LEC CMH leaf deficiencies

[zeus2025]

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

 

[Renfro]

Pics?

 

[Renfro]

Whats your water source/quality?

 

[Lucky Luke]

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)

 

[zeus2025]

Pics?

 

[zeus2025]

Whats your water source/quality?

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

 

[fully#sick]

Whats levels your humidity at ?

 

[zeus2025]

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)

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

 

[zeus2025]

Whats levels your humidity at ?

40-50 flower like it always has been with HPS

 

[fully#sick]

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

 

[zeus2025]

Pics?

 

[fully#sick]

You got a brix Meter

 

[zeus2025]

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

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

 

[zeus2025]

You got a brix Meter

Nope sure don’t, Tell me more

 

[fully#sick]

Nope sure don’t, Tell me more

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

 

[fully#sick]

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

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

 

[AmericanGrower508]

What are you adding for N?

 

[Renfro]

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.

 

[digging]

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.

 

[zeus2025]

What are you adding for N?

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.