Lack of growth

Needs very little water loves the dry soil and the warm Temps keep Temps 70 F or so

I had this problems before and always had to do with bad lighting

ph is a bit high, but I use similar water ph from my tap for seedlings and never had an issue. Some seeds are just duds- or you think they are. Lols, Want example? The Bc Buds Hash Plant in my current diary was a runt, out of 4 seeds it was nearly half the size of the rest so rather then give it to my friend with the other 3, I gave him something else and kept it and planted it just to see what happens...It went bananas. Some plants do that, they seem to do nothing for a while then you blink and they bigger. I know you say your not over watering but that is the number one cause of slow growth in seedlings. Recently I heard of a few bad batches of pre packaged potting mixes from some of the bigger names that were either way too hot (too much nutes) or one that had claimed good levels but was shown to have very little in it at all... so id just give it a few more days and see, if its still doing nothing, consider a repot into either a slightly larger pot or same sized cup with fresh soil- that usually fixes most of my slow growing seedlings, not sure why but sometimes they just grow wrong and a repot with fresh soil or a diff type of soil from a diff company or a bit more perlite/bit less perlite ect fixes it. But generally speaking if they look healthy then leave em be.

Hi infamous, from the looks, seems stretchy to me. Check your lights? Hope this helps, Bogart

Most likely, the root is not developed. If the glass is transparent, see if there are roots at the bottom, 17 days, a small glass, he should have already "wrapped it with roots". My advice is not to torture the plant if it is possible to plant a new one. This happens sometimes. The reason can be both in the wrong PH-substrate-irrigation and in poor genetics of the seed. The cotyledons wilted, which means something is wrong with the nutrition, either fertilizers or the root has not developed.

6.8 is too high soils optimum is 6.4/6.5 coco and hydro 5.7-6.2

I'm sure it's growing. You just can see the difference.

Generally such small plants don't need big amounts of nutrients and you say you're not overwatering so it comes down to light and temps- which are both impacted by the distance to the light (also ambient temperature). Make sure that it's not too far away from the light source (check the light specifications for this distance) and around 27-28 (Celsius)/ 80-82 (Fahrenheit). Most likely this issue, but always try and narrow it down by eliminating possible errors. Hope that helps

hard to say with no diary, It could just be a dud seed. or that it needs more light. The stretching is an indicator to me the light is to far away or to dim. Need them photons to generate food and grow. Good Luck!