DIPLADENIA


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origin

Dipladenia (Mandevilla) are climbing shrubs of the family Dogs family (Apocynaceae). They come from the jungles of South America and have been popular with us for more than 100 years as pot and container plants. Almost the whole summer, the gorgeous white, pink, red or yellow flowers of evergreen climbing plants adorn balconies and terraces. Often the Mandeville plant (named after Henry John Mandeville) is still listed under its older botanical name "Dipladenia". More than 120 species are known from the Dipladenie. Most of the plants we cultivate are small hybrids of the wild species Mandevilla sanderi, in which other species such as Mandevilla splendens or Mandevilla boliviensis have been crossed. A special form for outdoors is Mandevilla laxa, also known as Chilean jasmine, with greater tolerance for cooler temperatures and white flowers.

Appearance and growth

The evergreen dipladies are fast-growing creepers, which wind up quickly when there is enough food. Depending on the variety, the liana-like climbers can reach up to six meters. For balconies and windowsills in the trade are often offered compressed breeds. They remain small and compact by an artificial containment of the growth impulse - however often only in the first year. At the latest after the hibernation in the second year, when the compression means has lost its effect, they shoot noticeably in the air.

Blooming Dipladenie in the pot

Dipladenia are real flowers in the pot. A trellis stick inside keeps the plant upright

The dark green shiny leaves of Dipladenie stand on short stems and are slightly hairy. The leaves contain non-sensible glands. From them occurs in violation of leaves and stems white milk juice. It tastes bitter and is slightly poisonous.

The five sepals of Mandevillen open to a funnel flower up to five centimeters in the colors white, yellow, purple and various reds. Dipladenia flower from May to fall and make new buds throughout the summer. New varieties show a stately flower abundance. The white flowers of the winter-green Mandevilla laxa also exude a pleasant scent. The pollination is done mainly by bees and bumblebees, in their tropical homeland also by hummingbirds.

Funnel-shaped Mandevilla blossom

The funnel-shaped flowers of Mandevilla attract insects

After flowering, capsule fruits appear on the plants with elongated, hairy seeds inside. For a larger amount of flowers, you should remove ripening fruits, which saves the plant unnecessary energy consumption.

Location and substrate

The different Dipladenia species are suitable for balcony or terrace as well as for the warm conservatory. Mandevilla laxa can also stand in the cold conservatory. In any case, the frost-sensitive beauties need a lot of light to bloom richly. Place the plants in a very bright, humid place, where they are best protected from the blazing midday sun, as this is something that Dipladenia is somewhat sensitive to. Heat, on the other hand, does not bother the Mandevilla.
In sufficiently warm shade, Mandevilla thrives as well, but then the flowering is slightly lower. Temperatures around 20 degrees and more are ideal for the tropical climbers. Dipladenias are best planted in high-quality potting soil, tolerating slightly acidic, alkaline or calcareous substrates.

Mandevilla 'Bloom Bells Yellow'

Mandevilla 'Bloom Bells Yellow' shines in sunshine yellow

maintenance

The water requirement of a Dipladenie is moderate. In its thick leaves and storage roots, the plant can keep water in stock for a long time. Always water the climbing plant so that the root ball is well moistened but not wet. Make sure that excess water can drain off immediately, so that it does not come to waterlogging. Use only tempered, preferably low-limestone irrigation water. Keep the root ball evenly moist throughout the growth period and spray the plants more often. After flowering, watering is reduced. So that the climbing plants thrive well, you should provide them once a week with a high-quality liquid container plant fertilizer. Since Mandevillen are creepers, they need a climbing aid in the pot. Lead the winding shoots through the climbing aid again and again before they get caught in the neighboring plants.

Repotted every two to three years in spring, when the pot ball is completely rooted, in a slightly larger pot. Larger Dipladenien tolerate it well, if the root ball is just slightly reduced and placed again with fresh soil in the same pot. When repotting, you should give some slow-release fertilizer in the substrate.

