Can you feed rhododendrons and azaleas with sulphate of iron applied as a powder to the soil?

yes you can, but being from a nursery specializing in rhododendrons i can tell you that there's not much better of a commercial fertilizer available for Rhody's than espoma brand holly tone, it is made up of allot of organics(for those concerned) but it has a high nitrogen content and is low in potash ----rhododendrons like acidic soil and they are very shallow rooted so using holly tone puts nutrients right to the plant and it has a good soluble makeup...blanco

Can you feed rhododendrons and azaleas with sulphate of iron applied as a powder to the soil?
This may be an urban myth but an iron nail inserted to the root of the plant will provide colour not to sure about nutrition
Reply:Dont know.put teabags used ones near roots,they love them,thrive and grow great
Reply:Yes you can. Those two like acidic soil. Iron Sulphate will only keep them green. I use aluminum sulphate instead though.