Fruit are full size and happened last year as well.
31 March 2014 06:51 AM
Bitter pit is a nutritional disorder of apples cause by calcium deficiency. Climatic factors also play a part in assisting the development of this disorder.
Bitter pit is a nutritional disorder of apples caused by calcium deficiency in the fruit as it matures. It results from a complex relationship between climate, nutrition and tree vigour. Bitter pit symptoms often occur prior to harvest, or after long-term storage.
More information can be found at this link https://www.dpi.nsw.gov.au/__data/assets/pdf_file/0010/120142/bitter-pit-apple.pdf