Why this size for so long Sometimes longer than two weeks before they really start too shoot up? Most of my other seedlings have no issues like this.Northe

Looks far to wet your soil far to wet

Seedlings sprout and produce a tap root. That tap root burrows down deep into the soil and anchors the seedling. Then from there roots begin to develop off the tap root. While your sitting there scratching your head wondering why the fuck your seedling hasn't grown at all for the first 2 weeks, rest assured, whats happening is happening as i described, but under the soil where it can not be seen. Seedlings need to establish a root network before they can begin growth. This is the process that is happening while you're scratching your head.... Just don't do what most growers that are new do and over water it. They need just a light dribblets of water around the perimeter of the stem. Do not get any water on the base of that stem or you risk damping off which will kill it. Soil on the dry side, a little light, and little warmth, and a nice humidity like what your showing, and she'll be just fine. No need to feed her the first 2 weeks either. The seedling comes with everything she needs to get established. After that, it's all you baby!

This looks like it's 1-2 days old. 2 weeks. Id be looking to be taken the 1st set of 1 fingered leafs & 1st sets of nodes by then. Its way to slow. You need to readjust. Also your light what's your lux? Ph/ what do u feed at the start. As that's coco. U need feed from the jump.

Low temps mixed with low RH. Are you using any stims, enzynes..seedling starter nutes. I can tell your PH is to high You need pre treat that coco core right? As it holds salts and cam throw ph.

theres most likely something off in your conditions pal. I dont really use F but im sure the temps are fine some autop strains can take longer if you are growing autos this might be what other than that over watering can cause slow growth alot of things can actully. double check parameters air flow temperture your water it could be anything :) Best of luck anyway buddy and if you need anymore help hit up my dms :) always happy to chat about growing :)