Everything you need to know to grow a beautiful flower garden with the Seed Library. Uvularia grandiflora Perennial Planting: After cold stratification, directly sow outdoors after the last spring frost. Harvest Days: 1 - 2 years Light: Partial shade Spacing: 12” - 18” Height: 12” Depth: Barely cover Water: 1” - 1 ½” per week Germination: Varies Notes: Can be sown directly outdoors in the late fall before the first frost. Attracts pollinators. Requires cold stratification. Store seeds in a sealed plastic bag with damp soil in the refrigerator for 60 - 90 days. Then sow them outdoors by lightly pressing the seeds into the soil surface. Rudbeckia hirta Perennial Planting: Sow directly outdoors after the last spring frost. Harvest Days: 70 Light: Sun Spacing: 12” - 18” Height: 30” Depth: barely cover Water: 1” per week Germination: 12 - 20 days Notes: Long blooming and easy to grow. *Toxic: please use caution when handling* Gaillardia aristata Perennial Planting: Sow directly outdoors after the last spring frost. Harvest Days: 84 - 91 Light: Sun Spacing: 18” Height: 18” - 36” Depth: ¼” Water: 1” per week Germination: 14 - 35 days Notes: Deer and rabbit resistant. Wash hands after handling. Favorable to container growing. For earliest blooms, start indoors 6 - 8 weeks before the last spring frost. *Toxic: use caution when handling* Linum perenne var. lewisii Perennial Planting: Sow directly outdoors after the last spring frost. Harvest Days: 2 years Light: Sun Spacing: 12” Height: 18” - 24” Depth: ¼” Water: 1” per week Germination: 6 - 12 days Notes: Favorable to container growing. Wash hands after handling. *Toxic: use caution when handling* Perennial & Annual Planting: Sow directly outdoors after the last spring frost, mix seeds with sand and rake the seeds into the soil and tamp down lightly. Harvest Days: Varies Light: Sun Spacing: broadcast sowing Height: 10” - 48” Depth: barely cover Water: 1” per week Germination: 10 - 28 days Notes: Attracts pollinators. Variety of annuals and perennials creates a meadow effect; wash hands after handling seeds. *Toxic: use caution when handling* Eschscholzia californica Annual Planting: Sow directly outdoors 2 - 4 weeks before the last spring frost. Harvest Days: 50 - 60 Light: Sun Spacing: 6” - 8” Height: 12” - 18” Depth: Surface sow Water: 1” per week Germination: 7 - 14 days Notes: Favorable to container growing. Deer resistant. Requires cold treatment, so sow seeds as soon as the soil can be worked. *Toxic: use caution when handling* Anemone canadensis Perennial Planting: After cold stratification, directly sow outdoors after the last spring frost. Harvest Days: 1 - 2 years Light: Sun, partial shade Spacing: 6” - 12” Height: 12” Depth: Barely cover Water: 1” per week Germination: Varies Notes: Deer and rabbit resistant. Wash hands after handling. Can be sown directly outdoors in the late fall before the first frost. Requires double stratification. Store seeds in a sealed plastic bag with damp soil in the refrigerator for 6 - 8 weeks, then remove them and keep at room temperature for 6 - 8 weeks. Finally, refrigerate seeds for another 6 - 8 weeks. Add more water to the bag if soil has dried out during this time. Then sow them outdoors by lightly pressing the seeds into the soil surface. Salvia Sclarea Annual Planting: Sow directly outdoors after the last spring frost. Harvest Days: 75 - 85 Light: Sun Spacing: 18” Height: 28” Depth: Surface sow Water: 1” per week Germination: 10 - 21 days Notes: For earliest blooms, start indoors 10 weeks before the last spring frost. Deer and rabbit resistant. Attracts pollinators. *Toxic: use caution when handling* Aquilegia canadensis Perennial Planting: After cold stratification, directly sow outdoors after the last spring frost. Harvest Days: 1 year Light: Sun, partial shade Spacing: 10” - 