Jacob's Ladder Seeds - Flower Plant

Jacob's ladder, botanically known as Polemonium caeruleum, is a herbaceous perennial plant valued for its upright growth and distinctive ladder-like foliage. It produces clusters of bell-shaped blue flowers during the growing season and thrives in temperate climates. This plant prefers partial shade to full sun and grows best in moist, well-drained, fertile soil. It is commonly used in borders, woodland gardens, and naturalized planting, where it establishes gradually from seeds under suitable conditions.

Features

• Upright perennial with distinctive ladder-like leaves
• Produces clusters of blue, bell-shaped flowers
• Suitable for borders and woodland garden settings
• Adapted to temperate climates
• Prefers moist, well-drained soil

Specifications

• Scientific name: Polemonium caeruleum
• Common name (US): Jacob's Ladder
• Seed type / variety: Blue flowering variety
• Growth habit: Upright, clump-forming perennial
• USDA zones: 3-8
• Planting season: Spring or fall
• Growing season: Late spring to summer
• Sowing Season:
  • Spring: March to May
  • Fall: September to October
• Germination time and conditions: 2-4 weeks at 15-20°C; may benefit from cold stratification
• Sunlight requirements: Full sun to partial shade
• Soil requirements: Moist, well-drained, fertile soil
• Watering needs: Moderate, consistent moisture
• Mature plant size: 30-90 cm height, 30-60 cm spread
• Plant spacing: 30-45 cm between plants