Thanks to everyone for the encouragement and advice! Not at all going to give up. With the exception of maybe a couple seedlings, all seem like they’re still alive, though not ideally LOL.
A big mistake was not thinking from the start in terms of hydro/coco so I’m now doing so and will feed/water accordingly. And my light is 630 watts from the wall. If the Photone PPFD meter app works well I should be able to much better dial in light output…
That’s exactly what I’m going to do @Joker. I was thinking of this first grow in more “production” linear terms which is ridiculous. Two groups of seedlings are due for watering over the couple days and they’ll be given their first feedings at varying strengths.
Exactly @ShiskaberrySavior - let me see if I can at least nurse a handful of the 18 seeds that were popped back to health and into proper vegging.
To wrap my response up, I was watching a grow advice podcast last night and was emboldened when one of the participants just happened to mention “3 week old plants still looking like 1 week olds” in the sense of needing a feeding to jump-start growth. At this point I’d be super-stoked if just a few make it over the finish line to provide decent smoke. Not over just yet…