Posted: 05/08/2014 at 08:47
You garden on limestone ? The lime content will eventually overwhelm any acid compost you add.
I would be inclined to use ericaceous mulch around the acid lovers only and plant only plants suitable for your soil.
What acid lovers are you growing? Are they in a raised bed?
My soil is neutral and I went through the acid lover phase. Made raised areas for summer heathers, pieris, andromeda, azaleas, etc. They did well for couple of years. I used flowers of sulphur to lower acidity and sequestrene. Now I grow acid lovers in pots, Camelias still in the ground because they are more lime tolerant, and borderline like raspberries and lupins have a couple of sprays of Epsom salts.
You can grow dwarf Rhodos, azaleas, etc in pots buried in the ground