This is another judgment call. Do the best that you can. You might have more than one insult to your plants. If so and you are able to identify specific damage from each insult use more that one form for reporting. The event causing flower bud damage can often be determined by cutting open the bud and observing the nascent buds flower pips.
Black pips indicate damage.
Questions have arisen about what damage to report. Plants may bloom normally after being partially or completely defoliated. Some branch die back may occur but other parts of the plant may perform normally. Report a plant as damaged if cold weather results in any type of damage. Do not report unbudded plants unless they sustain structural or leaf damage.