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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Missouri Botanical Garden
St. Louis, Missouri, USA
Keukenhof
Lisse, Netherlands
The New York Botanical Garden
New York, United States
Aswan Botanical Garden
Aswan, Egypt
Royal Botanic Garden Sydney
Sydney, Australia
RHS Garden, Wisley
Woking, United Kingdom