Gardeners have so many reasons to plant lavender. This sun-loving perennial produces fragrant purple flower spikes that perfume that garden air and attract butterflies. It blooms from early summer to frost, so you'll have months of enjoyment. Lavender flowers are often dried for potpourri and sachets. It also contains essential oils that are used for cooking, creams and perfumes. Lavender is a deer-resistant perennial that can be grown in herb and perennial gardens. It looks stunning when grown as a low hedge near a walkway or massed. Most lavender plants grow about 20 inches tall and are suitable for zones 5-9. It performs best when it receives at least six hours of direct sunlight daily.