Climbing tendrils carry waves of intensely fragrant butterfly flowers in spring, unbeatable for picking. Traditionally sown around St Patrick's Day; the seeds and pods are toxic if eaten.
At a glance
- Plant type: Climber
- Mature size: 2 m H × 30 cm W
- Aspect: full sun
- Water: regular, moderate watering
- Frost: hardy
- Maintenance: moderate maintenance
- Origin: Exotic
About Sweet Pea
Lathyrus odoratus is a fast-growing climber in the Fabaceae family. It reaches around 2 m tall and 30 cm wide at maturity, with deciduous foliage. Pink, purple, red, white and blue flowers appear in winter and spring.
Where to grow Sweet Pea
Sweet Pea suits cool-temperate, warm-temperate and Mediterranean climates and grows best in full sun. It is frost hardy and shrugs off cold winters.
Soil & planting
Most soils suit Sweet Pea provided drainage is reasonable. Plant into well-prepared ground, firm the soil around the roots and water deeply to settle it in.
Watering & feeding
Sweet Pea does best with regular, moderate watering. Feed as new growth begins, following the rate on a balanced garden fertiliser. Check moisture below the mulch during establishment and water thoroughly when needed rather than following a rigid schedule.
Pruning & care
Prune Sweet Pea after flowering to keep it compact and encourage the next flush of blooms. For most gardens, maintenance is moderate maintenance.
Using Sweet Pea in the garden
Sweet Pea earns its place for cut flowers for the vase, its fragrance, feeding bees and pollinators and a feature or specimen planting.
Companion planting & design
Sweet Pea sits most comfortably beside plants adapted to regular, moderate watering and cool-temperate climate. A small cluster gives stronger visual impact than isolated plants scattered through the garden.
Good to know
Note that it is toxic to cats and dogs, so site it away from pets that chew. All parts can be toxic if eaten, so keep it away from small children.
Buying Sweet Pea
Plant Sale lists Sweet Pea as seed. Availability is confirmed when you request a quote; use the panel above to register interest.
Prefer to grow it yourself? See the Sweet Pea seed sowing guide for depth, timing and germination.
