Nisqually Trout Farms, Inc. has the triploid grass carp available nearly all year. You can stock the carp in your pond most any time of the year but the ideal time to is when the weeds are first starting to grow in the early spring. A typical stocking rate is 10-15 carp per vegetated acre. Popular uses for the carp are in private ponds, golf courses, public lakes, and other waterways that prefer a non-chemical solution to their weed control.