We have no lawn in our zone 10 coastal (socal) garden!!! We do have a variety of trees and shrubs including several acacia and eucalyptus species, flax/phormium, agave, dracena and Australia tea trees. The soil drains very well, the yard gets full sun and there is a lot of compost in the soil. Drip is our only source of irrigation. We use organic methods to improve soil fertility, manage pests and viral diseases. Our problem is that the 20+ flax/phormium that are growing in a drift on a mild slope in our garden and are looking sort of ragged. What's wrong? More nitrogen, more water, too much sun, pruning? Thanks for any advice you can offer.