Breck's Bulb and Perennial Planting Guide
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Metric conversion 1"=2.5cm, 1 foot=30cm
| Flowering Time | Planting Depth | Spacing | Flowering Height | Suitable for naturalizing | Comments |
|---|---|---|---|---|---|
| VERY EARLY SPRING | |||||
| Miniature Iris | 3-4" | 3-4" | 5" | Y | Good for borders |
| Snow Crocus | 3" | 2-3" | 3-5" | Y | Multiplies annually |
| Snowdrops | 3" | 2-3" | 4-6" | Y | Long-lasting |
| Snow Glories | 3" | in groups" | 4-7" | Y | Long-lasting |
| Stardrift | 3" | 2-3" | 4-5" | Y | Long-lasting |
| Winter Aconite | 3" | 2-3" | 3-4" | Y | Ground Cover |
| Miniature Daffodil | 3" | 3-6" | 6-8" | Y | Ground Cover |
| EARLY SPRING | |||||
| Emperor Tulips | 6" | 3-6" | 14-16" | N | Cut flowers |
| Giant Crocus | 3" | 3-4" | 4-5" | Y | Borders |
| Hyacinths | 6" | 4-6" | 8-10" | N | Fragrant |
| Jumbo Crocus | 3" | 3-4" | 4-5" | Y | Borders |
| Peacock Tulip Mix | 6" | 3-6" | 8" | N | Rock gardens |
| Kaufmanniana Tulips | 6" | 3-6" | 5-15" | N | Borders |
| Star of Holland | 3" | 2-3" | 6" | Y | Long-lasting |
| Trumpet Daffodils | 6" | 4-6" | 16-20" | Y | Cut flowers |
| Grecian Windflowers | 3" | in groups | 3-4" | Y | Ground cover |
| MID-SPRING | |||||
| Crown Imperials | 8" | 8-12" | 34-36" | N | Prevents rodents |
| Double Early Tulips | 6" | 3-6" | 8" | N | Borders |
| Dwarf Fritillaria | 3" | 2-3" | 12-14" | Y | Multiplies annually |
| Fritillaria Persica | 8" | 4-8" | 3-4" | N | Borders |
| Grape Hyacinths | 3" | 2-3" | 6-8" | Y | Ground Cover |
| Multi-Floral Tulips | 6" | 3-6" | 6-24" | N | Long-lasting |
| Perennial Tulips | 6-9" | 3-6" | 16-26" | Y | Borders |
| Single Early Tulips | 6" | 3-6" | 16-18" | N | Cut flowers |
| Spring Star Flower | 3" | 2-3" | 4-5" | Y | Multiplies annually |
| Trout Lily | 4" | 3-4" | 8-12" | Y | Borders |
| Summer Snowflake | 4" | 8-14" | 8-14" | Y | Long-lasting |
| Darwinhybrid Tulips | 6" | 3-6" | 22-26" | N | Cut flowers |
| Triumph Tulips | 6" | 3-6" | 14-22" | N | Cut flowers |
| Daffodils | 6" | 4-6" | 6-18" | Y | Cut flowers |
| LATE SPRING | |||||
| Dracunculus vulgaris | 5-6" | 10-12" | 14-20" | Y | Long-lasting |
| English Bluebells | 4" | 3-4" | 10-14" | Y | Ground cover |
| Double Late Tulips | 6" | 3-6" | 16-22" | N | Cut flowers |
| Fringed Tulips | 6" | 3-6" | 14-20" | N | Border |
| Lily-Flowering Tulips | 6" | 3-6" | 20-26" | N | Cut flowers |
| Parrot Tulips | 6" | 3-6" | 20-28" | N | Bouquets |
| Peony-Flowering Tulips | 6" | 3-6" | 18-22" | N | Bouquets |
| Rembrandt Tulips | 6" | 3-6" | 16-26" | N | Bouquets |
| Wood Hyacinths | 4" | 3-4" | 8" | Y | Ground cover |
| Viridiflora Tulips | 6" | 3-6" | 12-26" | N | Cut flowers |
| Tassel Hyacinths | 4" | 2-3" | 8-10" | Y | Long-lasting |
| LATE SPRING - EARLY SUMMER | |||||
| Giant Allium | 6" | 4-12" | 24-60" | Y | Dried arrangements |
| Alliums | 3" | 2-4" | 12-24" | Y | Dried arrangements |
| Calochortus | 2-4" | 3-4" | 6-24" | N | Resemble tulips |
