No one can properly answer that question without knowing what type of soil you are growing in. Tell us that and we can give you better advice.
But you should never give nutes to a plant that small growing in soil. Now, what type of soil you are growing in will determine when to start feeding nutes.
Since you have compost it might make it through vegging without needing nutes, just feed it once you start to see light deficiency ( yellowing) or mabey after a month or so and some good growth.
Once you see the cotyledons yellow time to feed. I'd star at 1/4 strength and move up accordingly. Better to start smaller and work up than burn the hell out of your plants.
Yeah sounds good. Just slowly step it up like every other watering or every couple of waterings. Once I start up on nutes I look at how much it grows and if it grows a couple nodes or is starting to yellow I give it a little more until I get to full strength then I just keep it at that for every other watering till I switch over to flowering.
Thank you for all you're help. Also it says on my fert, half a teaspoon per gallon for 1/4 strength, can i just add less than half a teaspoon to a spray bottle or do you need a watering can?
You can use whatever you need to to get it to your plants, might be a different concentration that you'd need if you are foliar feeding though ( spraying the leaves).
Right so if i use the spray bottle, given its diluted properly, do I just spray the plant? im sorry for all the questions, I just want to make sure I do everything correct. Thanks for all the help given
Yeah you can spray the plants leaves and feed them that way but you'll probably need to water them with the nutrients too. People usually foliar feed as an extra on top of regular feeding