Houston We have battled snails for several years. Boxes of snail and slug bait have been cast. The pests have ruined begonias, daylilies and pansies, and are now attacking periwinkles.
Snails can be difficult to control, and sometimes a multipronged attack is best.
First, eliminate dark, moist hiding places such as overturned pots and pieces of lumber. Snails will crawl into or under these and hide during daylight hours. Carry a plastic bag into the garden and hand-harvest the pests gathered in the containers and on the undersides of the boards, then throw the bag away. You can also hand-harvest at night. Carry a flashlight along with the plastic bag into the garden about two hours after sundown.