Why do bay tree leaves go brown and fall off?

Bay tree leaves can turn brown and fall off due to a variety of factors, including environmental stress, such as drought or overwatering, which affects their health. Nutrient deficiencies, particularly a lack of nitrogen or magnesium, can also lead to leaf discoloration. Additionally, pest infestations or diseases may cause leaves to brown and drop. Proper care and monitoring of soil moisture and nutrients can help prevent these issues.