How to Fertilize a Potato Vine

The potato vine (Solanum laxum) is evergreen and grows to 30 feet in length. Although it is classified as hardy to zones 8a through 10b on the U.S. Department of Agriculture plant hardiness zone map, it is considered cold hardy to 10 degrees Fahrenheit. Potato vine blooms in white or light blue flowers year-round in the warmer regions of its hardiness zones. Once established the potato vine is hard to kill, thriving in wet to dry soil and sun or shade. Although it doesn't require a lot of fertilizer, an application in late winter or spring helps boost the blooming period.

Things You'll Need

• Rake
• Trash bag
• 16-20-0 fertilizer
• Mulch (optional)

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Instructions

1. • 1

     Rake back any mulch and debris on the soil beneath the potato vine. Bag everything and remove it from the garden.

   • 2

     Sprinkle 16-20-0 fertilizer on the soil, 6 inches from the base of the vine, in a circle around it. Use the amount specified on the label for the size of the potato vine. Run a rake over the soil to mix the fertilizer into the top inch of soil.

   • 3

     Water the potato vine to a depth of 10 inches. This helps soak the fertilizer to the plant's root zone.

   • 4

     Apply a fresh layer of mulch, if desired, keeping it at least 3 inches from the base of the potato vine.