chrysanthemum 'Sea Urchin'

Korean chrysanthemums are borderline hardy. Overwinter more tender cultivars in a cold frame. Needs a sunny site with moderately fertile, well-draining soil. See chrysanthemum cultivation

Cut down after flowering

May be propagated by division in late spring or by cuttings

May be susceptible to chrysanthemum leaf miner, glasshouse whitefly and aphids

Susceptible to chrysanthemum white rust, powdery mildews and grey moulds