Rose campion is unforgettable in full bloom because of its abundant hot-pink flowers. But before it puts on its floral show -- and after the flowers fade -- its silvery-gray leaves are ornamental on their own. Note: Rose campion can self-seed abundantly;
How to grow alliums, what variety to choose. Not susceptible to any serious plant diseases or pests and even ornamental alliums are deer and rodent resistant because they are technically members of the onion family.