Powder Blue (or Powderblue, depending on who you're talking to!) is a later-ripening blueberry that is plump and flavorful! Grows to 10ft, but can be pruned smaller. Fast growing bush! Our plants are 2 years old, and they should fruit this upcoming spring. Rabbiteye. Produces more when planted with another rabbiteye type. Zones 7-9. 550-650 chill hours.