17” Height: 2’ Depth: Surface sow Water: 1” per week Germination: 21 days Notes: Deer and rabbit resistant. Attracts pollinators. Wash hands after handling. Can be sown directly outdoors in the late fall before the first frost. Requires cold stratification. Store seeds in a sealed plastic bag with damp soil in the refrigerator for 30 - 60 days. Then sow them outdoors by lightly pressing the seeds into the soil surface. For earliest blooms, start indoors 6 - 8 weeks before the last spring frost. Tagetes Annual Planting: Sow directly outdoors after the last spring frost. Harvest Days: 80 Light: Sun Spacing: 15” - 18” Height: 24” Depth: ¼” - ½” Water: 1 ½” per week. Germination: 5 - 7 days. Notes: For earliest blooms, start indoors 6 - 8 weeks before the last spring frost. Great companion or sacrificial plant. Large blooms all summer. Nemophila Maculata Annual Planting: Sow directly outdoors after the last spring frost. Harvest Days: 42 - 60 Light: Sun, partial shade Spacing: 6” - 12” Height: 12” Depth: ⅛” Water: 1” per week Germination: 7 - 20 days Notes: For earliest blooms, start indoors 6 - 8 weeks before the last spring frost. Deer resistant. Drought tolerant. Gentianopsis crinita Biennial Planting: After cold stratification, directly sow outdoors after the last spring frost. Harvest Days: 2 years Light: Sun Spacing: 8” - 24” Height: 12” Depth: Surface sow Water: 2” per week Germination: 60 - 90 days Notes: Do not allow soil to dry out. Can be sown directly outdoors in the late fall before the first frost or requires cold stratification. Store seeds in a sealed plastic bag with damp soil in the refrigerator for 60 - 90 days. Then sow them outdoors by lightly pressing the seeds into the soil surface. Gomphrena globosa Annual Planting: Sow directly outdoors after the last spring frost. Harvest Days: 2 years Light: Sun Spacing: 6” Height: 6” Depth: Surface sow Water: 1” per week Germination: 14 - 28 days Notes: Favorable to container growing. For earliest blooms, start indoors 6 - 8 weeks before the last spring frost. Alcea Rosea Biennial Planting: Sow directly outdoors after the last spring frost. Harvest Days: 90 Light: Sun Spacing: 18” Height: 5’ - 6’ Depth: ¼” Water: 1” per week. Germination: 15 - 25 days Notes: Massive, showy flowers. Requires support. Impatiens Balsamina Annual Planting: Start indoors 8 - 12 weeks before the last spring frost. Harvest Days: 115 Light: Sun, partial shade Spacing: 8” - 12” Height: 12” Depth: Surface sow Water: 1” per week Germination: 14 - 21 days Notes: Favorable to container growing. Attracts pollinators. Start seeds in small tray cells with sterilized soil mix. Fill the cells with soil mix, then water with warm water before sowing seeds. Once the soil has cooled, sow seeds onto the surface of the soil and compress, but don’t cover. Keep under a heat lamp or in direct sunlight. Water from the bottom during germination. Once outdoor soil temperatures are consistently about 55°F and the threat of frost has passed, then transplant outdoors. Eutrochium maculatum Perennial Planting: After cold stratification, directly sow outdoors after the last spring frost. Harvest Days: 1 - 2 years Light: Sun, partial shade Spacing: 3’ - 4’ Height: 5’ Depth: Surface sow Water: 1” per week Germination: 2 - 4 weeks Notes: Deer resistant. Attracts pollinators. Benefits from support. Can be sown directly outdoors in the late fall before the first frost or requires cold stratification. Store seeds in a sealed plastic bag with damp soil in the refrigerator for 30 - 60 days. Then sow them outdoors by lightly pressing the seeds into the soil surface. For earliest blooms, start indoors 8 - 10 weeks before the last spring frost. Tropaeolum majus Annual Planting: Sow directly outdoors 1 - 2 weeks after the last spring frost. Harvest Days: 55 - 65 Light: