Only large, pre-grown Mandevilla / Dipladenia are suitable for facade greening. FassadenGrün presents a large range of this type, with flowers in many colors. How to choose? While the initial choice is often based on the color of the flowers, the vigour of the growth is also very important. We indicate for every Mandevilla its growth type: S, M, L or XL: some of those always require climbing aids. You may find additional information on mandevilla under "General information" and "Planting / Care".
Red is the classic color for Mandevilla, most are sold in this color. Pink and white as well as all intermediate shades are also very common. The yellow eye provides some variety, as the throat and calyx of almost all Mandevilla villas are yellow! The completely yellow Mandevilla is a relatively new creation.
Mandevilla / Dipladenia are twining vines with weak to moderate growth speed. The distance between leaf pairs ("internodes") is large, the flowers rather scattered. For decades, attempts have been made to select for an increase in flower density. The treatment of the Mandevilla with chemicals (growth inhibitors) has also yielded good results. The plants "doped" in this way don't develop long shoots but take on the desired compact form. For walls, trellises, and railings, however, the long twining shoots are more interesting than the compact form! FassadenGrün has both in its assortment. The growth groups S, M, L and XL (analogy to clothing sizes) as described further down the page should help with the selection. These groups do not describe the size on delivery, but the expected increase in length and volume.
About 90 % of all sold Mandevilla are treated with growth inhibitors and have a compressed and very stocky growth, so they hardly form any tendrilous shoots. We have described such Mandevilla as "growth type S", analogous to the "small" clothing size. Most of them are planted as small "tuffs" for the greening of graves, terraces and balcony boxes. These Mandevilla hardly grows and will only form flowers: in May they measure about 20 cm, in October approx. 30 - 40 cm. They aren't capable of covering larger wall surfaces, neither in planters nor as trellis plants - that's the reason we don't sell compressed Mandevilla.
Some Mandevillas are treated with growth inhibitors but are a little larger, around 60 - 80 cm in height. They still won't grow very high until autumn, at most to about 1 - 1.2 meters in shoot length, which corresponds to a medium size for a Mandevilla. We have named this group of Mandevilla "growth type "M" (as in "medium"). Mandevillas of the "M" group usually have thin, graceful shoots and small to medium-sized, smooth and shiny leaves. The clusters of flowers are relatively densely arranged. They are sold with a variety of growing aids: "double arch", "pyramid" or "fan trellis" designs. Such specimens are interesting for façade greening, as "displays" next to house entrances, shops, practices, law offices, etc..
The Mandevilla of this group grow larger than those of the S or M groups. The Mandevilla will have shoot about twice to three times as long as when delivered by the end of autumn and will display a natural, looping growth. These plants are not repeatedly treated with growth inhibitors, they grow about 2 m shoot length until the end of August and even 2.5 m until autumn. They are therefore ideal for small wall trellises. Mandevillas from the "L" group have very thin, delicate shoots and small to medium-sized, smooth and shiny leaves. The flower clusters are relatively densely arranged, the single flowers persist for about 10 days (except for the yellow variety Citrine). Mandevilla of this group can also be cultivated as bushes by using a pyramid trellis or a similar support.
The growth group "XL" has been named in analogy to the clothing size. The exceptional Mandevilla varieties of this group are particularly vigorous and tall. That might sound dangerous, but there is no risk for the building as there might be with wisteria or knotweed! These Mandevilla plants are NOT treated with growth inhibitors and will grow up to 4 meters in height until the end of August and even 5 meters until autumn. They grow quickly above windows and doors and have remarkably large, shiny leaves, that may or may not be ribbed. The flower clusters are further apart than with the S group or the M group, the flower density is lower. Individual flowers in this group last for quite a long time, however, from 10 to 16 days. To improve the flower density, some varieties are sold as 2 plants per pot, this will be indicated in the product description.
You can buy XL Mandevillas with a bamboo pyramid as growing aid. The strong shoots are then led directly to the wall trellis or the balcony railing from the top of the pyramid. Alternatively, the pyramids can also be used to have the Mandevilla growing as a small bush, analogous to growth type "M". The shoots should manually be wound downwards around the pyramid.
Mandevilla have several shoots, but they tend to not branch a lot. The supporting trellis should be chosen in accordance with the growth type of the Mandevilla. The growth types S ("compressed") and M ("compact") don't need vertical lines, the L and XL types however benefit from vertical cables. The cales need to be at most 15 - 25 cm apart to have the vegetation be dense enough. Further apart and the mandevilla will take the form of parallel flower strands. Ropes, railings, grids of any kind as well as thin rods are all suitable as climbing aids. The shoots are wrapped around the rope counterclockwise and tied with binding material if necessary. The plant will soon grow upwards in a looping manner. The height of the trellis should be adapted to the expected growth height. For "growth type M" that means max. 2.5 m, for "growth type XL" 3 m or more. The simple and light designs are solid enough. The "Medium-Premium" or "Medium-Classic" are visually the most appealing designs for the plants. On a horizontal axis, the twining shoots might need help and have to be tied.