if your stuck for fertilisers and your vegging you can use your own piss at a 10-1 ratio 10parts water 1 part pee, it's organic and safe and i know lots of people will say it's a horrible thing to do but the plants love it it's free and it works like a charm, this maybe unheard of to you? but just incase it is i can assure you that it's been being done for hundreds of years and is a proven source of nutrients, i've used it myself and wouldn't hesitate to do so again. just a thought mate incase you are in the position of needing an alternative, piece of piss as they say lol