About fertilizer, I would try and go organic, for one it means that if you overdose or don't feed enough it will be easier to correct and if you want to use the area again you can do so more easily without possible complication from left over salts in the soil. Try BioBizz three part nutrient system, its organic, you get a shit load of it, alot of UK growers use it to good effect. If you do decide to do it just get the Grow/Bloom/TopMax and add it to a watering can or however you go about watering your plants.