Home generalIs the hibiscus hardy? Info about frost-resistant species

Is the hibiscus hardy? Info about frost-resistant species

Hardy are only the so-called garden hibiscus (Hibiscus syriacus) and the marsh or perennial hibiscus (Hibiscus moscheutos) . Hibiscus rosa-sinensis, offered as a rose marshmallow, is a pure houseplant that can be put outdoors in summer, but does not tolerate temperatures below plus 10 ° C.

The garden marshmallow is frost-tolerant to -20 ° C, but only as a perennial plant. Young hibiscus are much more sensitive. They should be protected the first winter. To do so, spread a strong foliage or bark humus layer over the roots. For safety, brushwood can be distributed. Over the years, the trees are harder to take. Then you do not need to be protected, unless you live in a rougher area, because you can keep the measures. A refined Hochstamm should also be protected. The finishing point is high, just like a rose stem, directly under the crown and is thus completely exposed to the weather. This place should be protected with fleece, jute or something similar. Also fir-spruce can be mounted around.

  • frost-tolerant to -20 ° C
  • young plants much more sensitive
  • need protection
  • protect older specimens in cold situations
  • According to experts, the blue varieties, such as 'Blue Bird', are the most frost-resistant.
frostfest

The "Woodcutting Workgroup" has tested hibiscus varieties for the garden. In a multi-year trial at five different locations, the plants were put through their paces, in terms of flowering joy, health and ease of care. Winter hardiness was also put to the test. These varieties performed best:

  • 'Speciosus' - white, half-filled to filled flowers with red inner spot, funnel-shaped, densely branched habit, up to 250 cm high
  • 'Coelistis' - blue-violet, simple flowers with red inner spot, loosely upright, medium-density branched growth, up to 190 cm high
  • 'Helena' - white, simple to semi-filled flowers with red inner spot, compact, densely branched habit, up to 160 cm high
  • 'Red Heart' - white unfilled flowers with large, red inner spot, compact, densely branched growth, up to 170 cm high
  • 'Blue Bird' - blue-violet, simple flowers with red inner spot, broad-bushed, densely branched growth, up to 210 cm high
  • 'Totus Albus' - simple, white flowers, compact, densely branched habit, up to 160 cm high
  • 'Woodridge' - pink, simple flowers with red inner spot, tightly erect, 150 to 200 cm high
  • 'Hamabo' - light pink, simple flowers with red inner spot, loose broad bushy growth, up to 200 cm high, very rain-resistant
  • 'Pink Giant' - carmine pink flowers with red inner spot (this one with silver-gray edge), tightly upright growth, 150 to 200 cm high

The Marshfish is usually described as a little hardy. In fact, it is also perennial plants that survive outdoors, just not in the planter.

The earth must not freeze. I can only report on my own experiences. For 4 years I have planted a "Kopper King", but protected, close to the house, south side. I've covered the root area with fir twigs and otherwise kept waiting for the things that come up and every year I thought he did not make it. The plants are extremely late, you have to get used to it. Every year, the hibiscus has become bigger and more beautiful and has not taken any damage. The last winters were not really cold in Niedersachsen either. Otherwise, I have read in my research that the swamp hibiscus is cultivated in a bucket and overwintered frost-free. Light is not necessary as it moves in. Temperatures around 0 ° C are ok, it should only be frost-free. Do not allow to dry completely.

In Hibiscus moscheutos, all varieties are about the same hardy. Here there should hardly be any differences in frost tolerance. It is given very differently, from -10 to -20 ° C. Short-term frosts should not be a problem, but if the soil freezes over long periods of frost, it can happen that the roots are damaged. Here, only a good protection helps, so cover the root ball well and warm. Twigs helps well, as it also protects against too much moisture. Wetness in combination with frost is not a good constellation.

  • Hardy to -10 ° C, then it can be difficult
  • Good winter protection helps
  • Short-term frosts no problem
  • Worse are long-lasting low temperatures
  • Bad combination - wet and freezing
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