Sweet Pea

Lathyrus odoratus

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verifiedReviewed by the GreenScout Team

An annual climbing vine producing fragrant, butterfly-shaped flowers in a wide range of colors. Sweet peas bloom prolifically when deadheaded regularly and prefer cool growing conditions, making them ideal for spring and autumn gardens.

Common Problems

Select the problem your Sweet Pea is experiencing to get a treatment guide.

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Yellow Leaveschevron_right

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Slow Growthchevron_right

Care Guide

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Light

Full sun (6–8 hours daily) promotes flowering; tolerates partial shade in hot climates.

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Water

Water regularly and deeply, 1–2 inches per week. Keep soil consistently moist but not waterlogged; avoid wetting flowers.

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Soil

Well-draining, fertile loam enriched with compost or well-rotted manure. pH 6.0–7.0 is ideal.

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Fertiliser

Apply balanced fertilizer (10-10-10) monthly or use slow-release granules at planting; avoid excess nitrogen.

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Temperature

Cool-season annual; prefers temperatures 55–70°F. Plant in early spring or fall; struggles in hot summers.

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Humidity

Moderate humidity preferred. Ensure good air circulation to prevent fungal diseases.

Toxicity

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Seeds and pods contain lathyrogens, which are toxic if ingested in quantity. Can cause lathyrism (neurolathyrism) with prolonged consumption.

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

Is Sweet Pea safe to eat like garden peas?

No — despite the name and pea-like appearance, its seeds and pods contain lathyrogens that are toxic if ingested in quantity and can cause lathyrism with prolonged consumption; it's grown strictly as an ornamental.

How do I get more flowers from my Sweet Pea vine?

Deadhead regularly — Sweet Peas bloom prolifically when spent flowers are removed promptly, which also prevents the plant from putting energy into seed pod production instead of new blooms.