Fix Dipladenie on the trellis

Help the Dipladenie find a hold on the trellis

To cut

Smaller cutting work on the plant can be done throughout the year. However, the Mandevilla is beginning to bloom again, so you should not cut too generously later in the season. Too large or bulky plants that require a stronger pruning, cut best in late winter (February / March). At this time a pruning stimulates the new shoot and thus the flowering. Even a near-ground pruning Dipladenia do not crooked - in the spring, the plants are strong again. Young plants should be tended more often for a bushy growth. To stop the strong juice flow, you can then immerse the shoots in water or spray them with water.

wintering

The exotics, with the exception of Mandevilla laxa, are very cold-sensitive. Therefore, they are placed before the first frost in a bright, 5 to 12 degrees warm winter quarters. If they are wintering coolly, the Dipladenia take a break from October to March. Then they should be less cast, so that the root ball can dry in between. Standing in the living room or heated conservatory at over 20 degrees, they are maintained as usual and then continue to bloom in the winter. However, a lack of rest can have a negative impact on the abundance of flowers.

In contrast to all other species, Chilean jasmine (Mandevilla laxa) tolerates frost degrees to minus five degrees for a short time. Nevertheless, it should only be wintered outside in very mild conditions with good frost protection. In winter quarters, ensure that there is sufficient air humidity and ventilate on frost-free days. In May after the last late frosts the potted plants are allowed to go outside again.

Chilean jasmine

Mandevilla laxa, the Chilean jasmine, bears snow-white flowers

proliferation

The multiplication of Mandevilla at home is a matter of luck, because the rooting rate is not very high. Who wants to try anyway, can cut about ten centimeters long head cuttings from the shoot tips, except for a pair of leaves remove all leaves, dip into rooting powder and then put in a soil-sand mixture or potting soil. The pots are poured, covered with a transparent foil bag and not opened for the time being. Alternatively, a well-closing miniature greenhouse can be used. With heat (well over 20 degrees) and lots of light, for example on a window sill over a heater, the cuttings form after a few weeks first new shoots.
Now patience is required: over a few months, the plastic hood is aired daily until show up several young shoots. If the small plant has regrown vigorously, it can move without hood into a larger pot. In early summer dipladenias can also be increased by sinkers. A long, slightly woody shoot in the middle section is freed from the leaves and its bark is slightly scratched. In addition to the mother plant, the thus prepared drive section is sunk into the ground. Tip: With a hairpin, the offshoot can be anchored perfectly in the ground. The shoot tip should look out of the earth at the other end. Here, too, a successful rooting shows the strong new budding.

Types and varieties

Particularly drought-resistant varieties are the Mandevilla Sanderi hybrids 'Sundaville' and 'Tropidenia'. Some compact varieties from the 'Jade' series are ideal for the balcony box. Climbing species such as the Chilean Mandevilla (Mandevilla boliviensis) are ideal for supporting trellises or scaffolds and are well suited as privacy screens. Small-growing varieties such as 'Diamantina Jade White' are suitable for hanging teams. The pink Mandevilla x amabilis 'Alice du Pont' with up to ten-centimeter large flowering funnels is considered the largest flowering Dipladenie. It is vigorous and forms meter-long shoots, which leads along the climbing frame. The Mandevilla hybrid 'Sundaville Red' feels good in the heat, tolerates dryness and adorns the summer with velvet flowers. On climbing frames she is pulled about 150 centimeters high.

Dipladenie 'Stars and Stripes'

Dipladenie 'Stars and Stripes' with striped flowers

Diseases and pests

Dipladenias are not particularly stress-resistant. Especially with permanent heat and drought, they are prone to pests such as the white fly. As a precaution, yellow sheets can be placed around the plant, in case of heavy infestation must be intervened with pesticides. In early May, aphids often show on the leaves. Too much air can lead to curled leaves. In winter quarters the Dipladenie is often populated by wool lice. In the case of very strong pest infestation, the plant should simply be radically cut back in late winter.

Video Board: How to Prune a Dipladenia.

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