Blueberries need Chill Requirements(CR), except for the evergreen blueberry variety. The reason is that each blueberry variety needs the low-temperature integration time required for blueberry’s buds to break the dormant.
*Temperature integration time below 7.2 °C(between 32 degrees F to 45 degrees F) required to wake up from dormancy.
Northern High Bush Blueberries
Northern high bush varieties need a large amount (usually 800-1,000) of chill hours to produce blueberries. These blueberry plants are that grow in zone 3 through zone 7.
Adams / Ai22 / Angola / ArabellaBlue™ / Aron / Ashworth / Atlantic / Aurora / Baby Blues / Berkeley / Bluechip / Bluecrop / Bluegold / Bluehaven / Bluejay / Bluepoint / Blueray / Blue Ribbon / Bluerose / Bluetta / Bonifacy / Bonus / Bounty / Brigitta / Brigitty / Brooks / Burlington / Cabernet Splash / Cabot / Calypso / Canada Blue / Canada Blue x Early Blue / Cara’s Choice / Cargo / Carolineblue / Chandler / Chanticlear / Chatsworth / Clockwork / Collins / Concord / Coville / Crabbe4 / Croatan / Darrow / Deerberry / Denise / Dixi / Draper / Duke / Earliblue / Echota / Elizabeth / Elliott / Evelyn / E-170 / F2( V. corymbosum x V. uliginosum) / F-72(USDA) / Gem / Gila / Goldraba / Goldtraube 74 / Great Blue / Greta / Grover / Hannah’s Choice / Harding / Hardyblue / Harrison / Herbert / Huron / Ivanhoe / Jersey / Johnston / June / Katharine / Laniera / Last Call / Lateblue / Legacy(500~600) / Liberty / LunaBlue™ / Lynda Blue / Meader / MegasBlue / Mini Blues / Misiblue(M7) / Morrow / Muffin™ / Murphy / Nelson / New Bluelay / North Sedgewick / Novemberglow / Nui / NU59 / Olympia / Osorno / Pacific / Pacific blue / Patriot / Pemberton / PeachyBlue / Pender / Pink Champagne / Pioneer / Puru / Rancocas / Razz Blueberry / Reka / Rubel / Russell / R-86 (Improved Stanley) / Scammell / Shirley / Sierra / Sooy / Spartan / Stanley / Summer / Sunny Blue / Sunrise / Sunset blue / Sweetheart / Talisman / Taylor / Titanium® / Top Shelf / Toro / Valor® / Wareham / Washington / Weymouth / Wolcott / Zebulon / おおつぶ星 / あまつぶ星 / おにしBlue / はやばや星 / グレーティークロップ
Southern High Bush Blueberries
Southern highbush varieties are blueberry plants that grow from zones 6 through 10. They require much less chill hours some other varieties. From as little as 150 hours… as much as 800 hours.
Abundance(300) / Arcadia / Arlen / Ascorba / AtlasBlue™ / Avanti / Avonblue(400~500) / Beaufort(700~800) / BiancaBlue™ / Biloxi / Bladen(600~700) / Blue Bayou / Bluecrisp(400~500) / BlueDrop / BlueRidge / Blue Suede™ / Bobolink™ / Bountiful Blue™ / Burst / Camellia(400~500) / CapeFear(500~600) / Carteret(600~700) / Celeste / Chickadee™ / Colibri / Colossus / Cooper / Corona / Craven(600~700) / Dazzle / Dixiblue / Dolores / Duplin / Dyana / Echo / Emerald(250) / Endura™ / Eureka / Eureka Sunrise / Eureka Sunset / Farthing(200↓) / First Blush / Flicker(200↓) / Flodablue(300) / Georgia Dawn / Georgiagem(300~400) / Goldtraube 74 / Gulfcoast(200~300) / Gupton(500~600) / Hitomi / Honey Creek(Blue Moon) / Indigocrisp™ / Initio / Island Blue / Jewel(200~300) / Johnblue / Jubilee(500) / JupiterBlue™ / Keecrisp™ / Kestrel(200↓) / Lenoir(600~700) / Lucla / Magnolia(500~600) / Magnus / Marimba / Masena / Meadowlark(200~300) / MegaBlue / Millennia(300) / Miss Alice