Northern Lights Brown Spots

Northern lights about 3-4 weeks old in pro mix and just watering. Cfl lighting, no nutrients. Brown spots starting, what could it be?

Calcium deficiency. Start feeding, and add some magnesium and calcium.

MarieScott2100 said:

Northern lights about 3-4 weeks old in pro mix and just watering. Cfl lighting, no nutrients. Brown spots starting, what could it be?

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She's starving. You don't need to supplement calmag. (If you use RO water which has all the minerals removed, you should add a minimal amount of calmag to replace those minerals. But, otherwise, you need to feed.).

Pro-Mix has no nutrients. Just enough for the first seedling week.

That spot is calcium def, but the plant is deficient in everything. Feed it a complete nutrient. You will see the color change quickly. You need to feed it every watering.

BTW, you posted enough of your finger in that hi-def picture that someone could run your print.

nomofatum said:

That spot is calcium def, but the plant is deficient in everything. Feed it a complete nutrient. You will see the color change quickly. You need to feed it every watering.

BTW, you posted enough of your finger in that hi-def picture that someone could run your print.

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How do I remove the picture ? There is no edit option