My Plant Food

i use Schultz 10-15-10 Liquid Plant Food concentrate. it is a multipurpose formula that i can use on all of my plants (including my indoor plants). for the seedlings i dilute the fertilizer by half so it is not too strong for my seedlings. in a spray bottle i put 2 drops in 500ml of water and use it every time i water (as per the instructions). for my mature indoor plants i use 7 drops per liter every time i water.