If the leaves on basil turn brown, this is a clear indication of health problems. These can be due to negligence in care, illness, or pest infestation. The following overview shows the direction in research into the causes.
failures in care
Since basil immigrated from tropical regions, the herbal plant is dependent on an adequate location and careful care. The following deficiencies can provoke brown leaves:
- a location that is too cool with temperatures below 12 degrees Celsius (53F)
- a substrate that is too wet or too nutrient-poor
- too small a planter
diseases and pests
If the causes of brown leaves are not to be found in care errors, one of the following diseases or a cunning pest is usually behind it:
- Wilt or stem rot (Fusarium oxysorum)
- leaf spot disease
- dock owl
- Common Meadow Bugs
Combating diseases and pests with chemical agents is frowned upon when it comes to food in the hobby garden. A wide range of biological control methods are now available, in harmony with nature and for the benefit of health.