General
Sweet pea (Lathyrus odoratus) is a climbing annual grown for its highly fragrant and colorful flowers. It is a classic cottage garden plant that blooms over a long period when regularly picked. It climbs using tendrils and needs support to grow well.
Light
Full sun to partial sun; best flowering in full sun with cool root conditions.
Soil type
Deep, fertile, well-drained soil enriched with compost; prefers moisture-retentive but not waterlogged soil.
Water requirement
Moderate to high; keep soil evenly moist, especially during flowering.
Nutrient requirement
Moderate; benefits from compost and balanced feeding, but avoid excess nitrogen.
Precultivation
Sow seeds indoors in late winter or early spring. Soaking or nicking seeds can improve germination. Keep seedlings cool and well-lit to prevent legginess. Harden off before planting out.
Planting
Plant out in early spring when soil is workable. Choose a sunny site with deep, fertile soil. Provide strong supports at planting time. Space plants about 20–30 cm apart.
Pruning
Pinching young plants encourages branching and more flowering stems. Remove faded flowers regularly to prolong blooming.
Maintenance
Water regularly to keep soil evenly moist. Mulch to keep roots cool. Feed moderately during the growing season, avoiding high nitrogen fertilizers. Tie plants to supports as they grow.
Harvest
Harvest flowers frequently for bouquets. Cutting stems regularly encourages continuous flowering throughout the season.
Common issues
Powdery mildew in dry conditions, aphids on young growth, and poor flowering in hot weather. Keep plants well-watered and spaced for airflow.
Rotation schedule
Rotate every 3–4 years with other legumes to reduce soil-borne issues.
Pollination
Insect-pollinated; attracts bees.
Companion plants
Climbing beans, roses, nasturtium, calendula, and other cottage garden flowers.
Incompatible plants
Avoid overcrowding and very dry or nutrient-poor conditions.
