Hello, the Hedge Cutting Staffordshire team here. If you’re like me, living in the heart of Staffordshire, you know that growing your own vegetables can be incredibly rewarding. One of my favourites to grow, despite our sometimes unpredictable Midlands weather, is the sweet potato. But knowing when and how to harvest them can make all the difference between a good crop and a great one.
Quick Answer
The best time to harvest sweet potatoes in the UK is typically late September to early October, when the leaves start to yellow, and before the first frost hits.
Understanding the Growing Season
Sweet potatoes thrive in warm weather, which might seem a bit challenging in the UK. However, by starting them indoors in late April and planting them out in May, you can maximise their growing season. They need around 90 to 120 days of frost-free growth, which is achievable if you plan carefully.
When to Harvest Sweet Potatoes
Timing is crucial when it comes to harvesting sweet potatoes. Here in the Midlands, you'll want to keep an eye on the weather come late September. The leaves will start to yellow, indicating that the tubers are maturing. Ideally, you should aim to harvest before the first frost, which can damage the tubers and reduce their storage life.
| Month | Task | Notes |
|---|---|---|
| April | Start indoors | Use a propagator for warmth |
| May | Transplant outside | Ensure no frost risk |
| September | Monitor leaf colour | Harvest once leaves yellow |
How to Harvest Sweet Potatoes
To harvest, use a garden fork and gently lift the soil around the plant. Be cautious not to damage the tubers, as cuts and bruises can lead to rot during storage. Once lifted, let them dry on the soil surface for a few hours in the sunshine if possible.
Tips for Harvesting
- Choose a dry day to harvest, as wet conditions can lead to muddy tubers and harder storage.
- Handle the tubers carefully to avoid damage.
- Consider curing the sweet potatoes in a warm, humid environment for a week to enhance sweetness.
Storage Techniques
Once harvested, sweet potatoes should be stored in a cool, dark place. A garage or a cellar works well. They should be kept at a temperature of about 12-15°C. Properly stored, they can last through the winter, providing a steady supply of delicious home-grown produce.
Frequently Asked Questions
Can I grow sweet potatoes in containers?
Yes, sweet potatoes can be grown in large containers, which is ideal for those with limited space. Ensure the container is deep enough to accommodate the tubers.
What if I harvest my sweet potatoes too early?
Early harvesting may result in smaller tubers with less developed flavour. However, they are still edible and can be used in various dishes.
How do I know if frost has damaged my sweet potatoes?
If the leaves are blackened or the tubers have soft spots, frost damage may have occurred. It's best to harvest before any frost risk.