Sea Holly

Sea Holly is a striking biennial that thrives in coastal conditions, producing spiny, thistle-like blue-grey flowers. It's an excellent choice for adding architectural interest to sandy or gravel gardens, and its dried flower heads are popular in arrangements.

Sun: Full sun.

Soil: Well-drained, poor to moderately fertile, sandy soils.

Hardiness: H5 — down to −15°C.

Flowering: Jul, Aug, Sep.