Deficiency or burn?

Bellaphant · Mar 14, 2021

Hi,

I have three plants vegging, 2 Mazar and 1 Granddaddy Purp.

One of my Mazar is getting burnt tips graduating into yellowing middle leaf then green at the base. I know I’m either nute burning or not feeding enough.

I am using advanced nutrient perfect ph - micro, grow, bloom. Following the bottle instructions, feeding every 4-5days with some water in between. I also add in some cal mag, pH level is close to seven, in a soil substrate. They are under a 150w hps and a 300w led.

Any help would be appreciated.

Photo explanations:

1. photo of grow setup
2 and 3. My Grandaddy Purp with yellowing leaves - I’m thinking underfed
4-8. My Mazar with burnt tips, not sure if nute burn or deficiency.
9-10. Another Mazar but with much less yellowing of leaves.

hotrodharley · Mar 15, 2021

Potassium deficiency. Lower pH to around 6-6.2. Increase your feeding frequency if it appears again.

Bellaphant · Mar 15, 2021

hotrodharley said:
Potassium deficiency. Lower pH to around 6-6.2. Increase your feeding frequency if it appears again.

Amazing, thank you very much!

Deficiency or burn?

Bellaphant

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hotrodharley

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Bellaphant

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