Poland is a country of E.U in which harvest of blueberry is beginning latest. West and south of the country has similar start of the season like in Germany, but Centre and east later.
Normally harvest in Poland begins when the season ends in Spain. First blueberries from polish tube plantations can be bought in June but quantity is small. July is a month where harvest from plantations covered by foil tunels (26-27 week). First is Duke, after 2 weeks Bluecrop begins. Full season is from 32-33 week, after that quantity of blueberries decreases but it is still exported.
Between August and September a good alternative is Chandler. Size of Chandler in September is smaller than in August but they are durable. Last year is an increase in planting of variants like Liberty, Aurora which have good quality in the second part of a season. Aurora can have good parameters in October but the problem is in not the best flavour of Aurora.
Aurora because of cold temperature autumn should be covered by foil and then the flavor is better.