Me myself mix it into the soil i use an organic liquid seaweed instead of sea kelp that i mix with water. Do be really carefull coz to much mixed into the soil can over nute and kill the plants. I use a bonemeal and a fish, blood and bonemeal mix i also use poulty manure pellets which all are really cheap and easy to get hold off. Start by using it in really small doses is what i recommend. I use a lil bit tomato blooming fertiliser as well this is to get the trace elements needed for the plants for boron etc. I did over nute one of my plants once and it died so please try to use it as small as possible and later can up the dose slowly as the plants get bigger. Try to get a ph kit u can get them relatively cheaply i got one that dont need batteries of around £7. This to make sure the ph balance is correct. Do all of this and get some shooting powder or molasses for the final two weeks of flowering to put the weight on ur buds to make them heavy and dense good luck with ur grow and hope u get some real monsters.My advice mix in with the soil get a blooming fertiliser for the trace ingriedients need for the plants and should be all good but start of really small doses and molasses or shooting powder to put the weight on the buds in the last two to three weeks of flowering.Evil