How many chill hours do blueberries need?

Depending on the variety, blueberry plants need between 150 and 2,000 hours of exposure to temperatures from 35 [degrees] F to 45 [degrees] F are needed to meet the plants chilling requirement and for growth resumption and bud-break in the spring. Chill time does not accumulate at below freezing temperatures.Click to see full answer. Considering this, what is considered a chill hour?Chill hours are roughly the number of hours between the temperatures of 32-45 degrees fahrenheit. Winter hours above 60 degrees are subtracted from the totals. The idea is that a deciduous plant goes dormant in the cold winter to protect itself from the cold.Similarly, what climate is best for blueberries? Blueberries are typically grown in humid, northern climates that have winter chills, mild summers and low-pH or acidic soils, conditions that limit their range. But many new varieties are available for lower chill areas, very warm areas, as well as coastal areas. The blueberry now has an enormous range. Beside above, how cold hardy are blueberries? During the winter, dormant flower buds of highbush blueberries will survive temperatures as low as -20 to -30°F while the less hardy rabbiteye (V. ashei Reade) have survived -10°F but are often damaged below 0°F. As flowerbud swell progresses, cold tolerance decreases.How many chill hours does Houston get?Within the Harris County area, Pasadena and the Galveston Bay area on the south side of the county receive approximately 350–450 chill hours; downtown Houston receives approximately 450 hours; Cypress and the Bear Creek area receive approximately 600 hours.