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Common
name: "Jacob's Ladder" or "Greek
Valerian"
Latin name: Polemonium caeruleum
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Zone: 4
- 8
Elevation to: 7500'
Growth habit: Clump forming
Max height: 12 - 36"
Spread: 12"
Flowers: Yes, May - July
Flower type: Cymes
Native to area: No
Available varieties: 1
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Pictured: P.
caeruleum 'Blue Whirl' |
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Cultivation:
Plant in partial shade in well drained soil. Adapts to most soil
types well. "Jacob's Ladder" is a prolific re-seeder.
Removed spent flowers to prevent spread. Flowers are good for
cutting.
Propagation:
Seed can be started in a cold frame or greenhouse in early spring
and moved outdoors after danger of frost has passed. For quicker
growth... purchase pre-started plants at your local Garden Center.
Established plants can be divided in spring.
Potential pests ~ diseases:
Powdery mildew. |
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