China is cultivated in the north and south, and potted in the north.
Nerium oleander is famous for its lush flowers, graceful posture and long flowering period.
Suitable for planting green belts, shaping hedges or being used in barren slopes; It can also be woven into tree screens, scenic doors and memorial archways in gardens for beautification and decoration; It is a good tree species for greening in factories and mines because of its strong smoke resistance, poison resistance and dust resistance.
Plants are poisonous and should be used with caution in kindergartens and children's parks.
Nerium oleander is an evergreen shrub or small tree, 5 meters high and milky white.
Trigeminal branches, old branches grayish brown, branchlets green or purple.
Leaves 3-4 in whorls, narrowly lanceolate, entire.
Cymes are terminal, with fragrant flowers and funnel-shaped corollas, deep red or pink.
Flowering: June ~ 65438+ 10.
Common cultivated varieties are oleander with white flowers; Nerium oleander with mottled leaves and red flowers; Double oleander, double flower; Purple oleander with purple flowers; Orange oleander with orange-red flowers; Pink oleander and pink flowers.
Nerium indicum likes warm and humid climate, is cold-resistant, and can safely overwinter above 0℃ in winter.
Drought and barren tolerance, avoid waterlogging.
Like light, a little tolerant of shadows.
The soil requirement is not strict, but it grows well on fertile and well-drained slightly acidic to slightly alkaline soil.
It has strong resistance to toxic gases such as sulfur dioxide.
Nerium oleander is dry, with weak stratification, many branches, oblique branches and strong sprouting.
It germinated in April and differentiated in that year.
Although the tree is an evergreen tree, it is not suitable for pruning in the growing period because of its juicy body. Setting and maintenance pruning are carried out in winter or early spring.
Because oleander has many branches and strong sprouting ability, the natural tree shape is shrub-like, and the plastic way usually adopts skeleton shrub-like.
If the branch situation is unreasonable, it can be corrected by changing the head.
If you want to cultivate oleander into the shape of a tree, you can shape it in a number of closed hearts, and the plastic belt depends on your needs.
Maintenance and pruning mainly focus on sorting out miscellaneous branches, thinning old branches, long branches and weak branches, and applying head-changing technology to make the distribution of branches reasonable.
Because flower buds are easy to differentiate, they can bloom as long as they are not too strong or too weak.