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Learn about the various types of perennial wildflowers and how to successfully grow them with this gardening guide. Flowers Perennials Plants Wildflowers. Photo By: DK - Simple Steps to Success: Lawns and Groundcover Â© 2012 Dorling Kindersley Limited. Photo By: DK - Simple Steps to Success: Lawns and Groundcover Â© 2012 Dorling Kindersley Limited.
The Plants. Many of the gardenâs most colorful flowers are annuals that explode with color on fast-growing plants. Marigolds (Tagetes erecta), zinnias (Zinnia spp.) and China asters (Callistephus chinensis) all grow from USDA zone 2 to zone 11, but only for one season.nother perennial, tulip (Tulipa spp.), hardy from USDA zone 3 to 8, must be grown as an annual in higher zones because winters do not provide sufficient chilling to produce flowers.