Question:
Why are my raspberries small, dry, crumbly, and seedy?Answer:
Dry, seedy, or crumbly raspberries usually result from poor pollination, leading to poor drupelet development. Each raspberry is made up of many small drupelets, and if some of the flowers are not adequately pollinated, portions of the fruit fail to develop properly. Poor pollination can occur during periods of rainy, windy, hot, or very dry weather, during pollination reducing pollinator activity. The result is fruit that may be misshapen, dry, crumbly, and seem unusually seedy because fewer drupelets have developed around the seeds.
Environmental stress is another common cause. Extreme heat during fruit development can produce berries that are drier, more crumbly, and less flavorful. Dry soil conditions or drought can have a similar effect on fruit. Raspberry plants have relatively shallow root systems and are sensitive to inadequate soil moisture. Consistent watering when soil conditions are dry, especially during fruit development, is important to avoid poor fruit development.
In some cases, insect feeding or diseases (both viral and fungal, like anthracnose) can also cause crumbly fruit, but weather-related stress and poor pollination are among the most common causes in home plantings.