To plant sweet potatoes successfully, follow these steps: 1. Prepare Sweet Potato Slips (Cuttings):
- Sweet potatoes are typically grown from slips, which are shoots grown from a mature sweet potato tuber.
- To produce slips, place sweet potato tubers in moist sand in a warm environment (such as a propagator or airing cupboard) until leafy shoots about 5–7.5 cm (2–3 inches) long appear.
- Cut these shoots off at the base and root them in small pots filled with peat-free multi-purpose compost, keeping them warm and moist until they develop roots
2. Soil Preparation:
- Sweet potatoes prefer loose, well-drained, sandy or loamy soil with good aeration to allow tubers to grow smoothly.
- Prepare the soil by forking in plenty of organic matter such as homemade compost or well-rotted manure (about two bucketfuls per square meter).
- If planting outdoors, warm the soil before planting by covering it with black plastic or fleece for a few weeks
3. Planting:
- Plant slips or young rooted cuttings after all danger of frost has passed and when soil temperatures are consistently above 65°F (18°C).
- Space plants about 30 cm (1 ft) apart in rows that are 36–40 inches (about 90–100 cm) apart to allow room for vines to spread
- Plant slips at the same depth they were growing in pots, firm the soil gently around them, and water generously
- For outdoor planting, choose a warm, sunny, sheltered spot. For cooler climates, growing in containers or greenhouses is recommended
4. Care:
- Keep soil consistently moist, especially during the first 50–60 days to support root development.
- Control weeds early as sweet potato vines will eventually shade them out.
- Feed plants with a high-potash fertilizer or liquid tomato feed every two weeks to encourage tuber growth
- Pinch out growing tips to encourage bushier growth if desired
5. Harvesting:
- Sweet potatoes are ready to harvest when the vine tips start to yellow, typically 85–120 days after planting depending on the variety and climate
This method ensures healthy growth and a good yield of sweet potatoes whether planted outdoors in warm climates or in containers and greenhouses in cooler areas