Multiple groups of volunteers with the Master Gardener designation have been at work on the grounds of the Great Bend Brit Spaugh Zoo in recent weeks.“We love our Master Gardeners here,” said Sara Hamlin, zoo supervisor and curator. They have researched the plants that attract and nourish butterflies for the zoo’s Butterfly House and they maintain flowerpots and foliage on the grounds. Master Gardeners also work in the community orchard that was planted at the zoo, and they have started to do some work pruning some older nut trees in the field.The Master Gardener Program is an educational volunteer training program sponsored by K-State Research and Extension.