ok first the info. There are 16 seedlings in the same exact environment only 3 showing this. All 3 are different strains and have others of each strain that arent showing this.
Lighting is 4ft 8 bulb t5 about lil under 18 inches above with veg bulbs.
Temps staying at 79-80f
rh 45-65%
Have not been fed yet only phed clean water at 6.2-6.4.
Soil is promix garden potting mix (red label 2 cu ft bags walmart) it is amended i will list.
Being as the soil is a mix claiming ready to go i only added half reccomended amounts of these amendments. Soil mix ph rests at 6.1 after amending and moistening and sitting a week.
Added was 1/2 reccomended amount of following
Down to earth vegetable garden fertilizer 4-4-4
Epsom
Food grade gypsum
Black sand
Malted barley
Worm castings
Kelp meal
Azomite
Then full amount of
Mykos
Perlite
There is spotting almost like calcium def but not sure. These are a week from shells coming off em just want to get straight now as i see the issue now.
Pics
It is unlikely it is nutrient deficiency at that age. A seed contains everything the plant needs to get started. The soil looks over watered, let them dry out a bit and LITFA.
Also, they need a dark cycle. Get a timer on 20/4 or 18/6
Yeah 6.2 ph is the low end . Im gonna let em dry out good then ill move the ph up some on my watering. The soil is set at 6.1. So going a lil high should fall right in range. I was trying to aim for that everything available ph.