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Delphinium Pacific

Delphinium × elatum 'Pacific Giants'

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verifiedReviewed by the GreenScout Team

Tall, stately perennials renowned for their dramatic spires of large, semi-double flowers in shades of blue, purple, pink, and white. These cottage garden classics can reach 4–6 feet tall and bloom mid to late summer. They require staking and prefer cool climates with well-draining soil.

Common Problems

Select the problem your Delphinium Pacific is experiencing to get a treatment guide.

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Boltingchevron_right

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Yellow Leaveschevron_right

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Wiltingchevron_right

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Leggy Growthchevron_right

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Underwateringchevron_right

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Care Guide

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Light

Full sun (6–8 hours daily); partial shade in hot climates

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Water

Keep soil consistently moist during growing season; water at base to prevent fungal issues. Reduce watering in winter dormancy.

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Soil

Rich, well-draining loam with pH 6.5–7.5. Amend with compost or aged manure to improve fertility and drainage.

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Fertiliser

Apply balanced fertilizer (10-10-10) monthly during growing season, or use slow-release granules at planting. Reduce nitrogen to prevent excessive leaf growth.

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Temperature

Cool-season perennial; thrives in 60–70 °F. Struggles in heat above 85 °F; provide afternoon shade in warm zones.

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Humidity

Moderate humidity; ensure good air circulation to prevent fungal disease. Avoid overhead watering.

Toxicity

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All parts contain toxic alkaloids; ingestion causes burning sensation, salivation, diarrhea, and potential cardiac effects.

Common Diseases

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Common Pests

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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.

Frequently Asked Questions

Why does my Delphinium Pacific keep falling over?

These tall spires reaching 4–6 feet require staking — without support, the heavy flower spikes are prone to toppling, especially in wind or rain.

Is Delphinium Pacific safe to plant where pets graze?

No — all parts contain toxic alkaloids, and ingestion causes burning sensation, salivation, diarrhea, and potential cardiac effects, so keep it out of reach of pets and children.