I’ve used vital earths manna mix in the past it’s not bad soil, not sure about vital organic I found a website for them in Eugene looks like they mix their own soil. As for at that stage of a plant I would have had it in a 7 gal pot already.have you fed it anything other than cal mag? Was it green and better looking a couple of weeks ago. At three gal it’s probably used up the soils reserve. Have you only been doing cal mag. Is the soil your using coco mainly? I wouldn’t water again until it’s dried out really well.
Picked the plants up about 2 weeks ago from a dispencery in town. They used aquaponics to grow their mother plants not sure If that would effect the plant going Into this soil from that. When I first picked them up they looked fine but within a couple days even in the pot it came in I stated noticing the leaves yellowing. So far i havnt fed the plants(Only had them for 2 weeks in fresh soil, assumed the soil would be good for at least the first 2 weeks of nutrients)
It's been 4 days since my last water and the soil is still pretty damp. Planning on feeding them half strength grow and just over half stregth calmag next water cycle to see if that would correct the deficiencies. Didn't add any coco myself assumed that vital organics already dailed the coco ratio into their soil.
Edited my last post with a picture I'd the soil I'm using.