Mae™ / Miss Jackie™ / Miss Lilly™ / Misty(250) / Newhanover(500~600) / Norman / OlympusBlue™ / O’Neal(400) / OPI / OPI Ridley1111 / Optimus / Ozarkblue(800) / Pacific Blue(JP) / Palmetto(400~500) / Paloma(Sensation) / Pamlico(600~700) / Patrecia / Pearl / PearlRiver(500~600) / Pinnacle / Primadonna(200↓) / Raven™ / Rebel(400~500) / Reveille(700~800) / Rocio / Sampson(700~800) / San Joaquin / SantaFe(300~400) / Sapphire / Scintilla(200~300) / Sebring / Sevilla / Sharpblue(200↓) / Snowchaser(200↓) / Southern Belle(400~500) / Southern jebablue / Southern Splender / Southmoon(400~500) / Splash / Springhigh(200↓) / Springwide / Star(400~500) / Summer Blue / Summit(800) / Sunshineblue(150) / Suziblue(400~500) / Sweetcrisp(200~300) / Twilight / ValentinaBlue™ / Ventura / Victoria™ / Vireo / Wannabee / Wayne / Windsor(300~400)
Rabbit Eye Blueberries
The rabbiteye blueberries have chilling hour requirement from 350 to 700 hours. Rabbiteyes flower earlier but ripen later than southern varieties. The shelf life of harvested rabbiteye blueberries is outstanding and generally better than highbush blueberries.
Alapaha(400~500) / Aliceblue(300~400) / Austin / Baldwin(500~600) / Beckyblue(300~400) / BlackGiant / Bluebar / Bluebelle(400~500) / Blue Dawn™ / Bluegem(300~400) / BlueMagic / BluePearl / BlueShower / Bonita(300~400) / Brightwell(350~400) / Briteblue(500~600) / Callaway / Centra Blue / Centurion(500~600) / Chaucer(300~400) / Choice(500~600) / Clara / Climax(400~500) / Columbus(600~700) / Costal / Crewer / Delite / Desoto / Dolce Blue(500~600) / EarlyMay / Ethel / Festival / Florida Rose / Fukuberry(400) / Gardenblue / Gloria / Hagood / Homebell / Ira(700~800) / Maru(500~600) / Menditoo / Montgomery(500~600) / Myers / Nobilis / Ocean Blue(500~600) / Ocholockonee(600~700) / Ono / Onslow(500~600) / OrangeBar / OrangeBlue / OrangePearl / Overtime / Owen / Powderblue(550~650)/ Premier(500~600) / Prince / Prolific / Rahi(500~600) / Redbar / RedPearl / Robeson(500~600) / Satilla / Sapphire Blue™ / Savory / Sky Blue / Snowflake / Southland / Suwannee / Takahe / Takes The Cake™ / Tasty Blue™ / Tifblue(600~700) / Tifton31 / Titan(500~600) / T-100 / Usunoki / Velluto Blue / Vernon(500~600) / Walker / Whitu / Windy(300) / Woodard(300~400) / Yadkin(600~700)
Other Blueberries( half high bush, low bush… )
Half highbush and other lowbush blueberries, like northern highbush blueberries, usually require 800-1000 hours of low temperature demand.
Aino / Alvar / Arto / Augusta / Baby Blue / BerryBux® / BlackPearl(M4) / Blomidon / Bloodstone / Blue Ridge(Low bush) / Blue Sunset / Brunswick / Buckle® / Burgundy / Chignecto / Chippewa / Crispin / Crouching Bear / CrystalBlue / Cumberland / EverBlue / Friendship / Fundy / Glaze™ / Hope’s Landing / Hortiblue Petite / Jelly Bean® / Jonathan / Jorma / Leslie / Little Blue Wonder / Little Crisp / Little Giant / Midnight Cascade / Nativeblue / Nocturne / Northcountry / Northblue / Northland / Northsky / Ornablue / OzekiBlue(KaBluey) / Peach Sorbet® / Perpetua / Pink Breeze® / Pink Champagne / Pink Icing® / PinkLemonade / Pink Popcorn / Polaris / Polen 38 / Princess Jenny / Putte / Ruby carpet / Sapphire Cascade / Silver Dollar® / Southern Bluebelle™ / St.Cloud / SummerSunset / Superior / Tiny Top / TopHat / WellsDelight