i too am growing in england and i reckon my plants are starting to flower now,i've been feeding mine chemical mixtures as i've had a lot of succuss growing indoors with them(average 4 oz per 3 foot plant),though if you want organic go with blood and blood meal,ones better for veg and 1 better for flower but can't remember which,also some natural mollasses in your water from time to time in your water wont go amiss either,especially in flower