overfertilized? light burn?

kwijibud said:

based on this picture, what would your diagnosis be? im thinking overfertilized or too much light....

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laserbrn said:

Looks overwatered. Can you give me some background on your grow? I might be able to figure it out pretty quickly.

What type of system? Ebb & Flow, DWC, etc? currently rockwool on perlite in a seedling tray. going to be doing hempy bucket when roots are more established. (only 1 of 4 plants has roots emerging)

What is your watering schedule? wait til perlite is damp to dry. then water (see below) until about 1cm layer on bottom. about 2-3 days

What kind of nutrients are you using? GH micro and grow

How high is your ppm? 370-400ppm

What is your current ph? 6.5-6.8

What type of lights? 600w HPS approx 3.5ft above plants. temps about 74-79F

And can you please take a pic with the lights off? done.

thanks a million.

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fedar said:

Stop grow nutrients. Check your Ph meter - it could be low Ph. Grow nutrients + low Ph = nitrogen burn leaves. I think thats the problem and curling down leaves becouse of too much water.

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kwijibud said:

ill give it a shot and a flush. the only reason i started adding the nutes was the cotyledons started yellowing right after the 1st leaves came out. thanks

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