Hello they have had it courgette are hungry plants the market garden I worked at use to grow 2000 plants we put 3inch of mushroom compost in to each bay and rotavator then 4oz to square yard of grow more each plant was put on a slight mound with a plant pot at the side to water the roots then after 6 weeks we started twice weekly feeds of liquid solinure then picked twice a day some got mildew they got pulled out end of September first frost took the whole crop down they were a slimy mess jezza