The leaves of lavender are typically gray-green in color, adorned with fine hairs that give a soft texture. They vary in form, appearing either simple or pinnately toothed, and can be intricately dissected in some species. Leaf shapes include both elongated and narrow forms, measuring approximately 1.5 to 2.5 inches (4 to 6 cm) in length. The essential oils contained within the leaves are a distinctive feature, contributing to their aromatic properties essential for identification.

Lavender flowers typically form whorls on spikes rising above the foliage. They are predominantly purple to lilac, with some cultivars displaying white blossoms. The tubular calyx and corolla each exhibit 5 lobes, contributing to the flower’s distinctive appearance. These flowers generally measure about 0.4 to 1 inch (1 to 2.5 cm) in length, and they emit a strong, pleasing fragrance. Blooming primarily in mid to late summer, they attract pollinators such as bees and butterflies.

The stem of lavender is distinguished by its square shape and green-gray coloration. It often exhibits a somewhat angular appearance, typical of the mint family. The texture is slightly rough, and the stems can measure up to 2 feet (60 cm) in height. They are typically less than an inch (2.5 cm) thick. The branching pattern is opposite, with newer stems appearing softer and green, gradually becoming woody and grayish as they age.

The fruit of lavender is a type of dry capsule that typically does not catch the eye for ornamental purposes. Upon reaching maturity, these fruits consist of small, dry, brown structures which house the seeds. The capsules are generally ovoid to oblong in shape and measure about 1/8 to 1/4 inch (3 to 6 mm) in length. The exterior of the capsule has a fine, papery texture and might split into sections when the seeds are ripe, releasing them for potential germination. These characteristic fruit capsules follow the flowering period and are a crucial part for the plant's reproductive cycle.