Eryngium Agavifolium


1 in stock

SKU: eryngium-agavifolium Category:
Common Name: Sea Holly
Size: 2-3 litre
Hardiness: H4
Hardiness Ratings

All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees ˚C) are shown in brackets

  • H1a: under glass all year (>15˚C)
  • H1b: can be grown outside in the summer (10 - 15 ˚C)
  • H1c: can be grown outside in the summer (5 - 10 ˚C)
  • H2: tolerant of low temperatures, but not surviving being frozen (1 to 5 ˚C)
  • H3: hardy in coastal and relatively mild parts of the UK (-5 to 1 ˚C)
  • H4: hardy through most of the UK (-10 to -5 ˚C)
  • H5: hardy in most places throughout the UK even in severe winters (-15 to -10 ˚C)
  • H6: hardy in all of UK and northern Europe (-20 to -15 ˚C)
  • H7: hardy in the severest European continental climates (< -20 ˚C)
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2-3 Litre Pot

  • Position: Full sun
  • Soil: Moist, well drained
  • Growth Rate: Average
  • Flowering Period: August
  • Hardiness: H4
  • Eventual Height: 1.5m
  • Eventual Spread: 0.5m

Eryngium Agavifolium, also known as the ‘Agave-Leaved Sea Holly’, is a striking and unique perennial plant that is native to Mexico. It is known for its sword shaped leaves that resemble those of an Agave plant, as well as its small greenish white flower heads that appear in late Summer.  This plant is very much valued for its architectural foliage.

This plant is drought-tolerant and easy to care for, making it a great choice for rock gardens. It can reach up to 1.5 metres in height and 0.5 metres width, and prefers full sun.

In addition to its ornamental value, this Eryngium has a rich history of medicinal uses among indigenous cultures in Mexico. The plant’s leaves and roots have been used to treat a variety of ailments, including fever, pain, and digestive issues.

How to care for your Eryngium Agavifolium

  1. Light: Prefers full sun, but can tolerate some shade.
  2. Water: The plant is drought-tolerant and can survive on very little water. However, it is best to water it occasionally during prolonged droughts.
  3. Soil: The plant prefers moist, well-draining soil, but can tolerate a wide range of soil types.
  4. Fertiliser: Does not require regular fertilisation. If you decide to fertilise, it is best to do so in the Spring, using a balanced fertiliser.
  5. Pruning: Does not require regular pruning. You can cut back the dead flowers in late Autumn or early Spring..
  6. Winter protection: It is hardy and can withstand temperatures as low as -10°C. However, it is best to provide it with a mulch layer to protect the roots from cold.

By following these tips, you can ensure that your Eryngium Agavifolium will be healthy and thrive in your garden.

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