Nutrients on day 21?

It's day 21 and I noticed that my biggest plant is showing light green leaves and I was wondering if I should give it its first feeding because I'm thinking it might be due to nitrogen deficiency, but idk I'm pretty new at this. I'm using potters gold soil with RO water only. It's in a 3 gal smart pot. Any suggestions on when I should first feed her?

Looks ok to me. It won't hurt to give a 1/4 strength hit of nutes.

Be careful with the RO water you will see calcium / magnesium deficiencies down the road, she is still good with out feedin. But I agree 1/4 str nute feeding wouldn't be a bad thing.


these are in potter gold at the moment and haven't been fed anything but water / microorganisms for the soil,

Okay, I plan on watering tomorrow so I'll give it a shot! And do you happen to use led?

breakdancer0003 said:

Be careful with the RO water you will see calcium / magnesium deficiencies down the road, she is still good with out feedin. But I agree 1/4 str nute feeding wouldn't be a bad thing.

these are in potter gold at the moment and haven't been fed anything but water / microorganisms for the soil,

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^^^what he said. Especially the watch for calmag deficiancies. Very common and especially in RO water.

StickyKitty said:

do you happen to use led?

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I am vegging / cooking my finishing soil with 3 600 watt mars hydro leds, I will add 2 1000 watt hps and the CO2 scrog nets when it comes time to flower but that's a few months away.

As a bonus the extra soil keeps humidity and temp up in the winter time

breakdancer0003 said:

Be careful with the RO water you will see calcium / magnesium deficiencies down the road, she is still good with out feedin. But I agree 1/4 str nute feeding wouldn't be a bad thing.

these are in potter gold at the moment and haven't been fed anything but water / microorganisms for the soil,

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Clean that tent up!!

Doomhammer69 said:

Clean that tent up!!

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True, Its rough when trying to turn the soil with a pitchfork, I need a larger container but yeah its a pig sty at the moment