These are the vegetables you can regrow from scraps at home

If you're trying to keep your supermarket trips to a minimum, you can keep your stocks up by regrowing vegetables from unused scraps.

Even without a garden, you can start your own indoor vegetable patch to keep you busy - and fed - under lockdown. While many plants will require some patience and potting with soil, some can be grown easily and quickly in a simple glass of water.

Spring onions

Spring onions are one of the easiest kinds of veg to regrow. All you need to do is take the leftover roots and put them in a glass of water (enough to cover the root) with the roots pointing down.

Within about a week, you should have a brand new set of green onions. Make sure to change the water every few days.

Celery

To regrow celery, take the base of a stalk (about two inches), rinse it off and put it in a shallow cup of warm water. You can also use toothpicks to suspend the base in water. Place it on a window sill and change the water daily.

You should see signs of regrowth after around five days. After you start seeing shoots and leaves, you should plant the celery in potting soil - choose a mix without pesticides for best results.

Make a hole wide and deep enough in the soil to hold the plant from the root end up to the cut end. Make sure there's no air pocket below the root, and gently fill in the surrounding soil, leaving the emerging stalks and leaves above the soil.

You should keep the soil moist, but not wet - celery thrives in cool weather and rich soil.

Potatoes and sweet potatoes

Ordinary potatoes and sweet potatoes can both be regrown from scraps. For ordinary potatoes, you'll need peelings that have sprouts (or 'eyes') on them.

Cut the peelings into pieces of around two inches, making sure that there at least two or three eyes on each piece. Dry the peelings overnight, then plant them about four inches deep in soil, with the eyes facing upwards. It will take a few weeks to see results, so you'll need some patience.

For sweet potatoes, cut the potato in half and suspend in a shallow container of water using toothpicks. Roots will begin to appear beneath the potato, and sprouts on the potato.

Once the sprouts reach around four inches in length, twist them off and place in a container of water. When these roots reach around an inch in length, you can plant them in soil and watch them grow in the same way as ordinary potatoes.

Lettuce

Instead of throwing away your lettuce, why not grow some new leaves?

All you have to do is take the bottom of the heart and put it in a container filled with around half an inch of water. Put it near some sunlight (a window sill is ideal) and replace the water every one to two days.

Within a few days you should see a few leaves sprouting up. From that point onwards, you can just let it continue to grow, trimming off any brown leaves that appear. When there are enough leaves sprouting, tuck in.

This works best with romaine lettuce, but should work with most other red and green varieties of lettuce, too.

Ginger

Fresh ginger is great to have on hand to flavour all sorts of dishes, from curry to soup.

To keep your own supply going, pull of a piece of ginger from your existing piece. Place it, buds facing down, in some potting soil, and leave it in a spot with indirect sunlight.