Oleander is not hardy
Like so many Mediterranean plants, oleander is not frost-resistant and therefore not hardy. Slight frosts of around minus five degrees Celsius are usually tolerated, but only for a very short time - the shrub quickly gets frost damage, which is expressed in brown, dried-up leaves and shoots. Leave the oleander outside in late autumn or in mild winters, but provide it with protection against the cold at night (e.g. a garden fleece) or, if the temperatures are to drop sharply, take it to a cool, but frost-free room.
also read
- Beware of the cold: oleander does not tolerate freezing temperatures
- It is essential to water oleander in winter too
- Cut back oleanders before wintering
Hibernate oleanders properly
Basically, the oleander should stay outdoors as long as possible and only be moved to winter quarters when the temperatures drop below zero. How much frost an oleander can withstand cannot be determined by specific degrees, but depends on the individual plant. Some oleander varieties (for example 'Papa Gambetta', 'Italia' or 'Lutein Plenum') are considered to be particularly frost-resistant, others are much more sensitive to cold. Older plants are also more robust than young ones. However, a frost-free wintering is advisable for each specimen if possible.
Tips
In summer, on the other hand, it can't be warm enough for the oleander, because it only shows its bloom when there is plenty of sun and warmth. If, on the other hand, it is cold and rainy, the hoped-for bloom can simply fail. In this case, move the oleander into a winter garden - if available - and use plant lamps to ensure sufficient brightness.
