The early November (2014) freeze could have reduced crop load. The pictures included in this post are of ‘Star’. When scouting your berry patch, if you notice buds that are not swelling, this could be an indication of freeze damage. Take a knife and cut the bud in half. If the bud looks green around the edges with necrotic or black
spots (See image). This is an indication of freeze damage.
Cold tolerance is aided by potassium (K) sometimes known as potash. Potassium is very soluble and may not be available to the roots, which makes soil and tissue sampling an important tool for minimizing tissue damage from freezing temperatures. See your county agent from information on tissue and soil sampling.