Masterblend 2-2-1 Mg deficiencies under LED

Wandering81 · Apr 3, 2022

Anybody seeing MG deficiencies with the usual 2-2-1 masterblend ratio, in coco under Samsung Lm301 LEDs? 2-2-2 seems to be the better ratio under high powered LEDs. At least, that's what eyes are seeing round these parts..

mysticepipedon · Apr 3, 2022

LEDs seem to cause a greater demand for Mg.

Wandering81 · Apr 4, 2022

mysticepipedon said:
LEDs seem to cause a greater demand for Mg.

Absolutely. Which is why the 2-2-1 may not be optimal for LEDs. Has anybody had the 2-2-1 work under LEDs?

Backyard_Boogie · Apr 4, 2022

Throw in a couple UV reptile bulbs the problem will go away and if not then at least dramatically lessen.

Wandering81 · Apr 8, 2022

Backyard_Boogie said:
Throw in a couple UV reptile bulbs the problem will go away and if not then at least dramatically lessen.

Im definitely going to try that. Thanks, that's a great idea. I think I may even have some lol.

Wandering81 · Apr 8, 2022

I've been using full strength jacks 321 for the last year and half under the same LEDs. Those ladies turned out great. According to this chart, in order for Masterblend to basically mimic Jack's, it would require 3.5 grams of Epsom per gallon.

Shaded_One · Apr 8, 2022

Was going to recommend Epsom

phxazcraig · Apr 8, 2022

mysticepipedon said:
LEDs seem to cause a greater demand for Mg.

Can you expand, or point to some info on this? I'm seeing some issues with leaves only under the brightest lighting - leaves lower down have no issues. Looks like some sort of cal/mag thing brought out by the light being either too close or too strong or both. Not sure how to treat it. (Can't raise the light, but can dim it more.)

mysticepipedon · Apr 8, 2022

phxazcraig said:
Can you expand, or point to some info on this? I'm seeing some issues with leaves only under the brightest lighting - leaves lower down have no issues. Looks like some sort of cal/mag thing brought out by the light being either too close or too strong or both. Not sure how to treat it. (Can't raise the light, but can dim it more.)

I can expand, but it's just personal observation.

When I got Mg deficiency symptoms in lower leaves, the lower leaves would burn between veins, where the chlorosis was. The parts of the leaf shaded by upper leaves did not burn.

Masterblend 2-2-1 Mg deficiencies under LED

Masterblend 2-2-1 Mg deficiencies under LED

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