Eryngium pandanifolium

Giant sea holly is a perennial herbaceous plant that loves sun and is native to open habitats, commonly growing in meadows and grasslands. It prefers full sun but can also tolerate partial sun.

Giant sea holly shows good temperature adaptability, tolerating high heat and considerable temperature fluctuations. In hot conditions, care should be taken with watering and providing adequate shade to avoid sunburn. Conversely, Giant sea holly is relatively sensitive to low temperatures. While it can endure some cold, excessively low temperatures may cause frost damage.

Usually a single fertilizer application in spring is enough for Giant sea holly, though repeated feedings can help achieve maximum growth. Feed it about once a month to once every month and a half. Fertilizing improves the leaves’ appearance and function, maintaining even color and a healthy texture. It also encourages root development and nutrient uptake, supporting long-term plant health.

To ensure the Giant Sea Holly thrives, perform pruning in early spring. This helps manage its size and boosts flowering. Removing dead stems improves air circulation and overall plant health. Additionally, hard pruning can rejuvenate overgrown plants, promoting a neat appearance and vigorous growth.