Jacob’s Ladder. White flowers on upright clumps of bright green, fern-like foliage from late spring to mid-summer. Height 75cm. Spread 45cm. Prefers partial shade, moist well-drained soil. Hardy.
Polemonium caeruleum subsp. caeruleum f. album is a graceful hardy perennial with elegant white flowers rising above attractive fern-like foliage, making it an excellent choice for partially shaded borders and woodland-style planting.
PLANTING and AFTERCARE GUIDE
Best Planting Time
Spring: Plant in spring when the soil is workable and beginning to warm, allowing roots to establish before active growth.
Early Autumn: Early autumn is also an ideal planting time, giving the root system time to settle before the dormant season.
Site Selection
Sunlight: Polemonium caeruleum subsp. caeruleum f. album thrives in partial shade, although it will also tolerate gentle morning sun.
Soil: Moist, fertile, well-drained soil enriched with compost or well-rotted organic matter provides the best growing conditions.
Planting Instructions
Prepare the Hole: Dig a hole twice the width and the same depth as the root ball to allow the roots to spread comfortably.
Soil Preparation: Mix compost or organic matter into the excavated soil to improve fertility and moisture retention.
Planting: Position Polemonium caeruleum subsp. caeruleum f. album so the top of the root ball is level with the surrounding soil, then backfill gently and firm lightly.
Watering After Planting: Water thoroughly after planting to settle the soil and encourage strong root establishment.
Watering Requirements
Growing Season: Keep the soil evenly moist during active growth and flowering, particularly while the plant is establishing.
Established Plants: Once established, Polemonium performs best when the soil remains consistently moist but never waterlogged.
Feeding
Spring: Apply a balanced fertiliser in early spring to encourage healthy foliage and abundant flowers.
Mid-Season: A light supplementary feed can help Polemonium caeruleum subsp. caeruleum f. album maintain vigorous growth throughout the flowering period.
Pruning
Deadheading: Remove faded flower stems regularly to encourage a tidy appearance and possible repeat blooms.
Seasonal Care: Trim away damaged or tired foliage after flowering to maintain the plant’s attractive shape.
Mulching
Spring: Apply a generous layer of organic mulch around the base to conserve moisture, suppress weeds, and improve soil quality.
Later in the Year: Refresh the mulch as needed while keeping it clear of the crown to maintain healthy growth.
Supporting the Plant
Natural Habit: Polemonium usually has sturdy upright stems, although light support may be beneficial in more exposed locations.
Final Tips
Polemonium caeruleum subsp. caeruleum f. album is a hardy, low-maintenance perennial that adds elegance, texture, and seasonal interest to partially shaded gardens. With moist, fertile soil and simple seasonal care, this Polemonium will reward you with beautiful blooms year after year.
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