Sun, partial shade Spacing: 8” - 12” Height: 5’ - 10’ Depth: ½” - 1” Water: 1” per week Germination: 7 - 14 days Notes: Favorable to container growing. Edible flowers. Benefits from support. Deer and rabbit resistant. Thrives in poor soil; good choice for hanging baskets. For earliest blooms, start indoors 4 - 6 weeks before the last spring frost. Lavandula angustifolia Perennial Planting: Sow directly outdoors after the last spring frost. Harvest Days: 90 - 120 Light: Sun Spacing: 18” Height: 18” - 36” Depth: ¼” Water: ½” per week Germination: 14 - 60 days Notes: Favorable to container growing. For earliest blooms, start indoors 10 - 12 weeks before the last spring frost. Zinnia elegans Annual Planting: Sow directly outdoors after the last spring frost. Harvest Days: 65 Light: Sun Spacing: 4” - 6” Height: 12” -18” Depth: ¼” Water: 1” per week Germination: 7 - 10 days Notes: Deer resistant. For earliest blooms, start indoors 4 - 6 weeks before the last spring frost. *Toxic: use caution when handling* Lupinus polyphyllus Perennial Planting: Sow directly outdoors 4 - 6 weeks before the last spring frost. Harvest Days: 1 year Light: Sun, partial shade Spacing: 18” - 24” Height: 24” - 40” Depth: ¼” Water: 1” per week Germination: 10 - 28 days Notes: Attracts pollinators. Wash hands after handling; keep out of reach of pets. Soak seeds for 24 hrs before planting. Tithonia rotundifolia Annual Planting: Sow directly outdoors after the last spring frost. Harvest Days: 85 - 90 Light: Sun Spacing: 12” - 24” Height: 60” - 72” Depth: barely cover Water: 1” per week Germination: 7 - 14 days Notes: Attracts pollinators. Requires support. For earliest blooms, start indoors 6 weeks before the last spring frost. *Toxic: use caution when handling* Ipomoea Alba Annual Planting: Start indoors 4 - 6 weeks before the last spring frost. Harvest Days: 84 Light: Sun Spacing: 8” - 10” Height: 6’ Depth: ½” Water: 1” per week Germination: 8 - 10 days. Notes: Requires support. Leaves and flowers are poisonous if ingested. Wash hands after handling. Seeds germinate best when scratched with sandpaper or are lightly nicked with nail clippers, then soaked in water for 24 hours prior to planting. Blooms will not appear until days begin to shorten. *Toxic: use caution when handling* Portulaca grandiflora Annual Planting: Sow directly outdoors after the last spring frost. Harvest Days: 84 - 91 Light: Sun Spacing: 12” Height: 3” - 9” Depth: barely cover Water: 1” per week Germination: 10 - 14 days Notes: Deer resistant. Favorable to container growing. For earliest blooms, start indoors 6 - 8 weeks before the last spring frost. Allium cernuum Perennial Planting: After cold stratification, directly sow outdoors after the last spring frost. Harvest Days: 3 years Light: Sun, partial shade Spacing: 4” - 8” Height: 18” Depth: barley cover Water: 1” per week Germination: 30 - 60 days Notes: Deer resistant. Attracts pollinators. Can be sown outdoors in the late fall before the first frost or requires cold stratification. Store seeds in a sealed plastic bag with damp soil in the refrigerator for 60 days. Then sow them outdoors by lightly pressing the seeds into the soil surface. For earliest blooms, start indoors 6 - 8 weeks before the last spring frost. Salpiglossis Sinuata Annual Planting: Sow directly outdoors after the last spring frost. Harvest Days: 100 - 120 Light: Sun, partial shade Spacing: 9” - 12” Height: 36” Depth: ¼” Water: 1” per week Germination: 7 - 21 days Notes: For earliest blooms, start indoors 6 weeks before the last spring frost. Deer resistant. Attracts pollinators. Favorable to container growing. These seeds need darkness to germinate, so make sure to cover the seeds until sprouts begin. *Toxic: use caution when handling* Corydalis sempervirens Annual Planting: After cold stratification, directly