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Flowers/Perennials
ACANTHUS species Bear’s Breeches Zones variable å-kan’thus Perennial Challenging Acanthaceae; native to Southern Europe. Germination: Sow seeds in their permanent location if possible; Acanthus resents transplanting. Sow indoors...
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Flowers/Perennials
ACHILLEA species Milfoil, Yarrow Zones 3-10 å-kil’le-å Perennial Easy Asteraceae; native to Europe and Asia. Germination: The fine seed requires light to germinate, so leave it uncovered. Sow outdoors anytime in spring or summer, up...
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Flowers/Perennials
AGASTACHE cana Giant Hyssop Zones 5-10 åg-å-stak’-e ka’na Perennial Easy Lamiaceae; native to New Mexico and West Texas. Germination: Sow indoors, covering the seeds with 4 times their thickness in soil and maintaining a...
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Flowers/Perennials
ALCEA rosa (Althea rosea) Hollyhock Zones 3-9 al-se’å ros’å Biennial, Perennial Easy Malvaceae; native to China. Germination: Sow perennial varieties outdoors anytime in spring or summer, up to 2 months before first fall frost....
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Flowers/Perennials
ALCHEMILLA mollis Lady’s Mantle Zones 4-9 al-kem-ill‘å mol’is Perennial Moderate Rosaceae; native to Europe and Asia. Germination: For best results, sow indoors, leaving seed uncovered and maintaining 65-68° F during...
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Flowers/Perennials
ALLIUM species Flowering Onion Zones in text below al’le-um species Perennial Easy Lilaceae; native to Asia and Europe. Germination: Allium species have erratic germination, but the rate is improved by pre-chilling the seed in a...
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Flowers/Perennials
ALSTROEMERIA aurea (aurantiaca) hybrids Peruvian Lily Zones 6 to 10 al-stre-mer’e-å Perennial Challenging Alstromeriaceae; native to South America. Germination: Sow outdoors in early spring while the soil is cool. Or sow...
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Flowers/Perennials
ALYSSUM montanum Basket of Gold Zones 5-8 å-liss’um mön’ta-num Perennial Brassicaceae; native to the Mediterranean. Germination: Sow outdoors in early spring, leaving seed uncovered, or Sow indoors, leaving seeds uncovered and...
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Flowers/Perennials
ANGELICA species Angelica Variable an-jel’e-kå Perennial Challenging Carrot family (Apiaceae); native to Eastern Europe and North America. Germination: Sow outdoors in late fall for spring germination, or sow indoors after...
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Flowers/Perennials
AQUILEGIA species Columbine Zones 4 to 8 ak-wi-le'ji-å Perennial Easy Ranunculaceae, native to the northern hemisphere. Germination: Sow seeds indoors at a temperature of 68-70° and with no cover as light aids in germination. Expect...
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"Digging up a mature clump of perennials, separating it into segments with new stems and roots and discarding the old core is an effective way to keep plants vigorous, free-flowering and disease-free," Adrian Higgins, The Washington Post Garden Book |
















