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Seed Encyclopedia
| Flowers (7/339) Annuals, Pot Plants, Perennials, Bedding Plants, Biennials, House Plants, Vines & Climbers |
Edibles (5/96) Vegetables, Perennial Herbs, Fruit, Annual Herbs, Biennial Herbs |
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Flowers/Pot Plants
HEDYCHIUM coccineum Ginger Lily Zone 10 He-dik’-e-um kok-sin’-e-um Pot Plant Zingiberaceae; native to India. Germination: Sow seeds indoors at any season, maintaining a temperature within the medium of 70-75° during germination,...
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Flowers/Perennials
HELENIUM species Sneezeweed Zone 3 to 7 he-le’ne-um Perennial Easy Asteraceae, native to North America. Germination: Best sown indoors at alternating temperatures of 68 and 82°. Sow 8-10 weeks before planting out and with no cover as...
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Flowers/Perennials
HELIANTHUS maximilianii Prairie Sunflower Zones 4 to 10 he-le-an’thus mak-si-mil-i-an’e-i Perennial Easy Asteraceae, native to midwestern America. Germination: Sow indoors at 55-72° (will germinate over a wide temperature range) at...
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Flowers/Annuals
HELIANTHUS species Sunflower he-le-an’thus Annual Easy Asteraceae, native to North America. Germination: Can be sown indoors at 68-86° (will germinate over a wide temperature range). Sow 2-3 weeks before planting out. Sow at a depth...
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Flowers/Annuals
HELICHRYSUM bracteatum Strawflower hel-i-kris’sum brak-te-a’tum Annual Easy Asteraceae, native to Australia. Germination: Best sown indoors 4-6 weeks before planting out. Sow at 60-70° with no cover as light aids in germination....
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Flowers/Annuals
HELICHRYSUM petiolare var. minus Licorice Plant hel-i-kris’um pet-e-o-lå’re mi’nus Annual* Easy Asteraceae, native to South Africa. Germination: Best sown indoors in spring at 68-70° with no cover as light aids in germination....
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Flowers/Perennials
HELIOPSIS helianthoides Sunflower Heliopsis Zone 4 to 9 he-le-op’sis he-le-an-thoy’dez Perennial Easy Asteraceae, native to North America. Germination: Sow seeds indoors 6-8 weeks before planting out. Sow at 68-70° and at a depth of...
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Flowers/Annuals
HELIOTROPIUM arborescens Heliotrope he-le-o-tro’-pe-um ar-bor-es’ens Annual* Moderate Boraginaceae, native to Peru. Germination: Sow seeds indoors at a temperature of 68-70° and with no cover as light aids in germination. Expect...
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Flowers/Perennials
HELLEBORUS niger Christmas Rose Zones 3 to 8 he-leb’ôr-us ni’jer Perennial Difficult Ranunculaceae, native to Europe. Germination: For indoor germination, seeds must undergo cold-moist stratification by placing them in a moistened...
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Flowers/Perennials
HEMEROCALLIS hybrids Daylily Zones 3 to 9 hem-er-o-kal’is Perennial Moderate Liliaceae, native to Europe and Asia. Germination: Best sown indoors at alternating temperatures of 55 and 70° AFTER cold-moist stratification in the...
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Flowers/Annuals
HETEROPAPPUS meyendorfii Blue Chrysanthemum het-er-o-pap’us mi-en-dorf’e-i Annual Easy Asteraceae, native to Europe. Germination: Best sown indoors in late winter at 68°. Sow with no cover as light aids in germination. Expect...
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Flowers/Perennials
HEUCHERA sanguinea Coral Bells Zones 3 to 8 hu’ker-å san-gwin’e-å Perennial Moderate Saxifragaceae; native to New Mexico and Arizona. Germination: Best sown indoors at 53-59° with no cover. Expect germination in 10-15 days. Seeds...
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Flowers/Perennials
HIBISCUS moscheutos Swamp Rose Mallow Zones 5 to 10 hi-bis’kus mos-kew’tos Perennial Easy Malvaceae; native to the eastern United States. Germination: Best sown indoors at 68-72° at a depth of 4 times the diameter of the seeds....
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Flowers/Pot Plants
HIPPEASTRUM hybrids Amaryllis Zone 10 Hip-e-as’-trum Pot Plant Amaryllidaceae; native to Tropical South America. Germination: Sow seeds indoors at any season, maintaining a temperature within the medium of 70-75° during germination,...
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Flowers/Perennials
HOSTA ventricosa Blue Plantain Lily Zones 3 to 9 hos’tå ven-tri-ko’så Perennial Moderate Liliaceae; native to Eastern Asia. Germination: Best sown indoors at 68-70° at a depth of 4 times the diameter of the seeds. Expect...
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Flowers/Annuals
HUMULUS japonicus 'Variegatus' Japanese Hops hu’mu-lus ja-pon’i-cus Annual* Cannabaceae; native to eastern Asia. Germination: Sow outdoors where plants are to grow after all danger of frost is past, or sow seeds indoors,...
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Flowers/Annuals
HUNNEMANNIA fumariifolia Mexican Tulip Poppy hun-a-man’-ne-å fu-mar-i-fo’le-å Annual Papaveraceae; native to Mexico. Germination: Sow outdoors where plants are to grow after all danger of frost is past, or sow seeds indoors 4-6...
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Edibles/Perennial Herbs
HYPERICUM perforatum St. John’s Wort Zones 5 to 8 hi-per’i-cum per-fôr’a-tum Perennial Herb Moderate Hypericaceae; native to Europe and Asia Minor. Germination: Best sown indoors, 10-12 weeks before planting out, at a temperature...
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Flowers/Annuals
HYPOESTES phyllostachya Polka Dot Plant hi-po-es’tez fi-lo-stak’e-å Annual* Easy Acanthaceae; native to South Africa. Germination: Sow indoors at 70-75° in early spring, 8-10 weeks before planting out. For conservatory culture,...
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"Plants vary in their heat stress tolerance, not only from species to species, but also from cultivar to cultivar. In addition, unusual seasons-fewer or more hot days than normal-will invariably affect results in your garden, as will extremely dry or humid conditions," Dr. H. Marc Cathey, with Linda Bellamy, Heat-zone Gardening, How to choose plants that thrive in your region’s warmest weather. |