Pruning guide

How to prune alpine sea holly

Best time

Late winter to early spring for annual cut-back; late summer for deadheading

How often

Once annually; optional deadheading in late summer

Technique

Using sharp secateurs, cut all dead stems back to the basal rosette in late winter. Avoid disturbing the crown or cutting into the rootstock, as eryngiums dislike root disturbance.

More alpine sea holly care

Pruning alpine sea holly — FAQ

When should I prune alpine sea holly?

Late winter to early spring for annual cut-back; late summer for deadheading. Using sharp secateurs, cut all dead stems back to the basal rosette in late winter. Avoid disturbing the crown or cutting into the rootstock, as eryngiums dislike root disturbance.

How often does alpine sea holly need pruning?

Once annually; optional deadheading in late summer. Alpine Sea Holly (Eryngium alpinum) requires little pruning. Remove spent flower heads in late summer if you want to prevent self-seeding, or leave them for winter structural interest. Cut all stems back to the basal rosette in late winter or early spring as new growth begins.

How do you prune alpine sea holly?

Using sharp secateurs, cut all dead stems back to the basal rosette in late winter. Avoid disturbing the crown or cutting into the rootstock, as eryngiums dislike root disturbance.