r/FirstTimeGrower

From some reason I struggle with seedlings
Using soil with perlite
Humidity at 60
Temperature at 77
PPFD is around 250

Could anyone confirm if this is nutrient burn or a calcium deficiency

It's only appeared on a couple of fan leaves.

25 days from sprout 🌱 in soil . Seems pretty stunted. Too much stress on the plant ? Or will it have potential when it pre blooms. Blackberry auto.

First time growing anything , all 3 are Donutz photos from humboldt seed co. Planning on moving the two in the cups outdoors once i transplant them due to lack of tent space. Any tips or recommendations im wondering how its going so far are they doing good?? Open to feedback/criticism/and or questions