Not sure whats wrong? Only one plant affected. Help Please *pics*

Hi guys.

Its been a long ol time since i posted on here. i used to be a regular, just gone of the radar growing haha.

Got a problem with one of my plants and im not sure what the problem is as they are all getting the same feed and same soil etc

On the left side i have Fast Buds - zkittles and on the right i have Fast Buds - Star Dawg. I have done SD many times and never had this problem.
The problem is with one of my SDs some leaves have started getting copper brown spots going dry and curling then eventually die off.

I have only been feeding grow till now. but today i fed the SDs some bloom as they are flowering and i thought that might be the problem?

They might look a bit droopy as ive just watered them after a few days



dont think i forgot anything ??
any ideas guys?

Thanks people

Grow details:
2x 600w
temps between 20c - 28c
RH: 40%-70%

biobizz light mix soil
plant magic old timers
mycro fungi

Everything ok in way of PH? Looks like you're definitely dealing with a deficiency or lockout of some nutrient, I just can't quite put my finger on what...if it weren't for the bright yellow splotches and veins, I would say that it looks like phosphorous deficiency...have you given bloom boosters?

Looks like it could be a disease tbh, something fungul possibly. Maybe something at the roots like rot, but i'm not so sure tbh.

No nutrient problem i can think of does that. Those dry grey sections of leaf are what's got my attention.

First of all, i'd physically remove anymore affected leaves, and destroy them. There's a chance physical removal will nip it in the butt right away.
Second, check everything with your environment and make sure it's on point. Ph, temps, humidity, everything, dry the pots out too. Besides eliminating any possible environmental causes, it'll help the plants natural defenses against disease.

If it comes back you might want to consider a preventative. Being in flower i'm not sure which sprays you can safely use. Maybe something copper based? Again i'm not sure, so do some digging. You don't want anything that's systemic, or that leaves toxic residuals behind for weeks at a time.

Hope it helps, good luck.

Logan Burke said:

Everything ok in way of PH? Looks like you're definitely dealing with a deficiency or lockout of some nutrient, I just can't quite put my finger on what...if it weren't for the bright yellow splotches and veins, I would say that it looks like phosphorous deficiency...have you given bloom boosters?

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havent really checked ph bcause its an organic soil. all the other plants are on the same schedule and nothing is wrong with them?

i have only fed grow so far. except for today i fed bloom. but no i havent used any other kind of booster.

just really bugging me

thanks man.

Aussieaceae said:

Looks like it could be a disease tbh, something fungul possibly. Maybe something at the roots like rot, but i'm not so sure tbh.

No nutrient problem i can think of does that. Those dry grey sections of leaf are what's got my attention.

First of all, i'd physically remove anymore affected leaves, and destroy them. There's a chance physical removal will nip it in the butt right away.
Second, check everything with your environment and make sure it's on point. Ph, temps, humidity, everything, dry the pots out too. Besides eliminating any possible environmental causes, it'll help the plants natural defenses against disease.

If it comes back you might want to consider a preventative. Being in flower i'm not sure which sprays you can safely use. Maybe something copper based? Again i'm not sure, so do some digging. You don't want anything that's systemic, or that leaves toxic residuals behind for weeks at a time.

Hope it helps, good luck.

Click to expand...

You really think it could be a disease? im not sure.... i dont really wanna be pulling of the leaves unless im certain?

Thanks

mlore said:

You really think it could be a disease? im not sure.... i dont really wanna be pulling of the leaves unless im certain?

Thanks

Click to expand...

I can't say i'm absolutely 100% certain, but i'd bet the whole house it isn't nutrient related. The only deficiency i can think of that comes remotely close is a severe phosphorus deficiency. The chances generally of this being the case though.....especially soil.

If your environment checks out, disease is where i'd be leaning towards. I might not be right, but it looks a little suspect to me.

P.S. I'd check the soil's ph too, just to be certain it isn't a P lockout.

Aussieaceae said:

I can't say i'm absolutely 100% certain, but i'd bet the whole house it isn't nutrient related. The only deficiency i can think of that comes remotely close is a severe phosphorus deficiency. The chances generally of this being the case though.....especially soil.

If your environment checks out, disease is where i'd be leaning towards. I might not be right, but it looks a little suspect to me.

P.S. I'd check the soil's ph too, just to be certain it isn't a P lockout.

Click to expand...

Hmmm, thanks.
Ive just started my bloom nutes, and to be fair I have been a little late feeding them their bloom.
Il keep an eye on it and see how it goes. If it gets worse after the feed, il have to guess it’s a disease and start plucking ‍

I took some more leaves off to have a closer look.
Here’s some more photos below if it helps?

mlore said:

Hmmm, thanks.
Ive just started my bloom nutes, and to be fair I have been a little late feeding them their bloom.
Il keep an eye on it and see how it goes. If it gets worse after the feed, il have to guess it’s a disease and start plucking ‍

Click to expand...

Might be phosphorus then, i suppose. Did the soil's ph check out?

I can't say for sure anymore, what it is tbh. I scourered the Internet looking for similar looking infections just now. Only similar ones i could see, was yellow leaf spot. The leaves were grey and dry like yours, but you could see yellow spot too, further inwards on the leaf. "Yellow Leaf Septoria" was the name i believe. If you have no spots, i'd say probably rule that one out.
Have a bit of a search yourself, see if you find anything. There's a complete list of hemp diseases i found on Wikipedia while searching.

Imo i'd check the soil's ph, if you haven't yet. It could be too low locking out P. That's what i'd be checking, and drying the pot right out incase of a little rot, if they've been drooping.

It's the best i can do i'm afraid. It does look suspect imo, if absolutely everything checked out it's what i'd consider. But only as a possible solution when all else has failed.

Sorry i can't be of more help, i'm afraid i'm unsure myself.

mlore said:

I took some more leaves off to have a closer look.
Here’s some more photos below if it helps?

Click to expand...

Certainly lacking in some nutrient. The cause may be PH, or the cause may simply be that the microbes in your organic soil aren't converting the organic matter into nutrients quickly enough for your rapidly growing plant. Do you supply your organic soil with microbes to assist in the breaking down of organics? Nutes are unusable in the form of organics, they need microbes to break them down into a usable form that the plant's roots can absorb. I've heard of Blackstrap Mollasses being used, as well as products available for purchase such as Great White, which is a good choice. I use it in my hydro system to help break down dead roots and leaf matter that falls into the res

Logan Burke said:

Certainly lacking in some nutrient. The cause may be PH, or the cause may simply be that the microbes in your organic soil aren't converting the organic matter into nutrients quickly enough for your rapidly growing plant. Do you supply your organic soil with microbes to assist in the breaking down of organics? Nutes are unusable in the form of organics, they need microbes to break them down into a usable form that the plant's roots can absorb. I've heard of Blackstrap Mollasses being used, as well as products available for purchase such as Great White, which is a good choice. I use it in my hydro system to help break down dead roots and leaf matter that falls into the res

Click to expand...

I am leaning towards it being some kind of lack in nutrients. Like i said, i was a bit late with my organic bloom and for some reason this girl seems to have reacted for the lateness? The buds seem to be doing okay though.
Yea i do use Great White. But i only used it once at the start because i heard that's all you need. Maybe i should give them another watering with it.
Hopefully it starts to subside now Ive started the correct feed. Time shall tell.
Also i still haven't checked the PH as i cant find my meter! I haven't used it in ages.