oh for nuts and stuff
usually for miracle gro its 1 teaspoon for 4litres (indoors) or 5ml
get a 2L bottle, put a teaspoon of it in there along with other shit u wanna feed ur plant with (liek urine ), mix, then put it in the spray bottle.

Then every so often (3 days for me) I spray the plant. I usually spray until the top layer of soil is moist with the mixture. And I mean moist as in you cant feel any water running through the soil, damp in other words.

Its also handy for pesticides and such esp. for spidermites.