thats the problem, its impossible to transport all that soil to fill in such a large plot. Im planning on using the soil that is already there which is nice and light and im sure will have some nutrients in. Ill have to compromise and mix in some kind of fertilised soil with what ive got and add a light nute feed later once the plants are a bit older. I had decent results using bio-bizz adding it a just under once a week. I know they could use more when they're in their prime but thats the only realistic amount of times i can visit. Im going on budget and how easy it is rather than what's best for them. Hopefully theres gonna be over 20 plants so its quantity over quality haha. Thanks for your help!