It's been 1 month and 3 days I transplanted from a solo cup week 3 seedling I think I had light burn and some yellowish leaves not sure why but I raised the light in my 2×2×5 and dimmed it down to 25% the yellow bottom leaves I removed
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Last picture appears to be showing slight calcium deficiency. Bottom leaves shouldn't be yellowing. Are you sure you're watering/feeding enough? Not seeing any light burn.