What deficiency is this?

Hi everyone. I'm in week three flower. Ec 1.2 ph 6.

Why is my leaf gone yellow? Or what deficiency is it? Thanks for any help. Growing in perlite under 700umols

Nothing looks healthy in that picture. Powdery mildew or did you spill flour on your flowers?

Porky101 said:

Hi everyone. I'm in week three flower. Ec 1.2 ph 6.

Why is my leaf gone yellow? Or what deficiency is it? Thanks for any help. Growing in perlite under 700umolsView attachment 4508427

Click to expand...

Looks like nitrogen deficiency to me, pick it off and throw it away. Do nothing about that.

You need to get rid of the pm and get your humidity in check.

Porky101 said:

Hi everyone. I'm in week three flower. Ec 1.2 ph 6.

Why is my leaf gone yellow? Or what deficiency is it? Thanks for any help. Growing in perlite under 700umolsView attachment 4508427

Click to expand...

Whats the white stuff all over the leaves? Thats what im worried about.

Porky101 said:

Hi everyone. I'm in week three flower. Ec 1.2 ph 6.

Why is my leaf gone yellow? Or what deficiency is it? Thanks for any help. Growing in perlite under 700umolsView attachment 4508427

Click to expand...

Powdery mildew... Pretty bad case

yes its pm.

Im just wondering what the deficiency is.

You say its nitrogen, but its yellowing from the inside not the outside?

Porky101 said:

yes its pm.

Im just wondering what the deficiency is.

You say its nitrogen, but its yellowing from the inside not the outside?

Click to expand...

It’s magnesium because it’s interveinal.

You’re not planning on smoking that are you?

Trying to correct the Nitro, or whatever nutrient problem you're having, is like trying to make sure the oven is turned off once the house is already on fire...tend to the fire, in this metaphor the fire being the PM, and then you can get back to tending to any nutrient disorders. A nutrient problem like that is slow progressing and is not nearly as immediate of a concern as the severe case of PM you're experiencing. I'd be scared to even smoke that bud even if you do stamp out the mildew, honestly....especially for someone like me or many other medical MJ users with immune system disorders, a mold contaminated bud could spell out real medical problems.

I'm with others that the first issue that needs immediate attention is the PM. In fact that is so covered in PM I wouldn't bother with it. I'd put that in a garbage bag and then into the trash.

Yeah unfortunately that plant is not worth saving...I hope you don't have a roomful of them like that. Not only should you get rid of the plant, but the soil, the container, and anything associated with it. Then start cleaning.

Just went through this myself, twice, and I now have healthy plants with a good IPM program in place....knock on wood!