If planted in the ground is
purslane a perennial?

Purslane is perennial in zones 10 and 11. University of Memphis Director of Landscape Joellen Dimond explains if you live in a more northern zone they are an annual and will need to be replanted each spring.
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Related Videos:
Annuals and Perennials for the Garden
Hardiness

Related Resources:
Purslane
Common Purslane