Cacti are easy houseplants to grow on a sunny windowsill, where other plants might struggle in the heat, and many provide a stunning display when they flower. A cactus only needs repotting when it outgrows its current container and, even then, only needs to move up one pot size.
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Missouri Botanical Garden
St. Louis, Missouri, USA
Gardens of the Generalife, Alhambra
Granada, Spain
Dubai Miracle Garden
Dubai, United Arab Emirates
Kenrokuen Garden
Kanazawa, Ishikawa, Japan
Lalbagh Botanical Garden
Bangalore, India
Royal Botanic Gardens, Kew
Richmond, United Kingdom