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Onions are a staple ingredient in kitchens worldwide, adding rich flavour and aroma to a variety of dishes. While they’re often grown in soil, onions can also thrive in water, making it an easy option for those without garden space.
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Growing onions in water requires minimal materials, just onion bottoms, a glass, and regular water changes. It’s a practical, beginner-friendly way to enjoy homegrown greens for garnishing soups, salads, and more. With a bit of sunlight and patience, you’ll have a continuous supply of fresh onion greens right from your windowsill. In this guide, you’ll discover helpful tips for successfully cultivating onions grown in water.
Six Tips To Grow Onions In Water
Gather Materials
To start growing onions in water, first, gather a few basic materials. You’ll need some onion bottoms, a clean glass or jar, and fresh water. Choosing healthy onion bottoms is essential for good growth; make sure they’re firm and without any signs of rot or decay. Clear glass containers work best because they allow you to monitor the water level and watch the roots grow. Having these items ready will make it easy to get started.
Prepare The Onion Bottoms
Once you have your onion bottoms, it’s time to prepare them. Begin by cutting the onions about one inch above the root end. This leaves enough of the onion for the root area to sprout. Remove any dry or damaged layers around the onion bottom to expose the fresh tissue beneath. This will help the roots to grow easily. Make sure to handle the cut bottoms gently, as they’re delicate and can bruise easily. Preparing the onion bottoms carefully helps set the stage for successful sprouting.
Image Credits: Freepik
Place Onion Bottoms In Water
After preparing the onion bottoms, place them root-side down in the glass or jar. Pour in enough water to cover just the roots; avoid submerging the whole onion bottom, as this can lead to rotting. By keeping only the roots in water, you give the onion bottoms a chance to absorb the moisture they need while staying fresh and healthy. Finding a sunny spot for the glass, like a windowsill, will also help encourage growth. Make sure it’s a place where the onions can receive plenty of indirect light for better sprouting.
Change The Water Regularly
To keep the onions growing well, it’s important to change the water every two or three days. Fresh water prevents bacteria buildup and keeps the roots healthy. When changing the water, rinse the glass and the onion bottoms to remove any residue. