Blue Eryngo

How to grow Blue Eryngo

Written by the GardenDecoded editorial team · Last reviewed 21 July 2026 · Written for UK gardens · How we research our guidance

Planting

Plant in spring in full sun with free-draining soil; gravel gardens and dry sunny borders suit it. It makes a long taproot and dislikes being moved, so plant young and leave it alone. Rich or damp soil produces floppy stems and short-lived plants.

Pruning

Leave the stems and cone-like heads standing through winter, as they dry well and hold their shape. Cut back to the basal rosette in early spring. Deadheading during the season is only needed if you want to limit self-seeding.

Propagation

Root cuttings in winter are the most reliable method. Seed germinates after a cold period but is slow. Division is possible in spring, though the taproot makes it awkward.

Pests and diseases

Slugs on young growth in spring. Root rot in poorly drained soil is the main killer; pests are rarely an issue.

Value to wildlife

Bees, hoverflies and wasps work the flowerheads heavily in high summer, and the dried heads give winter shelter to insects.

Notes

Drainage is everything. If your soil is heavy clay, grow it in a raised bed or a large gritty container rather than fighting the ground.

This guidance was researched and written by GardenDecoded — see our editorial policy for how guides are checked and reviewed.

Other names for this plant

These names have all been used for Eryngium planum but are no longer the accepted name. You may still meet them on old labels, in books, or in nursery catalogues.

Others in Eryngium