Purple Wave Petunias. One of the top 10 foolproof plants for kids. ATTRACTS:Monarch Butterflies and Ruby Throated Hummingbirds. An annual that prefers full sun. Can be planted in hanging baskets or under birdbaths. Perfect planted on hills and slopes. Plant with Wild Petunias which attract White Peacock Butterflies. Look awesome planted in old stumps, in boots or in window boxes.