1. HEDYCHIUM coccineum - Ginger Lily

 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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2. HELENIUM species - Sneezeweed

 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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3. HELIANTHUS maximilianii - Prairie Sunflower

 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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4. HELIANTHUS species - Sunflower

 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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5. HELICHRYSUM bracteatum - Strawflower

 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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6. HELICHRYSUM petiolare var. minus - Licorice Plant

 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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7. HELIOPSIS helianthoides - Sunflower Heliopsis

 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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8. HELIOTROPIUM arborescens - Heliotrope

 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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9. HELLEBORUS niger - Christmas Rose

 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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10. HEMEROCALLIS hybrids - Daylily

 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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