- Oleander blooms often fail during wet and cold summers
- Black, hard buds often indicate fungal infection
Unfortunately, oleander is one of the very sensitive ornamental plants, susceptible to various diseases and pests. The plant, which originates from the Mediterranean region, is also quite sensitive to unfavorable weather conditions and other disturbances. In many cases, this sensitivity is particularly noticeable in the buds and flowers.
When the oleander doesn't open its pretty buds, it's very annoying
Oleander blooms often fail during wet and cold summers
If the oleander has developed many beautiful buds, but they take their time opening or are simply dropped, the plant is probably too cold and too wet for flowering. To flower, oleanders need plenty of sun and warmth-and the right kind of moisture, which is from below. The Mediterranean plant, on the other hand, does not like rain at all - especially in connection with a lack of or insufficient heat. In such a case, the only thing that helps is to wait for better weather or to place the oleander in a bright and warm winter garden.
Black, hard buds often indicate fungal infection
However, sometimes the weather is not the cause of the failed flowers. Black, hard buds, for example, are usually an indication of a fungal infection, to which the oleander is unfortunately very susceptible. You can only prevent such an infection by spraying a pesticide in good time, which is ideally done in the fall and before putting them into winter quarters. If the disease has already broken out, however, the only solution is to cut back into healthy wood.
Be careful when applying pesticides: test first!
The oleander is particularly sensitive to some oily pesticides. Before use, carefully read the instructions for use and the instructions for use: Many packages already state which plants the product is not suitable for. With other products, first try on a small area to see if your oleander actually tolerates this product.
tips
Before you finally clear your oleander from its winter quarters, you can first put it in a warm room. However, you should install additional plant lamps for this, because the shrub needs a lot of light, especially for the formation of buds and flowers. Finally, put the preferred oleander in the garden between the beginning and middle of May.