No matter how fastidious you are with your plants, there will be a residue of pests and/or diseases in your pots at the end of the season. Many of these come equipped with protective mechanisms that allow them to survive the winter and rise to infect your plants next year. Cleaning everything ready to make a fresh start in spring is time-consuming, but worth the effort.
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Desert Botanical Garden
Phoenix, Arizona, USA
Vallarta Botanical Garden
Vallarta, Mexico
Pukekura Park
New Plymouth, New Zealand
Humble Administrator's Garden
Suzhou, China
Royal Botanic Gardens, Kew
Richmond, United Kingdom
Medellin Botanical Garden
Medellin, Columbia