For unbelievable ornamental onions, try these blue allium flowers. 1. Blue of the Heavens Growers are certain to delight in the precise color and form of this attractive blue globe onion.

Alliums, a type of ornamental onion, produce globe-shaped, pinkish-purple flowers that are a striking addition to any garden.

Often the star of the gardens at the RHS Chelsea Flower Show in May, alliums (ornamental onions) with their purple globes are a stunning sign of summer's imminent arrival. Bees adore them, too. There ...