The genus jasminum counts numerous species of climbing or erect shrubs, with yellow or white tubular flowers; the jasminum officinale is a climbing plant, widespread in Asia and Europe, cultivated for its flowers: from spring to late autumn it produces numerous small white, tubular flowers, which open at the apex and give off an intense heady scent; together with jasminum officinale we also find other species in the garden, with similar characteristics, also originating from Asia, the Mediterranean area or Africa. Among the most widespread species are J. sambac, J. polyanthum, J. nitidum, J. multiflorum.
In any case we are dealing with vigorous creepers, which produce a dense vegetation of twining branches, which develop by twisting around whatever support they find, the leaves, various sleeping; they are dark green, shiny and slightly leathery, evergreen. In the Mediterranean area, jasmine is used outdoors to cover pergolas or trellises, which are filled with flowers for months.
In general these are fairly rustic plants, which tolerate the cold well, even if they fear intense and prolonged frost; in areas with a winter climate lite are garden plants, where they can produce highly developed and large-scale creepers; in areas with cold winters these are delicate plants, which are grown in pots, or in the open ground in flower-beds against the house, protected from frost and winter wind.
We cultivate jasmine in a very sunny, well-ventilated place, but away from the wind, especially during cold injuries.
They need a good rich and deep soil, prepared by mixing good universal soil with garden soil, enriched with a slow-release granular fertilizer and lightened with little sand, lapillus or pumice stone, so that the mixture maintains good drainage.
These plants tolerate drought well, even if prolonged, but often plants subjected to severe drought tend to produce few flowers; to obtain a well vigorous and floriferous jasmine it is advisable to water the plant regularly; from April to September, always waiting for the soil to dry well between one watering and another.
Plants are generally not pruned except to contain their growth.
Jasmines are quite resistant and are not easily attacked by pests or diseases.
At the foot of the main stems, the plant tends to produce new shoots frequently, which can be picked and repotted individually.
Jasmine in winter
If we live in an area with a mild climate, ours jasminum he can stay in the garden all year long; without fear that the rigors of winter ruin it. If, on the other hand, in our area the winters are decidedly stiff it is good to shelter the plant in a cold greenhouse or cover it with woven fabric, so that the frost does not reach it.
However, remember that it is an evergreen plant, which may need watering even in the middle of winter; if the climate tends to be favorable; we therefore avoid abandoning our jasmine in a cold greenhouse and forgetting it until spring, or we will find it completely bare: rather we constantly watch, and if necessary slightly moisten the earthen bread around the roots.
Jasmine - Jasminum officinale: The so-called jasmine
In many areas of Europe and Italy, the term jasmine refers to a climbing plant that produces very similar flowers, also with a very intense aroma: this is Trachelospermum jasminoides.
As we said, this creeper has many characteristics in common with jasmine; but it is a completely rustic plant, which can withstand temperatures well below zero without being damaged. Although the plant has a general appearance and a less delicate and elegant appearance compared to jasmine, it is recommended in areas with very cold winters, so that it can easily be grown in the garden throughout the year.