fertilizing seedling

should i wait for cotyledons to fall off before starting nutrient regiment?

I wait till the first set of real leaves develop, and start with very weak nutes...

you should wait about 4-6 weeks before you give nutes to your plant or youre going to damage it

If ur in soil do not add anything. In hydro add very little, I'm talking minuscule ammounts of base nutrients. Safest bet is to just wait for her to tell you shes hungry rather than trying to force feed her.

My seeds come with free food for 2-3 weeks

but not you,...?

i dont know about all the people above but my water comes out at 80 ppm. And i run soiless, the op hasent stated if hes in soil or soiless. If its soil you shouldnt have to feed for two or more weeks. If its soiless you need to know what your tap ppms are at but you should be adding something after a week and the medium should be wet with low ppm solution. And if its hydro id also wait a week and then start feeding low ppm top fed with a syringe.

I forget to add some nutes to my last batch of seedling, damn, they stretched a lot and some of them had burned tips! I soaked them in a .5 ec nute solution and they bounced back. Im running in rockwool tho, if you growing in soil , you dont need to feed until first stage of true leaves.