Gray knots on the Japanese maple

Why do Japanese maples have gray branches?

When Japanese maple branches turn gray for no apparent reason, it may be due to a common disease affecting the plant: Verticillium wilt. copies in bucket can be affected as well as those planted in the garden and also bonsai.
This disease is caused by fungi. Not only can it be transmitted from one plant to another, but it is also very dangerous.

Can a maple tree affected by Verticillium wilt be saved?

Yes, with a little luck and quick action, the plants are to rescue.
Is the fungal infection on the root not far advanced and are only a few branches dead, the following procedure can help:

• Cut back dead branches completely with pruning shears
• Dig up the maple and thoroughly remove excess soil
• Cut back the roots generously
• be sure to use fresh substrate when planting again

Cut branches and roots must never be placed in the compost, otherwise the fungus could spread there again.

Can it be that gray branches mean the death of the maple?

Yes, unfortunately it is possible that a Japanese maple with gray knots inevitably dies. Whenever the trees are too severely affected by the fungal disease, there is a risk that they can no longer be saved. This often happens when the gray hue on the wood is not recognized until the infection has progressed too far.

What can be done to avoid the gray knots?

To prevent gray branches from forming again due to Verticillium wilt, the Japanese maple needs good and professional pruning Care. This includes:

• choosing the right one location without too much direct sunlight
• regular watering when the top layer of soil is dry
• avoidance of waterlogging
• protected hibernate without frost
• regular Fertilize from April to August