Rosemary, alias Ai Ju, is a world-famous perfume plant, native to the Mediterranean coast. Its plant shape is beautiful, the color is charming, and the whole plant is full of fragrance, which not only has ornamental value, but also beautifies the environment, and the fragrance is overflowing, which can drive away mosquitoes and flies. The rich aromatic smell can refresh people, and has the functions of refreshing, enhancing memory and regulating human emotions.

Rosemary is a perennial aromatic plant in Labiatae, with a plant height of 30 cm in the basin and 50-80 cm underground. Its stem is erect and multi-branched, and its leaves are lanceolate or linear, 2.5-3 cm long and 0.2 cm wide. Its surface is dark green and its back is silver gray. It blooms in spring and summer with purple, white, yellow or pink lip-shaped flowers; Nutlets, black seeds, 1000-grain weight1.1g.

Rosemary has strong adaptability, drought tolerance and barren tolerance, and is not strict with soil requirements. The cold tolerance is poor, so it is necessary to cover the soil and protect the roots in winter in the cold areas in the north to facilitate the wintering. Seeds are difficult to germinate and the germination rate is low. Before sowing, the seeds should be soaked in warm water at 30℃ for 8- 12 hours, and the surface mucosa should be rubbed off. The seedbed must be carefully leveled, covered with a small amount of fine soil after sowing, and covered with plastic film for heat preservation and moisture retention. When the seedlings grow to 6-8 true leaves, they can be transplanted, potted or planted in the ground. After the seedling is delayed, the main stem is picked at the height of 15 cm, and the lateral branches can be harvested at the height of 30 cm.