How to grow Sea Holly

Eryngium planum

Full Sun
Low

Established clumps ca be divided in the spring

Growing Sea holly from seed

Can be grown from seed but it easier to divide an established clump in the spring. Use potting compost mixed equally with vermiculite to improve drainage

Soil temperature should be kept higher than 10°C / 50°F to ensure good germination.

By our calculations*, you should look at sowing Sea holly about 56 days before your last frost date .

Transplanting Sea holly

Choose a bright sunny well drained position in the middle to the back of the border.

Ensure that temperatures are mild and all chance of frost has passed before planting out, as Sea holly is a hardy plant.

How long does Sea holly take to grow?

These estimates for how long Sea holly takes to sprout, grow and harvest are from real observations from real gardeners, right around the world.

Days to Germination How long does it take Sea holly to germinate?: 75 days
Average 75 days | Min 75 days | Max 75 days (1)
Days to Transplant How long until I can plant out Sea holly?: + 80 days
Average 80 days | Min 80 days | Max 80 days (1)
Days to Maturity How long until Sea holly is ready for harvest / bloom?: + days
Average days | Min days | Max days (0)
Total Growing Days How long does it take to grow Sea holly?: = days

When should I plant Sea holly?

Our when to plant Sea holly estimates are relative to your last frost date.

When to sow The number of days to sow Sea holly before or after your last frost date.: 56 days before Last Frost Date

Sea holly Etymology

The Latin word “Americana” means “of the Americas”.¹

Other names for Sea holly

Blue sea holly, Eryngium

Eryngium planum L.

Footnotes

¹ Latin Dictionary