Growing Sweet Potatoes in The Northern Territory
Introducing Sweet potatoes
Top End is Sweet Potato Country! Sweet potatoes are the tuberous roots of a beautiful perennial vine. A close relative of morning glory, these nutritious veggies originate in the tropics. They love the warm Top End climate and produce an abundant harvest.
Don’t overfeed your plants with nitrogen. Just like with other root crops, too much nitrogen will result in beautiful vines and leaves, but under-developed tubers.
You’ll get a better harvest from the plants in full sun, but sweet potatoes can grow in more shaded areas too.
Dig plenty of compost and well-rotted manure. Sweet potatoes do well with a good nitrogen boost in the beginning. It’s important that your soil is loose and well-draining. If you have heavy clay soil, rather plant your sweet potatoes into containers or raised beds.
You can grow your own slips. Allow a sweet potato to sprout. Take cuttings of the shoots and place them into soil to root. Take care to keep the soil moist while they root. Alternatively, buy sweet potato slips or plants and plant them into your garden.
Sweet potatoes handle hot, dry weather well. Water them when the soil is dry but be careful not to over-watering as this may cause the tubers to rot.
Don’t over-feed your sweet potatoes with nitrogen. Give them a balanced, organic feed every 8 weeks throughout the growing season. Compost tea or a balanced organic fertilizer are good options.
A good thick layer of organic mulch will help with water retention. Lucerne, sugar cane or pea-straw are all good options.
Pull the vines out of the way so that you can see the soil and then dig your tubers up using a garden fork. Take care not to damage your tubers while harvesting. Sweet potatoes need to be cured to make them sweet and tasty. Leave them to stand in a warm, humid, well-ventilated spot for a few days before eating them or storing them away.
Sweet Potato Weevils
Buy slips that are certified weevil-free and practice good crop rotation. Mulch also helps to keep the soil from cracking which makes it harder for adult weevils to access the roots.
Spray with soap spray weekly until the problem is under control. It may be necessary to reapply more often, particularly during wet weather
What to do about Sweet Potato Weevils?
What to do about Aphids?