What is wrong with my camellia?
I agree that a deficiency in soil moisture is the most likely explanation, and that ensuring the bush is well-watered is the most likely cure. The bush should be getting 6 gallons of water a week and if there is inadequate rainfall, then you must maintain that level. Camellia are plants that grow on forest margins. Thus they naturally grow in leafmould, which is a moisture retentative medium. To dismiss some of the previous answers: 1. if it was iron deficiency, then the leaves would show a solid yellow colour with dark green veins 2. If it was lime induced chlorosis, then this would show as for iron deficiency, because the lime is locking up the iron and making it unavailable to the plant for the manufacture of chlorophyll.