Although the pace of new herbicide registrations in both field and vegetable crops has slowed in recent years, existing labels continue to evolve in response to events or problems encountered in the field. Most herbicides are broken down by microbial decomposition and/or chemical reactions in the soil. Whether a particular herbicide persists in the soil from one season to the next is affected by many variables including the herbicides chemistry, field moisture, soil type, and soil pH. Labeled crop rotation restrictions (length of time required after application prior to planting certain crops) try to account for the effects of these variables, but local experiences, weather extremes and other unforeseen circumstances provide information needed to adjust these labeled intervals to help protect growers from herbicide carryover problems. Table 1 contains the rotational restrictions to selected vegetable crops for many of the more recent herbicide registrations. Vegetable crops may be particularly sensitive to some herbicide residues, so it is of utmost importance for growers to always read the label for changes to rotation restrictions prior to using any product.