When should I worry

I’ll end up running the rest of my wedding glues but I had high hopes for mephisto

Just as a point of interest and not saying this is the way to do it, but how I do it. I start my seeds (Auto or pheno) using the paper towel method. Usually it takes about 3 days but sometimes as fast as 2 days, to get a sprout and 4-5 for it to be long enough to place in the soil. You said that you planted it knuckle deep and imo that is too deep. Even doing it this way I plant with the head of the seed on the surface and the sprout buried.

Millo said:

There shouldn't be much difference, however I would still aim for some dark hours so I'd say go with 20/4

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20/4 worked best 4 me too,shame about mephisto I found them to be one of the best.

Update: 2 of the mephistos sprouted with just one not doing anything. The fast buds has really taken off but the other two are barely growing. One just broke dirt yesterday and is still just barely out of the dirt

zeusman95 said:

Update: 2 of the mephistos sprouted with just one not doing anything. The fast buds has really taken off but the other two are barely growing. One just broke dirt yesterday and is still just barely out of the dirt

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Had 2 out of 4 mephisto seeds not pop. Dunno if they are old or incorrectly stored but I’ve not had 1 fastbud seed be a dud

Have you tried sprouting in a paper towel in a plastic bag? Throw it on the windowsill and you should have a tap root in 2-3 days. Just be careful pulling it off the paper towel because sometimes the tap root wants to stick.

also plants grow the most at night. So although you can grow with lights on 24/7 you’ll get faster growth if you give it some night.