LEC CMH leaf deficiencies

The leaves are all droopy and yellowing followed by brown spots on the leaves. This happens when the introduction of the CMH happens. Switching fully to CMH but want to know how to remedy. This has happened on the last 3 runs. Even though the plants look like crap they still finish better than my HPS
Switch from 250mh in veg to 315cmh then 630cmh in flower
Still trying to figure out how to correct it.
630cmh 3’ From canopy.
Soil DNC and 1/3 perlite,
Recently added to soil - dnc earthworm castings, oyster shell, langbeinite integrated with soil via recommend dosage (Added these to remedy) still having issues.
Past Nutrients GO calmag and Biothrive
Jamaican guano (still had problems, all recommended dosage and feeding schedule)
65-75 temps lights on - lights off
50% rh
PH 6.5-7
Different strains, all with the same problem except c99 strain

Pics?

Whats your water source/quality?

if its yellowing all over then it could simply be that there is not enough available in the soil or a lock out.
I don't think its light or pathogen related. (but im no expert)

Renfro said:

Whats your water source/quality?

Click to expand...

Well water. Not city. No chlorine or fluoride.
MH and HPS no problems with current water. The only difference is the CMH lights

Whats levels your humidity at ?

Lucky Luke said:

if its yellowing all over then it could simply be that there is not enough available in the soil or a lock out.
I don't think its light or pathogen related. (but im no expert)

Click to expand...

I’m wondering lockout as well. Did a ph slurry test and I’m right on 7 maybe a little lower.

fully#sick said:

Whats levels your humidity at ?

Click to expand...

40-50 flower like it always has been with HPS

In low humidity plants don't take up enough food so you need to feed heavier to keep them from starving

You got a brix Meter

fully#sick said:

In low humidity plants don't take up enough food so you need to feed heavier to keep them from starving

Click to expand...

yeah I agree, think the organics just isn’t enough nutrients for what the CMH demands.

fully#sick said:

You got a brix Meter

Click to expand...

Nope sure don’t, Tell me more

zeus2025 said:

Nope sure don’t, Tell me more

Click to expand...

Brix is a measurement of nutrient density in.plant sap. You use a refractometer and a garlic press to swish the juice from a leaf a check the levels on the refractometer

zeus2025 said:

yeah I agree, think the organics just isn’t enough nutrients for what the CMH demands.

Click to expand...

Its up to you to make sure the foods there and available dont matter if youre organic or not. Like having a savloy in the freezer, its no good to any cunt if you can't eat it

What are you adding for N?

FWIW I have same strain running under DE HPS and CMH (both 1kW) and they eat the same. I don't believe that CMH requires a stronger or different feed than HPS. Perhaps the soil pH is off or something.

You mentioned well water … Chances are it’s hard water. Hard water can cause lock out for the nutrients. What is the ppm of the well water out of the tap ?

You may want to consider an RO system.

AmericanGrower508 said:

What are you adding for N?

Click to expand...

Earthworm castings as a soil mix and top dress before flower flip. GO bio thrive and GO calmag+ previously and on the photos added earlier.