It's a skill that comes with time and patience.. To give it a quick kick of nitrogen. Blended leaves(trim) compost, don't know what you have I could go on all day, I prefer alfalfa with the triacontanol that's present amongst other minerals etc... Fish, blood, bone no to much to start with top dress with more start of stretch, guano is a good quick source p/k.. Worm castings. Frass. Nspb, em1, blended dry calci worms, lactic acid, Fulvic/humic acid, compost teas, ferments... Loads of stuff but don't go adding shit tons of stuff you don't know or learn whit it is it does and reacts with other things and timings on when to add... Or get new soil and stick to 1mll per 3 bottles of salts and know what's in the soil or an idea instead of shooting blind but again that's how you learn but expect problems to start.. Good luck ✌️💚