Brown leaves caused by spider mites
Spider mites are relatively common in warm and dry conditions. The arachnids are yellowish-green, orange or red-brown in color and are 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 spider mite infestation is the fine white web on the underside of the leaf.
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- Help, my hydrangea is dying! What can I do?
- Help - my hydrangea is dying, how can I save it?
- Help, my hydrangea is wilting
remedy
Treat the hydrangea several times with sprays containing rapeseed oil. With indoor plants, you should increase the humidity.
Fungi as the cause
If the entire leaf does not turn brown, but only shows numerous dry brown spots that tear as it continues to grow, 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 parts of the plant and dispose of them in household waste. Fertilize the hydrangea with a suitable fertilizer. In many cases, a chemical fungicide is necessary to prevent the fungus from spreading further.
Sunburn of the leaves
Hydrangeas grown in the greenhouse are not used to sunlight. If the plant is exposed to UV radiation too suddenly, the leaves will burn and dry out. Casting errors can also cause sunburn. If you water the hydrangea while the sun is shining on it, water droplets on the leaves act like burning glasses.
remedy
- Gradually accustom hydrangeas in pots to the changed conditions in the field.
- Always water plants in the morning or in the evening.
Leaf dryness due to lack of water
The Latin name of the plant “Hydrangea” means “water slurper” and symbolizes the enormous thirst that the plant can develop, especially on hot summer days. If you do not water enough, the hydrangea will first let the leaves and flowers hang to reduce evaporation. If the water shortage persists, the leaves dry up and turn brown.
remedy
Always fill the hydrangea with water when the top inches of the soil feel dry. On very hot days it may be necessary to water the hydrangea in the morning and in the evening.
Tips & Tricks
With proper care and choice of location, hydrangeas are less susceptible to diseases and pests. Plants that are well cared for usually recover quickly, so that the leaf damage can no longer be seen after a short time.
