Some species, originating in China and Asia, belong to the kolkwitzia genus; the Kolkwitzia of China is a shrub of medium size, with deciduous leaves, of round shape.
Develops a short, densely branched stem, with slightly arched branches; the foliage is dark green, becoming yellowish in autumn, before falling.
In spring along the stems it produces numerous bunches of trumpet flowers, white or pink, with a golden yellow throat.
The flowering is very showy and lasts a few weeks.
To obtain a dense shrub every year, it is advisable to intervene after pruning by shortening the stems by about a third; this practice also prevents the shrub from tending to empty in the lower part with time.
The ideal substrate for the cultivation of the amabilis variety is light, very well drained, rich and soft; before planting the shrub we work the garden soil well, adding sand, universal soil and a small amount of organic fertilizer or humus. All this to avoid possible stagnant water that could compromise health.watering
The Kolkwitzia amabilis provides irrigation with regularity during flowering, but only if the spring is not very rainy, while during the rest of the vegetative season we water only sporadically, or in case of prolonged drought and prolonged exposure on hot summer days. We avoid watering during the cold season. However, it is advisable to keep the soil moist between one watering and another.
The multiplication of Kolkwitzia amabilis can be carried out by dividing the tufts in the autumn, or in July and August by cutting the semi-woody branches. From the lateral branches cuttings of about 25-30 cm are taken, with heel, and they are planted in a mixture of peat and sand. When the cuttings have rooted, they are transplanted in the nursery in April-May of the following year and are cultivated for more than a year to plant them in October so as to have seedlings with good resistance.
Kolkwitzia of China - Kolkwitzia amabilis: Pests and diseases
The amabilis species is robust enough but can be attacked by fungal diseases if it lives in a damp environment and with stagnant water. In the spring season, before the development of flowering buds it is advisable to adopt a systemic fungicide treatment, so as to counteract the possible effects of the humid climate; while at the end of winter it is useful to use a broad-spectrum insecticide product to prevent attacks by aphids and parasites; all treatments must always be carried out when there are no blooms in progress.