Ryan - what type's of peppers are your seedlings? My experience over the past 30+ years of starting my plants I've found, for me, that sweets grow faster than other types, then spicy/pepperone type grow the next fastest, hots and then super hots. I stagger when I start my plants (xhots, then hots......) and even with staggered starting times, my sweets usually outpace the super-hots by the time I plant out. Everyone's experiences will differ and over the years people find what works for them. I get a few super-hots that grows like weeds and just deal with it.....

I also grow my seedlings/plants in Miracle Gro potting mix. I usually don't use fertilizers on my seedlings until they're larger (4-6 sets of true leafs) and they show signs of needing a boost. Once planted out, those in the ground will receive bi-weekly fertilizer if they show signs of needing a boost and those in pots usually do receive a bi-weekly dose of fertilizer. I selectively fertilize, thus not to over do it on the plants that are doing fine as is.

Sandy