These are leaves from Rhododendron ‘Gomer Waterer’ which has been giving me grief for a number of years. While it has grown and bloomed well since I first planted it about 7 years ago, the leaves have been an ongoing problem. They come out fine but as the weeks go by, they lose the green colour between the veins and eventually become desiccated and develop brown patches. Although this rhodo was growing in an area where 2 others grow very well, I moved it to a new spot this spring. The soil contained a generous amount of compost, amended with well-rotted steer manure. Gomer Waterer is supposed to tolerate quite a lot of sun but I put it where it gets more protection from sun and wind. There was little if any root disturbance in the move so I let it bloom this May. This year’s leaves came out looking perfect but soon began showing the same netting pattern as before. I don't think this is a disease problem but a nutrient deficiency of some sort. In late May I gave it a couple of gallons of Fish Fertilizer; waited, but symptoms persisted . . . then another gallon of FF; no change . . . then I tried about cup of Blood Meal around the drip line but have seen no improvement. At some point I gave it a good fist-full of Epsom Salts and sprayed the leaves with Chelated Iron. I try to wait a week or two between adding anything to allow time to see what effect the previous one might have. Even rhodo experts in my local rhododendron society have no other suggestions. As far as the garden goes . . . we’re in Zone 8a on the south side of a rocky hill with intermittent shade from large Garry Oaks and Arbutus trees. Rainfall is very low but supplemented by an irrigation system and hand watering. I have about 60 healthy rhodos and decades of experience growing them here and in other gardens. Should I show Gomer Waterer the door?