If the foliage of the hydrangea suddenly turns brown and dries up, this can have various causes. In addition to care errors, pests and plant diseases can also be responsible for this.

Brown leaves from spider mites

Spider mites are relatively common in warm and dry conditions. The arachnids are yellowish-green, orange, or reddish-brown in color and difficult to spot because of their small size of only about half a millimeter. The animals are usually only noticed when the leaves turn brown and finally dry up. The unmistakable sign of a spider mite infestation is the fine white web on the underside of the leaf.

remedy

Treat hydrangea several times with a spray containing rapeseed oil. For indoor plants, you should increase the humidity.

fungi as a cause

If the entire leaf does not turn brown, but only shows numerous dry brown spots that open up with further growth, the hydrangea is infested with leaf spot fungi. A poor supply of nutrients and excessive humidity are usually responsible for the occurrence of the disease.

remedy

Remove all diseased plant parts and dispose of with household waste. Fertilize the hydrangea with a suitable fertilizer. In many cases, a chemical fungicide is necessary to stop the fungus from spreading further.

sunburn of the leaves

Hydrangeas grown in greenhouses are not used to sunlight. If the plant is suddenly exposed to UV radiation, the foliage will burn and dry up. Watering errors can also cause sunburn. If you water the hydrangea while it is in the sun, water droplets on the leaves act like magnifying glasses.

remedy

  • Slowly get hydrangeas in pots used to the changed outdoor conditions.
  • Always water plants in the morning or evening.

Dry leaves from lack of water

The Latin plant name "Hydrangea" means "water slurper" and symbolizes the enormous thirst that the plant can develop, especially on hot summer days. If you do not water sufficiently, the hydrangea will initially drop its leaves and flowers to reduce evaporation. If there is a persistent lack of water, the foliage dries up and turns brown.

remedy

Water the hydrangea fully whenever the top inches of soil feel dry. On very hot days it may be necessary to water the hydrangea in the morning and evening.

tips and tricks

With proper care and choice of location, hydrangeas are less susceptible to diseases and pests. Well cared for plants usually recover quickly, so that the leaf damage can no longer be seen after a short time.

Category:

Vegetable garden