Hydrangeas are relatively insensitive and are rarely visited by vermin. Once pests have settled on the plant, they can usually be fought very well.
The hydrangea is relatively rarely attacked by pests
aphids
These insects are among the weak parasites. There are about 800 different species, varying in size and color. Some of these pests protect themselves with a layer of wax powder that makes the lice appear powdered.
prevention and control
Boost the health of the hydrangea with regular sprays of horsetail or nettle broth. Mulching also prevents infestation.
Aphids can be washed off the plant with a hard jet of water. In the case of severe infestation, we recommend spraying with ecologically well-tolerated agents from the garden trade.
Mealybug
This vermin protects itself from drying out with a wax produced in special glands. First, the insects nest in the leaf axils, later they infest the entire plant. They suck on the leaves and excrete substances harmful to the hydrangea. This causes the leaves to curl up and eventually die.
prevention and control
Mealybugs often infest hydrangeas that overwinter indoors. These plants are usually too warm and it is sufficient to place the hydrangea in a cool place after a single spray.
If you can only spot a few lice, it is sufficient to moisten them with a cotton swab soaked in cooking oil or alcohol. Since mealybugs are very stubborn, it is advisable to cut off the infested parts of the plant and dispose of them in the household waste if the infestation is severe. Spray the hydrangea with a commercially available insecticide and check the plant frequently for new infestations.
spider mites
You can recognize these arachnids by the small, light green spots on the leaves and the webs on the underside of the leaves or the leaf axils. The tiny little bugs feed on the plant sap and can massively damage the hydrangea if they occur in large numbers.
prevention and control
Fertilize the hydrangea regularly so that it develops vigorously and healthily. Strong plants with an intact immune system can often deal with the spider mites on their own. Plant strengtheners such as garlic extracts or field horsetail broth have a preventive effect.
In the case of a very heavy infestation, spray the hydrangea with preparations containing neem oil. These protect beneficial insects and are also very effective against spider mites.
snails
Large holes in the center of the leaf and skeletal foliage indicate snail infestation. The evening and nocturnal animals hide in daylight. However, the traces of slime on the plant are unmistakable.
prevention and control
A finely crumbly, loose soil is avoided by snails. Snail fences, scattered pebbles, coffee powder or wood shavings are difficult for the animals to overcome.
Consistent collection is the most promising. Slug pellets (€7.49) should not be used in the home garden, as it also kills the beneficial slugs.
tips and tricks
Vermin can be fought relatively easily in the early stages with ecologically compatible agents. Therefore, check the hydrangea regularly for infestation.