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For young seedlings, shavings are best. Use a long-grain grater to shave the soap into small shavings. Hold the grater at a 45-degree angle to a flat surface and drag the soap across it. Afterward, sprinkle the pieces evenly in a circle about 2 to 3 feet (0.61 to 0.91 m) from the soil that harbors your seedlings. Press the soap firmly but carefully down the grater and take care not to cut your hands. Cut each bar of soap into pieces about 1⁄2 to 1 inch (1.3 to 2.5 cm) around. Insert a skewer into the tip and place each one just above budding plants. Replace the skewers about once a month or anytime they are destroyed by rain. These skewers are also great for dehydrating bugs and aphids in the nearby soil. Don't use more than 1 soap skewer per plant. Use a paring knife to cut your bars of soap in half. Afterward, wrap them in cheesecloth or burlap and use a stapler to fasten them to stakes in your garden. Be sure to space each piece of soap evenly across your perimeter.  If you're using 33 bars of a soap for a 100 metre (330 ft) long perimeter, space each bar out by about 3 metres (9.8 ft).  Hang each bar of soap at least 7.8 inches (20 cm) from the central stems of the plants. Don't hang your soap bars directly on shrubs, as they will attract rodents when they drip down the stem. For a high volume of trees and plants, use a spray bottle or backpack sprayer. Apply the soap in a circle around each plant and tree from a distance of 3 feet (0.91 m). For medium-sized gardens, use a spray bottle to apply the soap. If your garden is on the larger side, pour your liquid soap into a backpack sprayer for application. Conduct reapplication every 63 days to mimic repellent spray programs. Note that liquid soap can sometimes increase damage from other animal species. Always keep an eye out for damage and switch to bars if this appears to be the case.
Shave bar soap and sprinkle it around seedlings that have yet to appear. Create soap cubes and skewer them near budding smaller plants. Cut your soap bars in half and hang them in your garden to protect larger trees and plants. Spray liquid soap around your plants and trees if you have a big garden.