Rosa 'KORhumalex' ALEXANDER VON HUMBOLDT® shrub rose - groundcovering (Kordes)
size/type
low or groundcovering,small shrub
usual height
0,3-0,5m
usual width
0,3-0,5m
leaves
deciduous broadleaf
colour of leaves
flowers
showy
colour of flowers
blooming time
June-October
location
full to partial sun
soil type
any (acidic to alkaline)
soil moisture requirements
evenly moist but well-drained
USDA zone (lowest)
5 (down to -29°C)
winter protection
for zone 5+6
for zone 7
categorized
Description of the plant:
ALEXANDER VON HUMBOLDT® is a low-growing rose listed among ground-covering varieties, but fortunately, it does not create those typical tangles of thorny branches just above the ground from which fallen leaves cannot be cleaned in autumn without ending up with scratched hands. It produces short shoots about 40 cm tall and makes small, vibrant red, single flowers that bloom repeatedly from June to October. The flowers are 5-6 cm in diameter and are not fragrant. If you do not deadhead, it will yield many attractive rose hips. As a ground cover, plant 5 pieces per square meter.It is part of the Nectar Garden® series, which includes varieties that provide excellent food source for bees, bumblebees, butterflies, and hoverflies. This is not only due to their abundant flowering but also because they are healthy and do not require chemical treatments, which makes them friendly to all winged life in your garden. ALEXANDER VON HUMBOLDT® is perfectly resistant to blackspot and in good conditions it does not suffer from mildew or rust either. It can also be grown in partial shade. Bred in 2009, it was introduced only in 2018 by the Kordes Rosen nursery from Germany. Hardy to about -29 °C (USDA zone 5) and suitable for outdoor planters.
Planting instructions: Prepare a hole of size 30x30 cm. Put your rose in the way that the grafting point is 3 cm deep in the soil. Water well and cover new shoots with soil or bark mulch about 15 cm high. Roses tolerate wide range of soils but thrive in deep, humus-rich, moist but well-drained soil, in full sun.
Pruning: Cut the branches in half in autumn and prune hard to 3-5 live buds in spring after danger of frosts. During the flowering season prune flowered stems regularly and follow a regular feeding programme.
Last update: 17-12-2024
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GLOSSARY
- STANDARD QUALITY - Plants of this group are 1st class quality with number of branches and overall density adequate to their size and age, considering they were container grown.
- DE LUXE QUALITY - This label guarantees a luxurious quality of manually selected plants that, compared to their height and age, are exceptionally dense and beautiful.
- EXTRA - These plants are usually mature and bigger specimens with exceptional overall appearance.
- STANDARD (as described in the plant form) means a tree with a trunk of 190-210 cm and a crown at the top, unless specified differently. The commercial size for trees is their girth measured in the height of 1m from ground.
- HOBBY - These plants are of the same quality as our standard-quality plants but younger and therefore cheaper.
- SHRUB - a woody plant with branches growing bushy from the ground level.
- HALF-STANDARD or MINI-STANDARD - a small tree with shorter trunk, its size is usually specified.
- FEATHERED - These are trees with branches growing already from the base of the trunk and up along the stem.
- GRASSES and PERENNIALS - Sizes given usually read the diameter of the pot or the clump, as specified.
