Exodus cheese auto/femi from ghsc

[birdy]

Hi guys I need your inputs.. I'm growing exodus cheese auto/femi under 300watts leds full spectrum with soilless mix 50:50 ratio of coco/perlite/verumulite since they germinated they r still in same 20 gallons pots were I see them growing slow they took 4-5 days to germinate in paper towel method, out of 5 seeds only 4 germinated,early seedling was green n healthy but by the end of seedlings they were turning yellow from the bottom, I was thinking its to early for seedling to have nitrogen problems. Ph is 6.4 regular tap water, I flushed to eliminate root problems, water drainage was perfect not to fast not to slow,still my plants were turning yellow I was going nuts...this is day 10 from germination then I decide to risk I gave then mild urine diluted with water in the ratio of 1:20 after 2 days I c some good signs they look healthy not the way they were looking with leaf ends curling with whiteness on the tips, I was relived then after 4 day I gave them same urine fertilizer with same ratio it's going good but I feel it's growing slow coz of the stunt which they had... Plz help me improving growth.

[mopman]

The way you explained the leafs curling and burnt tips sounds like your nute's were to strong. You already gave them a flush, I reckon give them another flush and start feeding again but start off with a weak nute solution and work your way up from there.