The decorative golden spotted leaves of the Aucuba japonica are truly an ornament. It is all the worse when they turn black and maybe even fall off. In most cases, however, this is not a drama.
Why is my Aucuba japonica getting black leaves?
Black leaves on Aucuba japonica can be caused by leaf age, sunburn, frost damage, a location that is too dark or too much heat in winter. Pay attention to the location and adjust site conditions as necessary to keep the plant he althy.
On the one hand, it is common for evergreen plants to lose some leaves from time to time so that new ones can grow. This doesn’t just happen in the fall, but throughout the year. As long as there are no more leaves falling off than new ones growing, you don't have to worry. However, you should check for large-scale leaf discoloration.
Is my Aucuba japonica sunburned?
If your Aucuba japonica gets black leaves in the middle of a beautiful sunny summer, then it is most likely sunburned. However, this is only possible if the plant is actually in the sun. She prefers a semi-shady or shady location. Their leaves cannot burn there.
Cut off the affected leaves, they are not a pretty sight and will fall down on their own after a while anyway. You should also move your Aucuba japonica to a slightly shadier spot. However, full shade is only suitable for simply green-leaved aucubs; species with colorful foliage usually lose their leaf pattern there.
Where do black leaves come from in winter?
If an excessive number of leaves on your Aucuba japonica turn black during the winter and the plant is outside, then it will probably have frost damage. In a mild area, this will rarely happen, as Aukubs can tolerate frost down to around -5°C or even -15°C, depending on the species. However, it shouldn't last too long.
If your Aukube overwinters indoors, then a location that is too warm could be the reason for the blackened leaves. It is also conceivable that the plant received too little light.
The most important reasons for black leaves on the Aukube:
- Age of leaves
- Sunburn
- Frost Damage
- location too dark
- too much heat in winter
Tip
Black leaves are only a cause for concern in excess. Check your Aukube for frost damage in the spring and for sunburn in the summer.
