Does anyone have any information on seed banks selling crosses of the "real" purple kush cut? The supposed cut was bred by "K" from Trichome Technologies and got the nickname SR71 for being sold from a dispensary in California with that name.
Just read the last part about the temp, you may want to put a small heating pad in the tent young plants do better in warm, that'll raise the humidity too.
I always water the soil first until there's runoff then plant the seed because the water can make a channel and carry the seed to the bottom of the pot. Then water again again the soil is dry so the roots spread out and search for water.
Your plants look great don't worry about that, if you have to leave for a trip learn how to install a drip system so they'll stay watered! Research blumats as well.
If your nutrient regimen is complete you shouldn't have to foliar feed, studies show it can be beneficial but in a setting like yours I think you should focus on dialing in your nutrients and your environment. Also those lights aren't air cooled so it might be getting hot, hang a thermometer at...