sow outdoors after the last spring frost. Light: Sun, partial shade Spacing: 18” - 24” Height: 3’ Depth: Surface sow Water: 1” per week Germination: Varies Notes: Deer and rabbit resistant. Wash hands after handling. Can be sown outdoors in the late fall before the first frost or requires cold stratification. Store seeds in a sealed plastic bag with damp soil in the refrigerator for 30 - 60 days. Then sow them outdoors by lightly pressing the seeds into the soil surface. Xeranthemum Annuum Annual Planting: Start indoors 5 - 8 weeks before the last spring frost. Harvest Days: 80 - 90 Light: Sun Spacing: 6” - 12” Height: 18” - 24” Depth: Gently press into soil or barely cover Water: 1” per week Germination: 7 - 14 days Notes: Favorable to container growing. Deer and rabbit resistant. Phacelia tanacetifolia Annual Planting: Sow directly outdoors after the last spring frost. Harvest Days: 45 - 60 Light: Sun Spacing: 2” - 12” Height: 30” - 40” Depth: ¼” Water: 1” per week Germination: 7 - 14 days Notes: Deer resistant. Attracts pollinators. Callistephus Chinensis Annual Planting: Start indoors 6 - 8 weeks before the last spring frost. Harvest Days: 80 Light: Sun Spacing: 12”- 18” Height: 36” Depth: Barely cover Water: 1” per week. Germination: 14 - 21 days. Notes: Loves cool weather; use for late season color. Drymocallis arguta Planting: After cold stratification, directly sow outdoors after the last spring frost. Harvest Days: 2 - 5 years Light: Sun, partial shade Spacing: 12” - 18” Height: 2’ Depth: Surface sow Notes: Deer resistant. Attracts pollinators. Can be sown directly outdoors in the late fall before the first frost or requires cold stratification. Store seeds in a sealed plastic bag with damp soil in the refrigerator for 60 - 120 days. Then sow them outdoors by lightly pressing the seeds into the soil surface. For earliest blooms, start indoors 6 - 8 weeks before the last spring frost. *Toxic: use caution when handling* Tradescantia bracteata Perennial Planting: After cold stratification, directly sow outdoors after the last spring frost. Harvest Days: 6 months Light: Sun Spacing: 6” - 10” Height: 12” Depth: Barely cover Water: 1” per week Germination: 60 - 90 days Notes: Deer resistant. Attracts pollinators. Can be sown directly outdoors in the late fall before the first frost or requires cold stratification. Store seeds in a sealed plastic bag with damp soil in the refrigerator for 30 - 120 days. Then sow them outdoors by lightly pressing the seeds into the soil surface. Passiflora incarnata Perennial Planting: After cold stratification, directly sow outdoors after the last spring frost. Harvest Days: 1 - 2 years Light: Sun, partial shade Spacing: 8” - 12” Height: 20’ Depth: Barely cover Water: 1” per week Germination: 1 - 6 weeks Notes: Attracts pollinators. Deer resistant. Requires support. Can be sown directly outdoors in the late fall before the first frost or requires cold stratification. Store seeds in a sealed plastic bag with damp soil in the refrigerator for 60 - 90 days. After stratification, soak seeds in warm water for 12 - 24 hours. Then sow them outdoors by lightly pressing the seeds into the soil surface. Hibiscus laevis Perennial Planting: After cold stratification, directly sow outdoors after the last spring frost. Harvest Days: 2 - 3 years Light: Sun, partial shade Spacing: 2’ - 3’ Height: 5’ Depth: Surface sow Water: 2” per week Germination: 14 - 30 days Notes: Attracts pollinators. Requires support. Do not allow soil to dry out. Can be sown directly outdoors in the late fall before the first frost or requires cold stratification. Store seeds in a sealed plastic bag with damp soil in the refrigerator for 60 - 90 days. Then sow them outdoors by lightly pressing the seeds into the soil surface. Ammannia coccinea Annual Planting: After cold