Derek Jarman's GardenParadise haunts gardens, writes Derek Jarman, and it haunts mine. Jarman's public image is that of a film maker of genius, whose work, dwelling on themes of sexuality and violence, became a byword for controversy. But the private man was the creator of his own garden paradise in an environment that many might think was more of a hell than a heaven in the flat, bleak, often desolate expanse of shingle that faces the Dungeness nuclear power station.