I'm a first time grower. I got purple stem between cotyledon and first set of leaves. They only 9 days from sprout. Ph 6.5 No mute yet. Ocean forest soil. NL seeds. It's only on 6 of 10. Leaves are green. Do I even need to worry?
I wouldn't worry, your plant looks good. Two of my plants had a purple stem from the soil to the cotyledon for the first 3 weeks or so, now they are nice and green.
I'm not sure what sex they are I got 10 NL. But 6 of the 10 got purple. Not to concerned yet but don't need no BS wit em later on down the line. Someone said it could be a magnesium uptake problem. But they all should be like that then not just some of em.