stratification, directly sow outdoors after the last spring frost. Harvest Days: Varies Light: Partial shade Spacing: 1’ - 2’ Height: 2’ Depth: Surface sow Water: 2” per week Notes: Attracts pollinators. Do not allow soil to dry out. Can be sown directly outdoors in the late fall before the first frost or requires cold stratification. Store seeds in a sealed plastic bag with damp soil in the refrigerator for 30 - 60 days. Then sow them outdoors by lightly pressing the seeds into the soil surface. For earliest blooms, start indoors 6 - 8 weeks before the last spring frost. Cosmos bipinnatus Annual Planting: Sow directly outdoors 1 - 2 weeks after the last spring frost. Harvest Days: 75 - 90 Light: Sun Spacing: 12” Height: 36” - 48” Depth: ¼”, barely cover Water: 1” per week Germination: 7 - 14 days Notes: Favorable to container growing. Requires support. For earliest blooms, start indoors 4 - 6 weeks before the last spring frost. Cosmos bipinnatus Annual Planting: Sow directly outdoors after the last spring frost Harvest Days: 85 Light: Sun Spacing: 12” - 18” Height: 36”- 48” Depth: Barely cover. Water: 1” per week Germination: 5 - 10 days. Notes: Requires support. For earliest blooms, start indoors 4 - 6 weeks before the last spring frost. Heat and drought tolerant. Oenothera speciosa Perennial Planting: Sow directly outdoors after the last spring frost. Harvest Days: 91 - 98 Light: Sun Spacing: 12” - 18” Height: 12” - 24” Depth: Lightly press 2 - 3 seeds in soil without covering Water: ½” per week Germination: 10 - 30 days Notes: Favorable to container growing. For earliest blooms, start indoors 6 - 8 weeks before the last spring frost. Antirrhinum majus Annual Planting: Start indoors 8 - 10 weeks before the last spring frost. Harvest Days: 115 - 121 Light: Sun, partial shade Spacing: 8” - 12” Height: 30” - 36” Depth: Barely cover Water: 1” per week Germination: 8 - 14 days Notes: Favorable to container growing. Blooms in cool temperatures. *Toxic: use caution when handling* Asclepias viridis Perennial Planting: After cold stratification, directly sow outdoors after the last spring frost. Harvest Days: 2 years Light: Sun, partial shade Spacing: 2’ - 3’ Height: 12” Depth: Barely cover Water: 1” per week Germination: 10 - 15 days Notes: Deer resistant. Attracts pollinators. Can be sown outdoors in the late fall before the first frost or requires cold stratification. Store seeds in a sealed plastic bag with damp soil in the refrigerator for 30 - 60 days. Then sow them outdoors by lightly pressing the seeds into the soil surface. For earliest blooms, start indoors 8 - 10 weeks before the last spring frost. *Toxic: use caution when handling* Lupinus perennis subsp. perennis Perennial Planting: After cold stratification, directly sow outdoors after the last spring frost. Harvest Days: 1 - 2 years Light: Sun, partial shade Spacing: 10” - 18” Height: 2’ Depth: Barely cover Water: 1” per week Germination: 14 - 28 days Notes: Wash hands after handling. Deer and rabbit resistant. Attracts pollinators. Can be sown directly outdoors in the late fall before the first frost or requires cold stratification. Before stratifying, the seed’s hard coating must be nicked using sandpaper or a nail file. Once nicked, place seeds in a damp paper towel, sealed in a plastic bag and stored in the refrigerator for 10 days. Then sow them outdoors by lightly pressing the seeds into the soil surface. Helianthus Annuus Annual Planting: Sow directly outdoors after the last spring frost. Harvest Days: 50 - 55 Light: Sun Spacing: 4” - 6” Height: 60” - 72” Depth: ½” Water: 1” per week Germination: 7 - 14 days Notes: Requires support. For earliest blooms, start indoors 2 - 3 weeks before the last spring frost. Bidens aristosa Annual Planting: After cold stratification, directly sow outdoors after the last