The American Gardener
(The American Horticultural Society)
I increasingly value plants that self-sow to fill empty spaces in the garden. They make unexpected color combinations, provide seeds for wildlife and increase genetic diversity. My reliable favorites germinate year after year without becoming pests, and are easy to pull out where I don’t want them. Great gardeners and ecological landscapers share tips on good plants for naturalizing and tips for encouraging them to germinate.