Elm (scientific name: Ulmus pumila L.) is a plant of the elm family and the elm genus. It is known as "elm lumps". It is a deciduous tree of the elm family. The bark of the young tree is smooth, grayish brown or light gray, and the skin of the big tree is dark gray, irregular deep longitudinal crack, rough; Branchlets glabrous or hairy, without swollen cork layer and raised cork wings; Winter buds are nearly spherical or ovoid. The leaves are elliptic and ovate, the leaf surface is smooth and glabrous, the back of the leaves is pubescent when young, and becomes glabrous later or there are tufted hairs in some vein axils, and the petiole surface is pubescent. The flowers are opened at the first leaf and clustered in the leaf axils of the branches. Samara sparse obovate round. The flowering and fruiting period is from March to June (later in the northeast).

Curing method:

Elms have strong habits and can be managed extensively: they can be placed in places with sufficient light and good ventilation to maintain the basin soil moist without ponding. When the air is dry in summer, a little water should be sprayed on the plants to increase the air humidity and make the leaves fresh. Apply the decomposed thin liquid fertilizer once every 20 days or so. Elm has strong germination power and fast growth. Regular pruning can maintain the beautiful shape of the tree. And can increase the light transmittance of the plant.