i grow in coco myself pal but when you feed them feel the weight of the pot when its dry and give them a small drink then wait till its dry again i had the same issues when i first started thats why i started my seedling in solo cups then onto the main pot just try not to over think stuff if you give them light and water they will grow just keep it simple and in soil you dont need feed all the time depending on the type just water as far as i know