Can You Grow Onions from a Sprouted Onion

Did you know you can grow new onions from an old sprouted one? You can get up to three onions from a single sprouted bulb. It's a great way to get more onions without spending a lot. So, how is this possible? Let's find out.

When the onion starts to shoot green sprouts, it's ready to grow again. Start by peeling away the old layers. Keep the parts with green shoots and roots. This step is crucial since a sprouted onion has three parts that can each grow into a new onion.

Make sure the onion doesn’t sprout for more than three weeks before planting. Choose a sunny spot for planting. Onions need lots of sunlight. Plant them about one inch deep in soil that's loose and drains well. Onions like slightly acidic soil. Adding fertilizer helps them grow better.

Onions need just the right amount of water. Keep the soil moist but not soaked. Also, water the soil, not the sprout. Onions take about three months to get as big as a baseball.

Picking your onions is easy. Just pull them out gently, and they're ready to eat. If you want to save them, they need to be cured first. Curing means letting them dry in a warm, dry place for a few weeks. After curing, you can store them up to 10 months in a cool, dry spot.

Don't throw away those old sprouted onions. Try planting them instead. With some waiting and care, you can have your own fresh onions. It’s a fun way to turn a kitchen mistake into a garden success.

How to Regrow a Sprouted Onion

Start by peeling off the onion’s outer layers until you find the green sprouts. Be careful to keep the roots as they are. Each sprouted onion has three plants inside. This lets you grow more than one onion from it. The sprouts can be planted for up to three weeks after you see them.

Onions need lots of sunlight, 12 hours or more. Plant them about an inch deep with space between each one. Make sure the soil is always kept damp.

The sprouts will grow and look healthy in about three weeks. Keep them watered and in a sunny spot. They will then turn into full onion bulbs.

After three months, the onions will be full size. The green sprouts will dry out, and you might see flowers. This is when you can pick and eat them.

Onions are ready to harvest in 60 to 80 days. It’s crucial to store them right for the best taste. Keep them in a cool place, but not in the fridge. Use them within a month.

For healthy sprouts, water them every 2 to 3 days. Also, use a spray twice a week to keep away harmful fungus.

Quick Tips for Regrowing Sprouted Onions:

  • Peel off the outer layers until you reach the green sprouts
  • Plant the sprouts in full sun, providing at least 12 hours of direct sunlight
  • Bury the onion sprouts about one inch deep in well-drained soil
  • Space the sprouts at least four inches apart to allow room for bulb growth
  • Water the sprouts regularly and keep the soil consistently moist
  • Expect to see onion bulbs form after 60 to 80 days of planting
  • Store harvested onions in baskets or dry mesh bags in a cool, dry place
  • Treat the sprouts with fungicidal spray twice a week to protect them from harmful fungi
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Planting Onion Sprouts Indoors

Onion sprouts can turn into new onions if cared for right. You can plant them indoors and they'll grow. They are perfect for indoor growth because they don't need bees to pollinate them. But, they still need lots of sunlight to be healthy.

If you want your onion plants to do well, they need more than 12 hours of sunlight every day. A grow light can help if your home doesn't get enough light. Just make sure the light is close enough to the plants.

Watering your onion sprouts correctly is also very important. They should not be watered every day. A little water once a week is usually enough. Make sure their soil is well-drained and slightly acidic. This helps them grow better.

When you plant your sprouts inside, use big enough pots for them to grow. Plant them with just 1 inch of soil covering them. Make sure the sprouts are not too close together. They need space to grow well.

To grow onions indoors, focus on giving them the light, water, and soil they need. With the right care, you can enjoy a good harvest of fresh onions.

When to Plant Onion Sprouts

The best time to plant onion sprouts differs based on where you are. Spring is usually the top choice because it's warmer. But remember, onions dislike frost, so wait until it warms up enough. If you're in a colder place, you can start them indoors. Then move them outside when it's nicer.

