Posted: 07/08/2013 at 18:21
To give you an idea of plants for different soil conditions here are a few to help you. If as Welshonion says you see Rhododendrons in neighbours gardens, you have acid soil - they will not survive in alkali soil.
Acid loving plants: Rhododendron, Camelia, Heathers (a few winter flowering varieties can accept alkali soil - ask when you buy), Pieris are happier in acid soil, Magnolia, Lithospermum, Calluna.
Plants which will grow in alkali soil: Astilbe, Penstemon, Hosta, Forsythia, and most other herbacious plants will tollerate alkali.