This eye-catching perennial produces stunning thistle-like small blue flowers surrounded by a spiky bright blue collar. Also known as Sea Holly, Eryngium planum is adored by pollinators and blooms from July to September. It copes perfectly well in dry, hot and coastal conditions and is ideal for adding some texture to your sunny garden borders or as a beautiful addition to your wildlife garden. This eryngium also makes an exquisite cut flower either fresh or dried.