Onion sprouts are okay for about three weeks before you plant them. It's key to give them good light and care. They should get a lot of sunlight. If it's not sunny enough, you can use special lights.

Choose a spot for your onion sprouts that gets a lot of sun and has soil which drains well. Onions like soil that's at least 50°F. Before you plant, make the soil nice by working in some compost.

Onions don't need to be watered every day. Once a week is fine. Be sure the soil is damp but not too wet. Overwatering can cause the onions to rot. Check the soil often to see if you need to water more or less.

With the right care, your onions will grow well. They take about three months to get to the size of a baseball. Growing onions at home can bring you a lot of tasty onions if you're patient.

Let's dive into how you plant onion sprouts:

Planting Onion Sprouts

Get the pot or garden bed ready. Loosen the soil and mix in some compost.
Give the sprouts at least 3 inches of space. This way, they can grow well.
Plant the sprouts about an inch deep. Cover the roots but let the green part show.
After planting, water them well to moisten the soil and the plants.
Keep watering regularly. Aim to keep the soil moist but not soaked.
Watch out for pests or diseases. Use fungicidal spray if needed to keep them healthy.
Help the onions grow straight by tying them to small stakes as they grow.
Within 60-80 days, your onions should be ready to harvest. How big they get depends on the type.

By following these eight steps, you're on your way to a good onion harvest.

Harvesting and Storing Onions

Harvesting your onions is a big moment for gardeners. After a lot of care, it's exciting to gather them. Onions are ready to pull after 60-80 days of planting. But, how do you know it's the right time?

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You'll notice your onions are ready when certain signs appear. If the bulb fully shows above the soil, their green leaves start to die, and flower stalks rise, it’s harvest time. When taking them out, make sure to get rid of the dirt without washing. Washing them makes them wet, possibly causing rot.

Next, curing your onions is key. It helps them grow a dry, papery outer layer. This curing phase lasts about a month. Place them in a warm, well-ventilated spot. You can hang them or use wire baskets. Remember to check them sometimes.

After curing, it's all about storage. Keep your onions in baskets or mesh bags. Put them in a cool, dry place. Doing this right can let you enjoy your homegrown onions for up to 10 months.

Tips for Successful Onion Growing

To grow great onions, follow these tips:

  1. Choose the Right Soil: Onions like rich and slightly sour soil that drains well. Prep your soil by mixing in compost or fertilizer. This gives your onions the food they need to grow.
  2. Plant in Full Sun: Onions need a lot of sun, around 12 hours a day. Pick a sunny spot in your garden for them to do well.
  3. Proper Spacing: Plant sprouted onions 3 inches apart. This helps each bulb grow without fighting for space and food.
  4. Watering: Onions like water on a schedule, not every day. Once a week is good. Just don’t overdo it to keep them from rotting.
  5. Fungal Prevention: Use a fungal spray twice a week. This keeps your onions safe from diseases and promotes growth.
  6. Patience is Key: Onions don’t mature quickly. They often need 60 to 80 days to fully grow. Waiting and caring for them is important to have big, healthy bulbs.
  7. Harvesting: When your onion sprouts have become full, pull them up. Don’t wash them. This keeps moisture away and helps them store longer.
  8. Storage: Drying your onions is a must for storing them. Let the skins dry for a month. Then, keep them in a cool, dry place to stay fresh for up to 10 months.

Using these hints, you can grow a lot of tasty onions. Make the soil right, give them enough sun, and water carefully. Also, remember to protect them from fungal diseases. With love and time, a great onion crop is within reach.

Common Questions about Growing Onions from Sprouted Onions

Are you thinking of trying onion gardening? Growing onions from sprouted ones is a neat process. But, you might have questions about how to do it right. Here's a quick guide to get you started.

1. Can onions be grown indoors

Yes, you can grow onions indoors because they pollinate themselves. But, they need a lot of sunlight. If your spot doesn’t get much sun, use a grow light to help them out.

