The hollyhock is actually quite hardy, but the rust fungus is a constant threat to its beauty. It triggers the dreaded mallow rust and should definitely be combated. Since he is very stubborn, you will need some patience for this.

Hollyhocks are most commonly attacked by mallow rust

What diseases does hollyhock suffer from?

Mallow rust occurs most frequently in hollyhocks. It is caused by the fungus Puccinia malvearum. But another disease can also occur, wilt. It is also caused by fungi and affects different parts of the plant depending on the pathogen.

The fungi destroy the water vessels of the hollyhock and usually cause the plant to die. In the event of an infestation, dig up the affected hollyhock and destroy it. There is no treatment for this plant disease. To prevent contamination of newly planted hollyhocks, also remove the soil around the affected plant.

Treatment of mallow rust

In contrast to wilt, mallow rust can be combated. If only individual leaves are affected, cut them off and dispose of them with household waste. Never put plant parts affected by fungi in the compost, as the spores could survive there and infect other plants when the compost is spread.

If the infestation is severe, a fungicide can help. If you would rather do without chemicals, the only way to help is to destroy the diseased hollyhock and prevent infestation when planting again.

This is how you can prevent it

The sooner you prevent, the less you actually have to do. Plant your hollyhocks in a location that is as sunny as possible with nutrient-rich and, above all, well-drained soil. Be sure to keep a sufficient distance between the individual plants, about 40 cm is recommended.

Water your hollyhocks regularly and give them the fertilizer they need, the leaner the soil, the more often. Spray your hollyhocks with horsetail broth or compost to support their resilience.

Preventive measures against diseases:

  • sunny location
  • nutrient-rich soil
  • don't plant too densely
  • water regularly
  • fertilize sufficiently
  • Horsetail broth or compost stock

tips

In a sunny spot and well supplied with nutrients, your hollyhock should be resistant to disease and pests.

Category:

Vegetable garden