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If she is brimming with health, there is no reason to take a closer look at her. But when yellow leaves suddenly appear, they cause worry lines on the forehead. Which diseases and pests can lavender heather be dangerous?

The robust lavender heather is rarely attacked by diseases

The Andromeda web bug - a nasty adversary

This bug, which has a rather peculiar name, is not to be taken lightly. If you let it run free, you will not enjoy your lavender heather for long. Why? Because this bug and its larvae are gradually sucking out the leaves of this plant.

This is an indication of an infestation!

Take a close look at the lavender heather! You can recognize a net bug infestation by the following symptoms:

  • yellow, later withering and falling leaves
  • often mottled leaves
  • 3 to 4 mm bugs with web-like wings
  • laid eggs on the underside of the leaf
  • Black, shiny drops of droppings on the undersides of the leaves

Which factors favor an infestation and how to combat it

An infestation by the Andromeda net bug is favored by warm and dry weather and sunny locations in summer. You can prevent this by planting this plant in partial shade. Furthermore, you can strengthen the plant with a treatment with liquid manure.

Since the eggs are laid from August, you should check the plant for an infestation beforehand and take measures to combat the bug(s). If necessary, only an insecticide can help.

The two most common diseases: root rot and wilt fungus

The lavender heather is usually hardy. But with incorrect care, the wilt fungus can occur. The leaves turn yellow and eventually die. The affected shoots should be removed immediately. In addition, root rot - mostly caused by too frequent watering - can occur.

Prevention is better than cure

There are various measures you can take to make the shadowy bell unattractive to pathogens and pests:

  • plant in a semi-shady to shady, sheltered location
  • water regularly but moderately
  • Pot culture: fertilize every 3 weeks
  • Outdoor cultivation: fertilize in spring
  • cut with a clean tool
  • strengthen with liquid manure


You should not use specimens that are diseased or infested with pests for propagation via cuttings or sinkers. The diseases are transmitted and the pests are often carried further.

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