Southwest Virginia falls into USDA Plant Hardiness Zones 6a and 6b , where many repeated and annual flowers can thrive in full sun . After heave , apply 2 to 3 inches of mulch , like pine bark , to hold in wet and help to blockade weed growth . Full sun plants will require tearing every seven to 10 day if there is no rain and can do good from an all - intention plant fertilizer .
Yarrow
Yarrow ( Achillea millefolium ) can strive up to 3 feet marvellous and produces ashen , red or yellow blossom from spring into autumn . Yarrow is drought - tolerant , adding to its note value as a sun - loving perennial . The leaf of Achillea millefolium is fern - like and emits a fragrance when crushed . Propagate by root ball part about every five years or from seed .
Pinks
Pinks ( Dianthus plumarius ) , also acknowledge as dianthus , are a shaggy-haired , evergreen perennial reaching 12 to 18 inches tall . From late spring to mid - summertime , pinks grow fragrant blossom that may be purple , rose , white or bicolor . Deadheading can extend bloom metre . In optimal wet and sun conditions , the deadheaded pink may bloom again into early fall . flora near a sidewalk or introduction to relish the fragrance .
Candytuft
Candytuft ( Iberis umbellata ) , which grows to about 12 inches marvelous , can be used for a border . This shaggy perennial produces pink , white or light imperial flowers in the leaping that may last into summer . Candytuft is a good companion flora for tulips or snapdragons . Cut back the top foliage after blooming to keep candytuft from getting leggy .
Snapdragon
Snapdragon ( Antirrhinum majus ) is annual prime suitable for full sun . Snapdragon blossom from spring into crepuscle and grows from 6 to 36 inches tall , depend on the mixture . Bloom people of color may be white , pinkish , red , icteric , lavender or orange . Cut the spent blooming to advance a rush of new blooms .
Zinnia
Zinnia ( Zinnia spp . ) is an yearly flower that can grow 1 to 3 substructure tall . Pinch back the stems when the industrial plant is about 6 inches tall to encourage ramify for a fuller plant life . The long - staunch flower of zinnia are desirable for cuttings and may be white , yellow , reddened , pinkish , orange or bicolor . The plant blossom summertime into declination .
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