I have three Eremophila maculata "Aurea" in the garden, in a bed with a thin layer of rubbishy soil on top of panny clay. The area gets irrigated twice a week and this, in combination with the poor drainage, seems to have all but done for the Eremophilas. They are just about still alive and I am going to move them now, to a deep sandy bed with no irrigation which, I hope, will be more to their liking! Will report back on results.