← Back to plant explorer
Sweet pea illustration
Flowers · Annual

Sweet pea

Lathyrus odoratus

Fragrant, ruffled flowers rise among paired leaves and curling tendrils.

Make it part of your growing collection.

A LITTLE EVERYDAY CARE

Help it thrive.

A few things worth knowing.
01

Provide climbing support

Train climbing varieties onto canes, twigs or a trellis.

02

Pick flowers regularly

Cut flowers or remove faded blooms to encourage more flowering.

03

Choose fertile, draining soil

Plant in full sun and avoid both waterlogged and excessively dry soil.

Care guide · RHSSource checked 20 Sept 2026 · Adapt timing to your climate and variety.
A PLACE TO THRIVE

Growing essentials.

Sunlight
6+ hours of sunSource-backed
Moisture
Moderate moistureSource interpretation
Soil pH
Not verifiedExcluded from score
Drainage
Free-drainingSource interpretation
Nutrients
Not verifiedExcluded from score
Soil texture
Not verifiedExcluded from score
Plant spacing
≈ 30 cmPlanning estimate
Growing depth
≈ 30 cmPlanning estimate
Typical height
≈ 200 cmPlanning estimate
Growing season
cool-season / warm-seasonPlanning estimate

Source-backed preferences and planning estimates are labelled separately. Missing values are not treated as a match. Spacing and depth still depend on cultivar and growing method.

Data sources & uncertainty
Sunlight

Full sun is preferred; 6+ hours is a category, not an upper tolerance limit.

Source · checked 2026-09-20
Moisture

Qualitative watering guidance is mapped to this interval for active growth; it is not a watering schedule.

Source · checked 2026-09-20
Soil pH

No precise preferred numeric interval verified; the unused placeholder is excluded from display and scoring.

Source · checked 2026-09-20
Drainage

Free drainage or avoiding waterlogging is recommended; the ordinal interval is an interpretation, not a measured drainage rate.

Source · checked 2026-09-20
Nutrients

No comparable numeric nutrient requirement verified; excluded from scoring.

Source · checked 2026-09-20
Soil texture

No specific soil textures verified; excluded from scoring.

Source · checked 2026-09-20
Plant spacing

Simplified square planning allowance; variety, row layout and growing method change the space needed.

Source · checked 2026-09-20
Growing depth

Approximate planning allowance, not a verified root depth; cultivar and growing method change the requirement.

Source · checked 2026-09-20
Typical height

Approximate planning height; cultivar, pruning and growth stage change the result.

Source · checked 2026-09-20
Growing season

Broad growth category, not a local planting calendar; excluded from scoring.

Source · checked 2026-09-20