'Blue Hobbit' Sea Holly produces silvery blue spiky globe flowers on short stems in summer. The blooms are a very unusual shape and color, emerging from a low mound of green basal foliage. All the Eryngiums must have excellent drainage and do best in dry sites. 'Blue Hobbit' is much more compact than other Eryngiums, so it would work well in rock gardens. Butterflies love the odd flowers, and happily, deer do not.