When Do I Begin Fertilizing My Plants?

Wait till about week and a half to 2 weeks before feed and add just a taste. Nothing strong. Very week solution. If autoflowers your nutrition demands are lower across board. Less is better

What is your plan with the plants? will you transplant them in a bigger pot later on or are you gonna go through the whole growth in those? If you're transplanting to bigger pot then wait until the first set of leaves had fully matured (second set starts to grow) then give them a 1/4 of recommended amount of fertilizers in every other watering until transplanted, once transplanted start giving them 1/4 strength fertilizing with slow increase as the plant matures If you're leaving them in that cup then I'd start fertilizing once the first set of leaves had fully developed and with a 1/4 of recommended dosage. Give it a slow increase as the plant matures. Hope this helps! Good luck and happy growing :)

I would second what Nor_Cal_Kannabliss wrote, but would suggest quarter strength. It is far easier to treat a slight under feeding than it is to rescue an over fed plant. Just remember, baby plants need baby feeding and not 5 course meals. Hope this helps,..... Organoman.

This depends on your grow medium. Is it an ammended soil? If so not till the third week after transplant. If it's not an ammended soil I'd start feeding at 1/3 str when it hits a 3 leaf. 🤘😤