On the one hand, it is common for evergreen plants to lose some leaves from time to time so that new ones can grow there. This then happens not only in autumn, but spread over the year. So as long as more leaves don't fall off than new ones grow back, you don't have to worry. However, you should check for extensive leaf discoloration.
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Does my Aucuba japonica get sunburn?
If your Aucuba japonica gets black leaves in the middle of a beautiful sunny summer, it is very likely that you are sunburned. However, this is only possible if the plant is actually in the sun. It prefers a partially shaded or shady location. Their leaves cannot burn there.
Cut off the affected leaves, they are not a pretty sight and will fall off on their own after a while. You should also move your Aucuba japonica to a slightly more shady place. However, full shade is only suitable for simple green-leaved aukubes; species with variegated foliage usually lose their leaf markings there.
Where do black leaves come from in winter?
If too many leaves of your Aucuba japonica turn black during winter and the plant is outside, then it is likely to have been damaged by frost. This will rarely happen in a mild area, because Aukuben can tolerate frost down to around -5 ° C or even - 15 ° C, depending on the type. However, it shouldn't last too long.
If your Aukube winters indoors, too warm a location could be the reason for the black discolored leaves. It is also conceivable that the plant received too little light.
The main reasons for black leaves on the aukube:
- Age of the leaves
- sunburn
- Frost damage
- too dark location
- too much heat in winter
Tips
Black leaves are only a cause for concern when in excess. Check your Aukube for frost damage in spring and sunburn in summer.