CalMag difficiency, or light too strong?

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savagemonk

savagemonk

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Organic grow. The only source of CalMag has been through compost tea with molasses and there is some glacial rock dust in the soil.

Some leaf stalks becoming slightly red/purple.

On the next transplant will be adding gypsum and dolomitic limestone (in a week). Adding compost tea today (with double molasses than usual and some glacial rock dust) to see if it helps the following symptoms:

What do you think is going wrong? I don’t pH my compost tea as the microbes are supposed to take care of that. Regular water I pH to 6.5.

Ive raised the kind led light twice to reduce the intensity. Could the discolored leaf be from light bleaching?
 
Calmag difficiency or light too strong
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mysticepipedon

mysticepipedon

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I've never actually seen that pattern on leaves before, so I don't know what it is. But I notice it's on lower leaves, which makes me doubt it has anything to do with light intensity.
 
Homesteader

Homesteader

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Are you sure you don't have thrips? I would scope those lower leaves and look for movement. I would highly recommend getting some gypsum and a magnesium source if you aren't using compost. Compost will have mag but not much calcium. You need calcium. Plants consume a lot of it.
 
Homesteader

Homesteader

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I thought you were in soil. Disregard the gypsum and get cal mag
 
savagemonk

savagemonk

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I thought you were in soil. Disregard the gypsum and get cal mag
I have a half inch top dressing of expanded clay pebbles for decor, protection of microbes from the light, reduction of evaporation.
Underneath that I’m using 2-3 parts peat to 1 part compost with some amendments that didn’t have enough calmag.
 
savagemonk

savagemonk

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Are you sure you don't have thrips? I would scope those lower leaves and look for movement. I would highly recommend getting some gypsum and a magnesium source if you aren't using compost. Compost will have mag but not much calcium. You need calcium. Plants consume a lot of it.
I checked and didn’t notice thrips. I just watered her with compost tea that had 6 tablespoon molasses to 4 gallons water. If that doesn’t help next watering I will try synthetic CalMag.
I don’t want to break my organic grow but I have heard claims from a commercial grow of synergy from using both organic and synthetic nutrients.
 
Homesteader

Homesteader

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Use gypsum for calcium if it is soil. Works excellent and a better option for you. No more molasses though. Seems unnecessary and you may throw off your nutrients
 
mysticepipedon

mysticepipedon

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I checked and didn’t notice thrips. I just watered her with compost tea that had 6 tablespoon molasses to 4 gallons water. If that doesn’t help next watering I will try synthetic CalMag.
I don’t want to break my organic grow but I have heard claims from a commercial grow of synergy from using both organic and synthetic nutrients.
I am quite sure that isn't thrips.

I'm no expert on pests, but I've become an expert at recognizing thrip damage, unfortunately.
 
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