spring frost. Harvest Days: 60 Light: Sun, partial shade Spacing: 1’ - 3’ Height: 4’ Depth: Surface sow Water: 2” per week Germination: 60 days Notes: Deer resistant. Attracts pollinators. Do not allow soil to dry out. Can be sown directly outdoors in the late fall before the first frost or requires cold stratification. Store seeds in a sealed plastic bag with damp soil in the refrigerator for 60 - 90 days. Then sow them outdoors by lightly pressing the seeds into the soil surface. *Toxic: use caution when handling* Lathyrus odoratus Annual Planting: Sow directly outdoors after the last spring frost. Harvest Days: 90 - 100 Light: Sun Spacing: 12” Height: 5’ - 6’ Depth: 1” Water: 1” per week Germination: 10 - 12 days Notes: Requires support. Favorable to container growing. Helianthus annuus Annual Planting: Sow directly outdoors after the last spring frost. Harvest Days: 50 - 65 Light: Sun, partial shade Spacing: 8” - 12” Height: 24” - 36” Depth: ½” Water: 1” per week Germination: 7 - 14 days Notes: Favorable to container growing. Thunbergia alata Annual Planting: Sow directly outdoors after the last spring frost. Harvest Days: 56 - 63 Light: Sun, partial shade Spacing: 8” - 12” Height: 1’ - 8’ Depth: ¼” Water: 1” per week Germination: 10 - 21 days Notes: Requires support. Favorable to container growing. For earliest blooms, start indoors 6 - 8 weeks before the last spring frost. Tropaeolum Majus Annual Planting: Sow directly outdoors 1 - 2 weeks after the last spring frost. Harvest Days: 55 - 65 Light: Sun, partial shade Spacing: 6” - 8” Height: 5’ - 10’ Depth: ½” - 1” Water: 1” per week. Germination: 7 - 14 days. Notes: Favorable to container growing. Edible flowers. Benefits from support. Deer and rabbit resistant. Thrives in poor soil; good choice for hanging baskets. For earliest blooms, start indoors 4 - 6 weeks before the last spring frost. Helianthus annuus Annual Planting: Sow directly outdoors after the last spring frost. Harvest Days: 70 - 110 Light: Sun Spacing: 18” Height: 4’ - 6’ Depth: ½” Water: 1” per week Germination: 10 - 14 days Notes: Requires support. For earliest blooms, start indoors 3 - 6 weeks before the last spring frost. Viola tricolor Perennial Planting: Start indoors 6 - 8 weeks before the last spring frost. Harvest Days: 65 - 80 Light: Sun, partial shade Spacing: 8” Height: 7” - 10” Depth: Barely cover Water: 1” per week Germination: 7 - 10 days Notes: Allow soil to dry out in between waterings. Favorable to container growing. Camassia scilloides Perennial Planting: After cold stratification, directly sow outdoors after the last spring frost. Harvest Days: 3 - 5 years Light: Sun, partial shade Spacing: 8” - 12” Height: 2’ Depth: Barely cover Water: 1” per week Germination: 3 - 4 years Notes: Attracts pollinators. Deer and rabbit resistant. Can be sown directly outdoors in the late fall before the first frost or requires cold stratification. Store seeds in a sealed plastic bag with damp soil in the refrigerator for 60 - 90 days. Then sow them outdoors by lightly pressing the seeds into the soil surface.Bellwort
Black Eyed Susan
Blanket Flower*
Blue Flax*
Butterfly Hummingbird Mix*
California Poppy*
Canada Anemone*
Clary Sage
Columbine*
Cracker Jack Marigolds
Fivespot
Fringed Gentian
Gomphrena
Hollyhocks
Impatiens
Joe Pye Weed
Kaleidoscope Nasturtium
Lavender
Lilliput Zinnia
Lupine *
Mexican Sunflower
Moonflower
Moss Roses*
Nodding Onion
Painted Tongue
Pale Corydalis*
Paper Flower
Phacelia
Powder Puff Aster
Prairie Cinquefoil
Perennial Prairie Spiderwort*
Purple Passion Flower
Rose Mallow
Scarlet Toothcup
Sea Shell Cosmos
Sensation Cosmos
Showy Evening Primrose
Snapdragon
Spider Milkweed*
Sundial Lupine*
Sunfill Sunflower
Swamp Marigold
Sweet Pea*
Teddy Bear Sunflower
Thunbergia
Trailing Nasturtiums
Velvet Queen Sunflower
Viola
Wild Hyacinth