Potato Vine

Give Solanum laxum a sturdy vertical support from the start. Its twining, woody growth can be trained along a trellis, fence, arbor, or sheltered wall; tie new growth in regularly so it covers the intended plane rather than spilling into a path or adjacent planting. A sunny wall-side border or the back of a deep bed lets the vine rise above lower plants without taking over their growing space.^[1][2]

Plant individual vines 4 feet apart, center to center. Each plant occupies about 4 feet of horizontal width at maturity, but its 25-foot height calls for a much larger vertical reservation. Keep the base out of narrow walkways and leave a clear approach for tying in stems and spring pruning. Avoid placing it where its support would shade smaller sun-loving plants.

Use a full-sun position with moderately moist, well-drained soil. A site that stays wet around the roots is a poor fit; place the vine where drainage is reliable and irrigation can be supplied evenly in dry weather. Sheltered south- or west-facing positions help make the most of its evergreen habit in mild winter areas.^[1][2]

Flowers run from late spring through fall, so reserve the support as a visible summer-to-autumn feature rather than relying on it for a brief display. In mild climates, the evergreen foliage keeps the structure occupied beyond bloom time. Its pollinator-friendly flowers and deer-resistant habit can be useful considerations when assigning a prominent boundary or vertical planting.