Why Are My Raspberries So Sour?
Raspberries can be sour for various reasons such as the variety of the plant, under-ripeness, the soil pH level, insufficient moisture, over-exposure to sunlight, and lack of nutrients. Generally, sourness in raspberries indicates either under-ripeness or insufficient water. So, make sure to harvest them when they are fully ripe, water them regularly, and provide adequate nutrients to the soil to minimize sourness in raspberries.