giving your seedling roots a head start

so you know how when u leave em in a windowsill when theyre in solo cups they stretch a whole bunch, well i filled the cups about 2/3 full, then when they stretched i filled rest of the way, makin em a bit shorter, then that main stem thats under the soil can sprout roots form it, i did it this time around and they seem to be doin well, any input if this would be beneficial?

you can bury them all the way up to the first set of leaves....

sure man, im positive cannabis has adventitious roots, thats a good idea for a number of obvious reasons

good luck homie