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Clerodendrum trichotomum is a shrub or small deciduous tree originating in China and Japan, which can reach 2.5-3 meters in height.
It has an erect habit, often has several very branched trunks, the crown is rounded, and develops very low along the trunk. The leaves of the clerodendro they are oval, very wide, serrated and velvety, dark green.
In midsummer, until the beginning of autumn, this plant produces numerous small white flowers, gathered in panicles, delicately scented; to the withered flowers follow very decorative berries, of blue-black color, supported by a deep pink calyx; they can stay on the plant for months. The genre Clerodendrum (or clerodendron) includes hundreds of species, among which we mention the C. ugandense, less rustic than the Clerodendrum trichotomum, but very decorative, with numerous purple and lilac flowers in the shape of a butterfly; C. thomsonae is a white flowered creeper.
The clerodendro needs a sunny position, or in partial shade; it is usually a very rustic plant and can easily withstand temperatures below -10 ° C, although it can happen that persistent frosts cause the aerial part of young specimens to dry out; for this reason, it is advisable to repair the plants for the first two winters after planting.
It has no particular problems in withstanding the summer temperatures, obviously it can suffer from prolonged exposure to excessive temperatures.
In areas near the sea or in the mountains it is good to repair the plant from the wind.
In general, clerodendrons need regular watering, and constantly moist soil; also the Clerodendrum trichotomum needs a lot of water, especially in summer, while in winter the watering can be suspended because the plant enters in vegetative rest.
It is necessary to prevent water from forming on the ground as they can be very dangerous for the health of the plant.
Plants love a humid environment and it can be useful to vaporize water that allows to create a humid microclimate.
From March to October it is advisable to provide fertilizer for flowering plants at regular intervals.
The clerodendron adapts without any problem to any soil, but develops best in rich, loose, fresh and well-drained soils, preferring calcium-poor soils.
When planting it, preferably in spring, it is advisable to prepare a deep hole in which to mix sand, peat and composting soil.
The multiplication of this type of shrub occurs by seed, using in the spring the seeds of the previous year, which can be taken from the plant at the time of sowing; in spring it is also possible to practice cuttings and layering.
Clerodendro - Clerodendrum trichotomum: Pests and diseases
If the plants are planted in poorly draining soils it is good to favor the onset of root rot. Mites sometimes conspicuously ruin the leaves.
These plants can be attacked by scale insects, which if not countered can compromise the health of the plant. To avoid this it is advisable to use specific insecticide products to be distributed in the environment around the plant, before the flowering period.