SHATTER: Another condition occurring in early grape development. The tiny grapes have a small "cap" on the end. Normally, as they start to grow, this cap pops off. However, in a cool, wet spring, such as in 1995, the grape fails to develop early and the cap toughens. When warmer weather finally hits and the grape grows, it pushes against this tough cap. Instead of the cap popping off, the grape shatters. Again, this drastically reduces yields and leads to very low berry count and bunches with only a few grapes. Shatter was a major factor in the very low yields of the 1995 harvest.