Hungry rabbits may eat nearly any plant. Products to repel them offer mixed results. Fencing provides the only sure way to keep them from your flowers. However, rabbits avoid chewing on some flowers. According to Irene Shonle of Colorado State University, rabbits do not like flowers with strong odors, milky sap or thorns.
Daffodils (Narcissus Hybrids) - Daffodils come in several varieties, some with double petals, and in yellow or white. Although rabbits usually love spring bulbs, they will not eat the poisonous daffodil bulbs. Daffodils grow in sun or partial shade in most areas of the country. They also grow well in containers. The 6- to12-inch flowers bloom in early spring.
Daylily (Hemerocallis) - Although daylilies look delicate, they often escape gardens to thrive wild in surrounding areas. The many varieties produce flowers of several colors, and range in height from 6 to 48 inches. These perennials need some sun, but they also flower well in partial shade during the hottest part of the summer. Rabbits usually avoid these toxic flowers.
Iris (Iris spp) - Iris flowers grow from bulbs, and they are available in several colors and sizes. Most have a strong aroma that repels rabbits. Often used in borders and flowerbeds, iris flowers attract birds and hummingbirds. They need at least partial sun, and they grow well in most parts of the country.
Lamb's Ears (Stachys Byzantina) - Lamb's ears provide attractive perennial ground covers in sunny areas. The silvery-green soft leaves combine with pink spiky flowers during the summer. Although most plants remain at about 6 inches, some varieties grow up to 36 inches tall. Lamb's ears are drought-tolerant and like full sun, although they will tolerate some shade.
Lavender (Lavandula) - Often considered an herb, the lavender shrub produces sweet-scented flowers and foliage. The University of Maryland confirms that lavender may produce a slight sedative effect when inhaled. Crafters often dry the white or purple blooms for use in sachets or arrangements. Lavender plants may grow up to 3 feet tall. They are drought- and heat-tolerant and prefer full sun.
Yarrow (Achillea) - Yarrow plants are drought-resistant perennials that flower all summer. They flower in any shade of red, pink, yellow or white. Depending on variety, they grow from 1 to 3 feet tal, and they are often used for dried arrangements. Although easy to grow, yarrow spreads easily and may be hard to contain. Texas A & M recommends full sun and dry soil.