesium deficiency and didn't have Epsom at hand, so i used Calmag which has much more Cal than Mag. My hard tap water also has lots of Cal so i overdosed my plant with calcium, which locked out magnesium and potassium.
You're adding Calmag every other watering but do you use tap water or RO? Because that could be your issue.. With tap water you don't really need Calmag besides few exceptions. Many nutrients and supplements already have some calmag, and combined with tap water it's the perfect amount.
I don't know if flushing would help, but i did a flush anyway and just used few teaspoons of Epsom salt and lots of Bloom nutes after. It helped and the yellowing slowed down, somehow i made it through harvest with yellow leaves lol..
And don't worry, you can still make it through harvest. Here's some pictures of my 1st grow, no judging please haha.. But as you can see the yellowing started very early but it managed like that for around 1 month until the end. It was an early harvest but ok weed for a 1st time, around 30g and better than street weed in my area
You are much closer to harvest than i was, and you have much less yellow leaves.
Last edited:
BongerChonger
Well-Known Member
Whatever you choose to use for a boost in N or K do it sparingly at first. They've come this far. Not a long time left, but plenty of time for things to go more wrong.
You probably won't see the leaves get any better either, but it may slow progression down.
If you didn't have a really close inspection for bud rot where those brown leaves are, I'd check again to be safe.
Wise to remove any dead leaf as well. Any bits still on the bud is really asking for trouble.
Watch for bits like in the fourth photo down from your post above. There's the crispy brown leaf, but just above it is a brown / dead petiole still stuck in the bud. That's asking for rot in my honest opinion.
It's really easy to miss.
I'd check those sites on the colas for any bud rot, by opening it slightly and having a peek.
You probably won't see the leaves get any better either, but it may slow progression down.
If you didn't have a really close inspection for bud rot where those brown leaves are, I'd check again to be safe.
Wise to remove any dead leaf as well. Any bits still on the bud is really asking for trouble.
Watch for bits like in the fourth photo down from your post above. There's the crispy brown leaf, but just above it is a brown / dead petiole still stuck in the bud. That's asking for rot in my honest opinion.
It's really easy to miss.
I'd check those sites on the colas for any bud rot, by opening it slightly and having a peek.
Choctaw
Active Member
Wow, looks exactly like mine does. Thanks for sharing those pictures it helped alot for a comparison. Im working on getting some N&K in the soil now. Just enough to finish my grow. I have learned how thirsty autoflowers can be. Not to bad for my first grow.My plant looked similar but much worse, and i'm 99% sure it's K deficiency, maybe a little but of N also, but it looks like mainly K.
I had magnesium deficiency and didn't have Epsom at hand, so i used Calmag which has much more Cal than Mag. My hard tap water also has lots of Cal so i overdosed my plant with calcium, which locked out magnesium and potassium.
You're adding Calmag every other watering but do you use tap water or RO? Because that could be your issue.. With tap water you don't really need Calmag besides few exceptions. Many nutrients and supplements already have some calmag, and combined with tap water it's the perfect amount.
I don't know if flushing would help, but i did a flush anyway and just used few teaspoons of Epsom salt and lots of Bloom nutes after. It helped and the yellowing slowed down, somehow i made it through harvest with yellow leaves lol..
And don't worry, you can still make it through harvest. Here's some pictures of my 1st grow, no judging please haha.. But as you can see the yellowing started very early but it managed like that for around 1 month until the end. It was an early harvest but ok weed for a 1st time, around 30g and better than street weed in my area
You are much closer to harvest than i was, and you have much less yellow leaves.