Potato vine
Solanum laxum · Solanaceae
📷 RoyFocker · Public domain
⚠️ Solanum (genre toxique) : baies et parties vertes contiennent alcaloïdes ; chiens, chats et enfants risquent irritation digestive à troubles sérieux par ingestion.
The gardener's calendar
Potato vine is in full bloom: enjoy it, watch watering in hot weather and let spent flowers feed pollinators before pruning.
ID card
- Scientific name
- Solanum laxum
- Family
- Solanaceae
- Plant type
- Semi-evergreen climbing plant
- Adult size
- Up to 3 m in height
- Foliage
- Semi-persistent to persistent depending on climate
- Flowering
- June to September, white or slightly tinted flowers
- Exposure
- Full sun
- Hardiness
- Frost-tender, fragile below 0 °C
✓ Taxonomy verifiedSource: AI estimate · hardiness: reliability medium.
Expert tips
The key tip
Solanum climbing vines grow quickly and need solid support or well-anchored trellis from the start. Water regularly during the growing season, but they tolerate well-drained soil nicely.
The common mistake
Gardeners let it sprawl on the ground or weak supports, then it becomes uncontrollable and strangles itself.
The pro's trick
Train it vertically from day one by tying the main stems: you'll get flowering height increases in just two years.
Care
Exposure
Install the potato vine in full sun for generous and sustained flowering. It tolerates partial shade but will flower less abundantly. Protect it from strong winds that can damage its supple stems.
Watering
Water regularly during growth and flowering, keeping the substrate moist but not waterlogged. Reduce watering in winter, especially in cold climates. In containers, check soil moisture by inserting your finger 2 cm deep.
Soil and planting
Use rich, well-draining substrate that is slightly acidic. In garden beds, improve the soil with compost or peat. This plant hates waterlogged roots; ensure water drains properly.
Pruning and structure
Prune lightly after flowering to maintain shape and encourage branching. Remove dead or damaged stems in spring. Guide it onto a support (stake, trellis) from a young age to properly structure the plant.
Nutrition
Apply balanced fertilizer every 15 days during the growing period (April to September). In winter, suspend all feeding if the plant slows its growth, or significantly reduce doses.
Health and pests
Watch for red spider mites and whiteflies, particularly indoors or under shelter. Good general tolerance, but fears stagnant excess moisture. If attacked, improve air circulation and opt for natural treatments if necessary.
Did you know?
The potato vine owes its common name to its tiny star-shaped flowers that evoke jasmine, even though it is a Solanaceae (cousin of the tomato and potato). Originally from South America, it was long confused with other clematis and climbing plants until its botanical classification was clarified. In Mediterranean climates, it can bloom almost continuously from summer into autumn.
Where to buy it
Best planted in autumn so the roots settle in before summer, or in early spring once the frost has passed. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, October, November.
Add this plant to my garden →Plants from the same family
- TomatoSolanum lycopersicum
- Sweet pepperCapsicum annuum
- EggplantSolanum melongena
- Cape gooseberryPhysalis peruviana
- Night jessamineCestrum nocturnum
- Pichi pichiFabiana imbricata
Tips generated and checked by Viridia — adapt them to your local climate.