Polemonium
Polemonium caeruleum
flowerPolemonium caeruleum, commonly known as Jacob's ladder, is a charming cottage garden perennial with soft blue or occasionally white flowers and distinctive ladder-like compound foliage. It typically blooms in late spring to early summer and self-seeds readily, creating naturalized drifts in borders and woodland settings. The plant is easy to grow and supports pollinators.
Common Problems
Select the problem your Polemonium is experiencing to get a treatment guide.
Care Guide
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Light
Partial shade to full sun; tolerates dappled shade and performs well with 4–6 hours of sunlight
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Water
Keep soil consistently moist, especially during growing season; drought-tolerant once established
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Soil
Well-draining soil with organic matter; prefers slightly moist, fertile soil; pH 6.0–7.0
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Fertiliser
Light feeding in spring with balanced fertilizer; generally not heavy feeders
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Temperature
Cool-season perennial; thrives in 50–70°F; dislikes hot, humid summers
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Humidity
Moderate to high humidity; appreciate consistent moisture in warm climates
Toxicity
check_circleSafe for Catscheck_circleSafe for Dogscheck_circleSafe for Children
Non-toxic to humans and pets
Common Diseases
Common Pests
Seasonal Care
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Resume regular watering and feeding as growth picks up.
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Peak growing season. Water and feed regularly.
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Reduce watering as growth slows. Stop heavy feeding.
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Minimal watering and feeding. Protect from frost if needed.