How to Fertilize Ornamental Sweet Potato Vines
- 1). Fertilize at the time of planting with a 15-16-17 granular fertilizer. Read the fertilizer package to determine the appropriate dosage for the number of plants you have or the size of the container. Work the fertilizer into the soil using a spade before planting the sweet potato vines.
- 2). Water the soil well after applying the fertilizer to begin dissolving the nutrients into the soil.
- 3). Reapply the 15-16-17 granular fertilizer once every four weeks throughout the growing season, by sprinkling the granules on the surface of the soil under the sweet potato vine. Be sure to water well after each application.