Seedling leaves curling down with dark green spots

saavvy

Member
Hi everyone,

First time growing cannabis. Medium is coco coir. I noticed my indica seedling starting to show dark green spots on leaves. This is what I have done so far


9/25 8:00 PM seed placed in glass filled with room temp water and allowed to sink to the bottom after a few hours by gently tapping. Ambient temp 21-25C, low light

9/26 11:30 AM seed did not “pop” but placed in 2 wet paper towel (soaked but not dripping) fold one third over the seed and the other third over that. Placed between two ceramic plates. Make sure plate does not contain excess water. Ambient temp 21-25 C , low light

9/28 seed that was germinated in the days prior placed 1” deep in reptile coco substrate that was hydrated with pH 6 DI water. Used solo cup as “pot”. Did not water because coco is wet/moist at this point.

10/1 seedling sprout breaks coco substrate.

10/4 2mL of pH 6 dH2O. Between 9/28 and 10/4 only light misting with pH 6 dH2O

10/7 40-50 mL dH2O

10/12 40-50 mL dH2O

been doing 18/6 for lights.
I noticed these spots in the last day or two. Have not given nutes and have not given cal mag. I wanted to wait until I transplanted to larger 5 gal pot to charge the coco with cal mag and use fox farms big bloom fertilizer (very low npk).I’ve been thinking it’s under watering as I’ve been very wary of overwatering(maybe to a fault). Any suggestions? I have attached pictures of my setup and the seedling
 

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