It is important to know the pH of your soil before you plant. Some plants prefer more acidic soil (lower pH) and some plants prefer alkaline (higher pH). Home testing kits are readily available and are easy to use.
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RHS Harlow Carr
Harrogate, United Kingdom
Desert Botanical Garden
Phoenix, Arizona, USA
Lalbagh Botanical Garden
Bangalore, India
Gardens of the Generalife, Alhambra
Granada, Spain
Kenrokuen Garden
Kanazawa, Ishikawa, Japan
RHS Garden, Wisley
Woking, United Kingdom