If the leaves of the hibiscus change color in the garden or room, there can be several reasons. The various options and their remedies can be found here.© imago13 - Fotolia.com
If the leaves of the hibiscus suddenly turn yellow, there is usually something wrong with the plant. Now the garden friend is forced to move, because after all he wants to save his exotic shrub from further harm.
The causes of the discoloration of the leaves can be various with the hibiscus. On the one hand, these can simply be older and withered leaves, but there could also be a lack of nutrients.
The yellow spot mushroom or the spider mite can also turn hibiscus leaves yellow. Ultimately, a change of location or care errors are to blame for this evil. This applies to both the garden hibiscus and the indoor hibiscus.
Step by step we want to get to the bottom of possible causes and give you some tips for prevention and control.
Has care been neglected?
It is not always a disease when the leaves of the hibiscus turn yellow. It is often only a sign that care work has been neglected. What maintenance errors can be the cause?
Dryness is a big evil for the hibiscus in the garden and in the room. If you have not watered your hibiscus for a long time, the leaves lose their color, become increasingly yellow, hang down and finally fall off. You should therefore remember to water your plant regularly and sufficiently.
However, the room hibiscus must not be watered so heavily, otherwise waterlogging can form. This significantly endangers the roots. You can only give your hibiscus water again when the top soil has dried.
"By the way: Simply pour away excess water in a planter.
If rotten roots have already formed, cut them back and repot your hibiscus.
Yellow leaves often form even on old shoots. You can counteract this with an annual pruning.
The leaves of the room or bucket hibiscus also turn yellow after frequent changes of location. He also reacts stressed by dropping buds. So put it in a suitable location right away.
Disease or pest infestation
If yellow spots appear on the leaves of your hibiscus, everything indicates a virus attack. If the spots are brown, it is a fungal disease. The cause research for this has not yet been completed.
What to do if leaves have yellow spots?
Cut them off and dispose of them with household waste. Under no circumstances should you throw the leaves on the compost. In this way, the pathogens can later spread to other plants.
You are also well advised to place the diseased houseplant in isolation. To avoid infecting other plants, it is recommended that you wash your hands thoroughly after use. The scissors with which you removed the diseased leaves must now also be disinfected.
Aphids and spider mites can sometimes weaken the hibiscus. The room hibiscus is very often infected in winter, especially when the air is very dry.
The best way to remove the pests is to spray the hibiscus once a week with lukewarm water. In stubborn cases, use soapy water. The underside of the leaf is treated here.
As a preventative measure, it is advisable to ventilate the room regularly. This keeps the indoor climate optimal and greatly reduces the risk of spider mite infestation.
Regular fertilization protects against chlorosis
If the leaves turn yellow over a large area, it is usually an indication of chlorosis. This is an acute deficiency of chlorophyll, caused by insufficient nutrients in the soil, such as boron, iron, magnesium, sulfur or nitrogen. With a suitable liquid fertilizer, used regularly, you prevent a deficiency of the leaf green.
A too dark and too cool location of the houseplant also favors chlorosis.
It is best to place the rose marshmallow (Hibiskus rosa sinensis) in a bright location. A window sill is ideal for this. However, the hibiscus should not be exposed to the blazing sun of a south window.
In summer it can stand warmer. But during the break, in winter, the exotic plant feels most comfortable at temperatures of 12 to 14 ° C.