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Larkspur 'Giant Imperial'
Larkspur 'Giant Imperial'
Seed Packet

Larkspur 'Giant Imperial'

Consolida ajacis
Tall spikes of double flowers in beautiful shades of blue, violet, rose, red, lavender, salmon, pink and white fill my garden in late spring and summer. The blossoms have upward curving spurs on the back, hence their common name and many old variations, such as Lark's Heels and Knight's Spur. I offer the full array of colors, including the All-America Selections Winners 'Blue Bell', a pastel blue from 1934, and 'White King' from 1937. Self-sows.
SKU #S315
Caution: Poisonous. The purchaser assumes all liability related to the use of this product.
Approximate Seeds Per Packet
Annual Hardiness
Hardy Annual
Mature Size
3-4' h x 1-1.5' w
Full sun
Rich, well-drained
Spring to summer
Spikes of blue, violet, rose, red, lavender, salmon, pink, and white
Great Cut Flower
Deer Resistant
Attracts Butterflies
Attracts Bees
Attracts Hummingbirds
1/8"; needs darkness to germinate.
Sprout Time:
20-35 days
Seed To Bloom:
14 weeks
Starting Indoors:
Not recommended.
Starting Outdoors:
Recommended. Direct sow in early spring 3-4 weeks before last frost, or early autumn in zones 7-10.
Larkspurs are popular cut flowers, as they are equally beautiful fresh or dried. These flowers are prized for their varied hues, from jewel tones to misty pastels, as well as their tall and upright growth and graceful foliage. They are welcome in early summer gardens, where they bestow a much-needed vertical element. When planting larkspurs, allow enough space between plants to ensure good air circulation. Additionally, mulch around the plants to keep the soil cool, leaving a space around the stems uncovered. They perform best where summer nights cool down. Caution: all parts contain toxic alkaloids.
Final Spacing:
Water Requirements:
Medium Water Use
Watering Details:
Water regularly, particularly during dry periods, but avoid saturated soils. Somewhat drought tolerant, but best flowering with regular water.
Soil pH:
Slightly acidic to slightly alkaline; if soil is very acidic, add lime before planting.
Mix in 2-4" of compost prior to planting.
Diseases & Pests:
Susceptible to fungal problems in poorly drained locations, or where foliage stays wet. Space to allow for good air circulation and use organic fungicides if needed.
When to Cut for Bouquets:
Harvest when 2-5 florets are open.