This collection offers three northern highbush blueberries: Patriot, Spartan and Jersey. These are high-chill requirement varieties widely planted throughout the northern US and southern Canada. We have selected three that will produce continuously over a 90-day period. Northern highbush varieties need 800 chilling hours for good fruit set. "Chill requirement" refers to the accumulated hours of temperatures a plant experiences between freezing and 45 F that is required to break dormancy.