Overview

Smyrnium connatum is a clump forming annual biennial in the genus Smyrnium, part of the Apiaceae family, with deciduous foliage. Smyrnium connatum grows best in full sun and partial shade, and tolerates most soils and any pH. Its UK hardiness is rated H6. Suggested uses include coastal, cottage and informal garden, wildlife gardens and flower borders and beds.

About

Smyrnium connatum is a clump-forming cultivar of the Smyrnium genus, which comprises upright, branching biennials with broad, lobed lower leaves and rounded upper foliage. This deciduous plant produces branched umbels of small, greenish-yellow flowers in late spring and early summer. It thrives in fertile, well-drained soils of various types, including chalk, clay, loam, and sand, and prefers full sun to partial shade in sheltered, south-, west-, or east-facing aspects. Hardy to UK zone H6, it is suitable for coastal, cottage, wildlife gardens, and flower borders.

Growing conditions

Best soil and position for Smyrnium

Sunlight

Full sun, Partial shade

Soil type

Chalk, Clay, Loam, Sand

Soil pH

Acid, Alkaline, Neutral

Soil moisture

Moist but well-drained, Well-drained

Aspect

South-facing, West-facing, East-facing

Exposure

Sheltered

UK hardiness

H6

Plant details

Smyrnium connatum size, habit and characteristics

Plant type

Annual Biennial

Habit

Clump forming

Foliage

Deciduous

Suggested uses

Coastal, Cottage and informal garden, Wildlife gardens, Flower borders and beds

Care notes

Pruning and caring for Smyrnium connatum

Propagation

Seed

Pest resistance

Generally pest-free

Disease resistance

Generally disease-free

Frequently asked questions