sea holly Eryngium planum Type:perennials that last Notable Traits:attracts butterflies/pollinators, great cut flowers, resistant: deer, resistant: disease, resistant: rabbit, tolerates clay soil, tolerates harsh roadside conditions Hardiness:Zone 4 – 9 Mature Height:24-36in Light:sun (8+ hrs) Water:drought tolerant Bloom Color:blue Bloom Shape:globe Bloom Time:summer Foliage:blue Description An outstanding hardy unusual ornamental that thrives in hot dry locations and blooms in summer with tall stems of spiny, glistening blue flowers.