Add some jaw-dropping, steely-blue architecture to your garden with Eryngium 'Big Blue', also known as Sea Holly. This hardy perennial is a total star. In late summer, it sends up stiff, silvery-blue stems topped with large, conical, thistle-like flowers that glow with an intense, almost metallic blue hue – they're absolutely stunning, especially in the evening light. The spiky, grey-green foliage forms a neat mound at the base. Even after flowering, the dried seed heads stand tall through autumn and winter, looking magical when covered in frost. It's super tough, loves full sun and well-drained soil (perfect for gravel gardens), and is drought-tolerant once established. Bees and butterflies love it, and it's even won the RHS Award of Garden Merit! You get two well-established plants in 9cm pots from Thompson & Morgan. A must-have for a low-maintenance, high-impact garden.
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