Flowering shrubs. Forsythia Forsythia spp. and hybrids Once shade-tolerant forsythia's finished flowering, its pest-free foliage will look good all summer long — some varieties even turn purple in fall. Blooms: Yellow or white flowers in early spring. Light: Full sun to part shade. Size: 1 to 10 ft. tall, 2 to 12 ft. wide. Cold-hardy USDA zones 4 to 9. Heat-tolerant AHS zones 9 to 1
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