2. When is the best time to plant onion sprouts

Plant onion sprouts in the spring for the best results. Make sure it's not too cold, though. They don't like it below 28°F (-2°C). In some areas, planting in the fall or early winter is also okay.

3. How often should onions be watered

Water your onions once a week. But, if the soil looks dry, give them some extra water. Remember, onions don't like too much water. It can make their bulbs rot.

4. What type of soil do onions prefer

Good soil for onions is fertile, well-drained, and slightly acidic. Make sure your soil has the right nutrients and drains well. Adding compost or fertilizer helps give onions what they need to grow strong.

5. How much sunlight do onions need

Onions love lots of sunlight, at least 12 hours every day. Put them in a sunny spot in your garden. Or, use grow lights indoors to give them enough light.

6. How long does it take for onions to reach their optimum size

It takes about 3 months for onions to grow as big as a baseball. Care and patience are important. Keep looking after them to get the best bulb size.

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7. How long can cured onions be stored

Cured onions can last up to 10 months if stored right. After harvesting and curing, keep them in a cool, dry place. This will help preserve them for months.

Follow these tips to grow onions from sprouted ones with success. Join the fun of creating your onion garden. Enjoy the taste of homegrown onions in your meals.

Tips for Successful Onion Harvesting and Storage

Getting onions right from the field to storage is key for preserving top quality. These simple steps will help you harvest and store your onions like a pro:

1. Harvesting Onions

Getting the timing right is key when picking onions. You should pick them when the leaves start wilting or turning yellow-brown. This shows they're fully grown, usually by late summer or early fall. To pick your onions:

  1. Pull them out carefully to avoid breaking the stem.
  2. Take off loose dirt but don't wash them. Wet onions can spoil in storage.
  3. If an onion has flowered, pick it soon. Once it flowers, the bulb won't grow anymore.

2. Curing Onions

After picking, curing your onions is a must. Curing means letting them dry in a warm, dry spot. This step makes them last longer. Here's how to do it:

  1. Place them in a warm, dry area, not piled up, but spread out.
  2. Keep them away from the direct sun to avoid overheating.
  3. Wait for them to dry out, which takes about two to three weeks.
  4. As they cure, the tops will dry, and the outer skin will get papery.

3. Storing Onions

Where you keep your onions is critical for their shelf life. Follow these storing tips to keep them from spoiling:

  1. After curing, put them in a cool, dry place for storage.
  2. The best temperature for storage is 40 to 60°F (4 to 15°C).
  3. Avoid storing onions near fruits like apples and pears. These fruits let off a gas that can spoil onions.
  4. Use mesh or paper bags, or wooden crates that let air flow through to keep onions fresh.
  5. Keep an eye on your stored onions. Pull out any bad ones to stop the spoilage.

Keep these tips in mind when you're working with your onions for the best results. Whether you're starting from seeds, sets, or sprouts, you can have fresh, flavorful onions for many months this way.

Onion Type
Storage Duration
Short-day onions
1-2 months
Intermediate-day onions
2-3 months
Long-day onions
4-5 months

The picture above shows a bountiful onion harvest, ready to start the curing and storing process.


Grow onions from sprouted ones for a simple, eco-friendly garden. Peel off the outer layers and pull the sprouts apart. This lets you grow fresh onions at home.

Plant the sprouts in well-drained soil. They need at least 6 hours of sunlight each day. Water them regularly and use a 10-10-10 fertilizer every 4-6 weeks. This gives them the nutrients they need.

Seeing green leaves takes 2-3 weeks. This is a sign they're growing well. Harvest when the tops fall and the bulb is 1/3 its final size. Use a garden fork to gently lift them out.

It's important to store the onions well for later use. Let them dry in a warm, dry spot for 2-6 weeks. Cure the onions. Store them in a cool, dry place up to 10 months. If growing green onions in water, remember to change it every 3 to 5 days.

Once green onions are 8 inches long, you can use them or replant. Follow these tips for a steady supply of onions. This makes gardening both rewarding and eco-conscious.

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