Jumpin Jimmy
Well-Known Member
Taking pics under those lights is all bad. Show em in natural light or daylight bulb
Help with a deficiency
- Thread starter Budman82
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Jumpin Jimmy
Well-Known Member
Yea those spots don’t look like mite damage at all. Can look similar to an untrained eye.
osowhom
Well-Known Member
thanks i am still apprenticing and gathering knowledge
I will post a picture tomorrow. Its in the dark cycle right now
OldMedUser
Well-Known Member
It looks like the beginning of toxic salts buildup to me. If so it will get progressively worse in the next couple weeks. Shows up usually mid-flower.
I don't see any evidence of bugs.
Good luck!
I don't see any evidence of bugs.
Good luck!
Even though I'm not using fertilizers?It looks like the beginning of toxic salts buildup to me. If so it will get progressively worse in the next couple weeks. Shows up usually mid-flower.
I don't see any evidence of bugs.
Good luck!
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OldMedUser
Well-Known Member
Toxic salts buildup doesn't need added fertilizers to happen. Even pure organics are broken down to salts for the plants food and minerals in the water are also salts that can add to the buildup. I had nothing but trouble with that for a number of years and found out that my chronically low RH was a huge contributor to it. With very low RH the plants transpire much more water than they do with the proper VPD and draw up more nutrients than they can process so store it in the leaves. Eventually it becomes too much and the leaves begin to burn up internally. Mine always started off looking like your leaves do then it spreads across the leaf surface until they get all thick and crispy with yellow/brown colouring. Very unlike normal yellowing as leaves age out in late flower where they feel thin and limp. It spreads to younger leaves and even into the tiny bud leaves if it's bad.
A minor flush to reduce salts in the soil slows it's progress but doesn't stop it. A good slow dry and cure seems to get the buds as tasty as anything so it doesn't ruin the crop unless really chronic.
I'm hoping I'm wrong about yours but I've seen it often enough to believe I'm right.
Jumpin Jimmy
Well-Known Member
I’m gonna chime in and say this has nothing to do with a Toxic salt build up and flushing will only increase your problem. I’m seeing a beautiful calcium deficiency unfolding with the whispering s of a magnesium deficiency on the horizon. Forget about salt build up. Not sure what is in someone’s head to make them even say such a thing. This is a simple fix. No worries
OldMedUser
Well-Known Member
Like I said I hope I'm wrong and maybe I am. I only grew my first buds in 1978 then on and off until 20 years ago when there has not been a day when there isn't pot growing in my house. A few hundred plants later I'm still learning new things all the time.
Pretty rare to get those deficiencies in the soil and organic ferts he's using tho.
Time will tell.
Jumpin Jimmy
Well-Known Member
Not rare at all. I use ocean forest and will see those deficiencies after a while. He definitely has calcium deficiency.Like I said I hope I'm wrong and maybe I am. I only grew my first buds in 1978 then on and off until 20 years ago when there has not been a day when there isn't pot growing in my house. A few hundred plants later I'm still learning new things all the time.
Pretty rare to get those deficiencies in the soil and organic ferts he's using tho.
Time will tell.
I'm going to use a dose of cal mag and see if the progression slows. Thanks for the info and opinion. Rest of the plant looks beautiful with all the leafs praying to the light lol
I've been following this chart since the start. I have a background in horticulture so I understand the use of vpd quite wellToxic salts buildup doesn't need added fertilizers to happen. Even pure organics are broken down to salts for the plants food and minerals in the water are also salts that can add to the buildup. I had nothing but trouble with that for a number of years and found out that my chronically low RH was a huge contributor to it. With very low RH the plants transpire much more water than they do with the proper VPD and draw up more nutrients than they can process so store it in the leaves. Eventually it becomes too much and the leaves begin to burn up internally. Mine always started off looking like your leaves do then it spreads across the leaf surface until they get all thick and crispy with yellow/brown colouring. Very unlike normal yellowing as leaves age out in late flower where they feel thin and limp. It spreads to younger leaves and even into the tiny bud leaves if it's bad.
A minor flush to reduce salts in the soil slows it's progress but doesn't stop it. A good slow dry and cure seems to get the buds as tasty as anything so it doesn't ruin the crop unless really chronic.
I'm hoping I'm wrong about yours but I've seen it often enough to believe I'm right.
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What would be a safe dosage of cal mag to correct the problem?
OldMedUser
Well-Known Member
Your guess is as good as mine. I mainly grow in soilless Promix HP with RO water and hydro nutes and use maybe 1/4 strength CalMag once in a while. Plenty of calcitic and dolomitic lime in the mix so adding lots more has it's own problems and I never really see any deficiencies.
CalMag is not the magic cure a lot of people think it is. Low Mg shows up in older leaves first as it's mobile and can be relocated to newer growth where Ca is immobile and symptoms show up in newer growth when it's deficient.
CalMag is also mineral salts so I would tread lightly.
OkSureWhyNot
Active Member
I recently learned my calmag adds N , fwiw.
Slightly 2-0-0
CheersYour guess is as good as mine. I mainly grow in soilless Promix HP with RO water and hydro nutes and use maybe 1/4 strength CalMag once in a while. Plenty of calcitic and dolomitic lime in the mix so adding lots more has it's own problems and I never really see any deficiencies.
CalMag is not the magic cure a lot of people think it is. Low Mg shows up in older leaves first as it's mobile and can be relocated to newer growth where Ca is immobile and symptoms show up in newer growth when it's deficient.
CalMag is also mineral salts so I would tread lightly.
Ill just experiment with a few different things. In the end its just a plant. I can just grow anotherYour guess is as good as mine. I mainly grow in soilless Promix HP with RO water and hydro nutes and use maybe 1/4 strength CalMag once in a while. Plenty of calcitic and dolomitic lime in the mix so adding lots more has it's own problems and I never really see any deficiencies.
CalMag is not the magic cure a lot of people think it is. Low Mg shows up in older leaves first as it's mobile and can be relocated to newer growth where Ca is immobile and symptoms show up in newer growth when it's deficient.
CalMag is also mineral salts so I would tread lightly.