A new and distinct cultivar of Blueberry plant named ‘BB06-507MI-52’ as described and shown herein. ‘BB06-507MI-52’ is a new and distinct high chill tetraploid Northern highbush blueberry (Vaccinium) variety of complex ancestry, based largely on V. corymbosum with small contributions of V. darrowii, v. angustifolium, V. tenellum and V. ashei. It is a very productive very early season variety that ripens five days before Duke, a widely planted early season highbush variety. It is characterized as having very large fruit with a very small and dry picking scar, medium blue color and very firm fruit with excellent eating and storage quality for the fresh market. The ‘BB06-507MI-52’ variety has very good flavor with a balanced amount of sugar and acidity and it is also very firm and juicy. Storage ability in refrigeration is excellent up to 6 weeks and longer with very little decline in quality.
