Dieffenbachia gets brown spots

Excessive exposure to sunlight

The Dieffenbachia grows wild in the vast rainforests of Central and South America, where it is shaded by the jungle giants. Accordingly, she prefers a bright, warm one Location. On the other hand, she doesn't like blazing sun at all. Is the Dieffenbachia on a south-facing window, where it is exposed to strong UV light for several hours, the leaves develop brown spots.

Place the Dieffenbachia in a shady place or provide shade. The leaf spots (sunburn) unfortunately no longer disappear as a result. Wait until fresh leaves have grown back and then cut out the unsightly leaves.

Leaf spot disease

This disease caused by a fungus is not only common in Dieffenbachia. The high humidity preferred by the Dieffenbachie unfortunately also promotes infestation. the Leaf spot disease can be recognized by the following leaf changes:

• Brownish, later blackish spots on the foliage.
• The leaf tissue feels paper-thin and can fall out.
• The leaf margin can also turn brown.

Since leaf spot disease spreads very quickly, quick action is required.

• Isolate Dieffenbachia to prevent other plants from becoming infected.
• Treat with a suitable fungicide.
• Immediately dispose of fallen leaves in the household waste, as these would infect the healthy parts of the plant again.

Late blight and brown rot

These fungal diseases primarily affect tomato and potato plants. However, houseplants are not immune to them either, as they can infect all cellulosic materials and even dead wood. You can recognize them by the following features:

• Enlarging, brown leaf spots.
• Greasy mushroom lawn on leaves and stems.

Cut out the infected parts of the plant immediately so that the disease cannot spread and dispose of them with the household waste.