The Content Of The Article:
In the winter months, a lush flowering potted plant is often offered in our flower shops. The Zimmerazalee (Rhododendron simsii) belongs to the genus Rhododendrongewächse and is widely used as a room culture. It is also known under the German names Azalea and Alpenrose.
This species is native to China and Japan. In total, there are up to 850 species that are represented in Europe, Asia and Australia.
The Zimmerazalee is a small flowering shrub that grows up to 45 cm high. It has 2 - 3 cm long oval-round, leathery leaves. In indoor culture, the plant is usually kept only as winter and spring bloomers.
When buying note
When buying, look for beautiful foliage, uniform growth and strong bud growth with the first unfolding flowers. The assortment in the specialized trade is very large. There are varieties with small and large flowers that can be simple or filled. The colors vary from white to dark red. It is available in miniature, as a larger, biennial plant or as a high-stemmed specimen. Larger, expensive plants should only be purchased by lovers with green thumbs who have already brought azaleas over the winter.
The plants come in a roundabout way through the flower trade directly from the gardener from the cold greenhouse and are then often placed on the windowsill in the heated living room. If there are still direct suns, it is about the bloom soon happened. The foliage and buds are dropped.
It is better to put the plants for 2 - 3 days in a cool room after the purchase and slowly get used to a warmer location.
In summer, the Zimmerazalee enjoys a partially shaded place on the balcony or in the garden.
The Zimmerazalee always needs moist roots. It does not tolerate calcareous water. Rainwater is well suited. In the heated room the need is very high. A morning overspray with warm water is recommended. It is also good if the pot is on a larger saucer filled with pebbles and water. However, waterlogging and drafts are the purest flower killers.
After the flowering period until the month of August, the Zimmerazalee is fertilized moderately with rhododendron fertilizer every 4 weeks. Until flowering is then even more sparingly, every 6 weeks, supplied with nutrients.
The propagation of the plant takes place in early spring as Kopfsteckling of young tribe. Insert 8 - 10 cm long cuttings into a small pot and pour on. The moist substrate should consist of half of sand and peat. A transparent plastic bag is pulled over the pot for a good microclimate and then placed in a partially shaded place. The rooting lasts about 8 - 12 weeks. Thereafter, the young plant is converted into rhododendron substrate.
Pests and care errors
If the bale is too dry or the location too warm, the room azalea loses its leaves and buds.
Wilted flowers are constantly removed with the stem and unsightly leaves are removed.
Waterlogging leads to rot on the plant. The Zimmerazalee is often attacked by aphids, spider mites and white flies. The thunderstorm prefers the young green and fresh flowers as a host for their larvae. With the commercial sprays can be made the unpleasant guests of the end. The Black-weevil also finds the plant very tasty. The typical food marks are on the leaves. In this case, the soil and the plant are searched for the pests.
Some tips about the plant
- To preserve the compact growth pattern, all longer shoots should be cut back after flowering. Zimmerazaleen are difficult to keep in the room culture and more than a year.
- In a cooler place and moist pollen may possibly succeed over a longer period.
- The plant can be placed in the shady field, if there is no risk of frost. On warm summer evenings, it may be sprayed with lime-free rainwater. In autumn she will be taken back to the house.
- Budding is encouraged if it is kept slightly drier in late summer. Another requirement is cooler night temperatures. In order for the buds to evolve, the plant is again cooled at 8 - 13° C. This is ideal for the Zimmerazalee.
- At the beginning of the flowering period, it should not be warmer than 21° C.
- If the room azalea was brought over the summer, it should be repotted every 2 - 3 years after flowering.
Rhododendron obtusum produces about 2.5 cm wide, funnel-shaped flowers that appear alone or in pairs or triplets in pink, white, magenta and red tones. It forms bushy, up to 45 cm tall hybrids with 2.5 - 4 cm long leaves.
Rhododendron - Simsii hybrids are similar to Rhododendron obtusum but have larger and more numerous flowers. They stand alone, in pairs or in threes, are each up to 5 cm wide, simple or filled and sometimes also curly. The color palette includes red, pink, white and orange in many nuances.
The Zimmerazalee is one of the most sophisticated houseplants. This is often forgotten. In the winter months, however, it is one of the most popular houseplants, as it unfolds its flowers in this dark time and provides color in the rooms. They bloom from December to March.
- Height up to 45 cm
- Width up to 45 cm
- Temperature 7 - 16° C
- Brightness without direct sun