Dahlia Seeds – Imperialis

Dahlia Imperialis, also known as the “Tree Dahlia,” is a magnificent tall-growing variety admired for its large, elegant blooms and lush green foliage. This impressive plant can reach heights of up to 10 feet, creating a striking presence in any garden or landscape. Blooming in shades of soft lavender-pink, Dahlia Imperialis flowers appear in late fall, adding vibrant color when most other plants have finished blooming. It is a hardy, long-lasting variety ideal for gardeners who appreciate bold, tropical-looking plants with minimal maintenance needs.

Features:

• Produces large, showy blooms in soft lavender-pink shades.

• Can grow up to 8–10 feet tall, giving a tree-like appearance.

• Blooms in late fall when few other plants are flowering.

• Attracts pollinators such as bees and butterflies.

• Easy to grow and low maintenance once established.

• Excellent for borders, backdrops, and ornamental garden displays.

Specifications:

• Scientific Name: Dahlia imperialis

• Common Name (US): Dahlia

• Plant Type: Perennial in warm climates; grown as annual in colder zones

• Bloom Color: Lavender-pink

• Bloom Time: Late Fall to Early Winter

• Plant Height: 8–10 feet (2.5–3 meters)

• Spread: 3–4 feet (90–120 cm)

• Sunlight Requirement: Full Sun

• Soil Type: Well-drained, fertile soil with good organic matter

• Watering: Moderate; keep soil moist but not soggy

• Germination Time: 10–14 days

• Days to Maturity: 120–150 days

• Sowing Method: Start indoors 6–8 weeks before the last frost or direct sow after frost danger has passed

• Spacing: 24–36 inches apart

• Growing Season: Spring to Fall

• USDA Hardiness Zones: 8–11 (grown as annual in zones 3–7)

• Best Planting Months (by Zone):

  • Zones 3–5: May to June

  • Zones 6–8: April to May

  • Zones 9–11: February to April

• Use: Ornamental landscaping, garden borders, tall backdrops, and cut flower arrangements