| Camassia | 3-4" | 6" | 15-36" | Y | Ground cover in shade |
| Firecracker Flower | 3-4" | 6" | 24-30" | N | |
| Hardy Glads | 6" | 3-4" | 20-24" | N | Blooms in early summer |
| Bearded Iris | 2-4" | 12-18" | 28-40" | N | Blooms late spring early summer |
| Dwarf Iris | 2-4" | 6-12" | 10-15" | N | Blooms in spring |
| Reblooming Iris | 2-4" | 12-24" | 28-40" | N | Blooms mid-spring/early summer and again in midsummer/early fall |
| Arum Italicum | 5-6" | 4-6" | 10-50" | Y | Good in shade |
| Mountain Bells | 3" | 2-3" | 10-14" | Y | Borders |
| Mountain Lilies | 3" | 2-3" | 12-15" | Y | Cut flowers |
| Pink Buttercups | 2" | 3-4" | 3" | Y | Long blooming season |
| Poppy Anemones | 2-3" | 2-4" | 10-14" | N | Not winter hardy; plant in spring |
| Double Anemones | 2-3" | 2-4" | 10-12" | N | |
| Tritilea | 2-3" | 2-4" | 24" | Y | |
| Tall Dutch Iris | 4" | 3-4" | 20-24" | Y | Cut flowers |
| Cyclamen | 2" | 6" | 4-6" | Y | Good in shade |
| Asiatic Lilies | 5-6" | 9-12" | 36" | Y | Fragrant; cut flowers |
| Tiger Lilies | 6" | 9-12" | 30-48" | Y | Cut flowers |
| Madonna Lily | 5-6" | 9-12" | 36-48" | Y | Fragrant; cut flowers |
| Species Lilies | 6" | 4-9" | 24-48" | N | Fragrant; cut flowers |
| EARLY SUMMER | |||||
| Astilbe | 1-2" | 2" | 24" | N | Cut flowers and everlasting arrangements |
| Peony | 1-2" | 3' | 27-48" | N | Planting depth refers to maximum distance eyes on tubers should be placed below the surface |
| Oriental Lilies | 5-6" | 6-9" | 24-36" | N | Fragrant; cut flowers |
| MID - LATE SUMMER | |||||
| Begonias | 1-2" | * | 6-14" | N | 10-12" apart in garden; 4-6" in containers |
| Calla | 3" | 12-15" | 18-24" | N | Keep moist in summer. Good for pots too. Lift before frost. |
| Crocosmia | 5" | 4-6" | 2-3' | N | Fall-lifting is only necessary in northern climates. |
| DAHLIAS | |||||
| Dinnerplate | 2" | 2-3" | 3-4" | M | Provide moisture and lots of sun. Your dahlias will reward you with lots of blooms. Lift before frost. |
| Dwarf | 2" | 12-18" | 12" | " | same as above |
| Mixed | 2" | 24-36" | 3-5' | N | same as above |
| Pompon | 2" | 12-18" | 3-4' | N | same as above |
| Windowbox | 2" | 12-18" | 12" | same as above | |
| Daylilies | 2-3" | 15-24" | 18-36" | Y | Enjoy a steady succession of bell-shaped blooms all summer. |
| GLADIOLUS | |||||
| Hardy (Nanus) | 6" | 4-6" | 3-5' | N | Plant at one-to-two wk intervals. Begin after last frost and continue until about two mos. before first fall frost. |
| Orchidola | 6" | 4-6" | 20-24" | N | same as above |
| Dwarf | 6" | 4-6" | 18-24" | N | same as above |
| Hardy Cyclamen | 4" | 12" | 4-6" | Y | Bloom in late summer |
| Lilies | 6-9" | 6-9" | 1 1/2 - 4' | Y | Fragrant, cut flower |
| PHLOX | |||||
| Tall Hybrid | 1" | 18-24" | 2-3" | N | Great as a backdrop to lower growing plants. |
| Creeping | 1" | 8-12" | 3-6" | N | Hardy ground cover. Mass of blooms in late spring. |
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