Find out how and when to prune holly bushes of all types to keep them looking their best. Holly plants range from petite shrubs to lofty trees, and some are evergreen while others are deciduous.

Sea holly is a perennial flower known for its striking purple-blue, thistle-like blooms that appear from midsummer to fall. With dark green leaves and an easy-care nature, it thrives in dry to medium ...

Most gardeners don't have good things to say about thistles. However, sea holly (Eryngium planum), also called flat sea holly, may change that opinion with its stunning steely-blue thistlelike flower ...