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Leaves curl up and yellowing

DEATRstarted grow question 1y ago

Beginner question, as usual (first time growing anything in my life tbh). My 2 plants don't look too healthy, especially one of them. Leaves curl up and yellowing (or not, I am not sure). What am I missing? Thanks!

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Leaves. Curl up

Leaves. Color - Yellow

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LSchnabelanswered grow question 1y ago

You’re giving them too much light for their stage of life. That SF2000 should be anywhere from 18-24” away running roughly 50%. I don’t always trust the light manufacture settings and that is why I have an Apogee PAR meter to test my light output. You can achieve the same results with your phone downloading a PPFD App and testing it. Right now you want to be roughly 300-400 PPFD I hope this helps.

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Scrubbyjimbobanswered grow question 1y ago

They're looking pretty good to me. Your light does appear REALLY close though. If you're using the SF2000 you list in your diary, they recommend a hanging height of 24 inches for seedlings @50-75% power. Could be causing some early heat stress but it's not real advanced yet.

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