A white azalea? I think you must have acid soil in your new garden, with all those azaleas and the pieris.

Thanks Spritzhenry for all your lovely comments and replies. Really appreciate it. The garden is in Hythe, Southampton. We have hard water down here? The garden isn't new - it's very very old I think, everything is completely overgrown but I really want to help it and keep as much of it as we can (we are developing on the site, so the original house is being replaced with three houses, one of which will be ours. But to bull doze the gardens, well I couldn't watch. Trying to save as much as poss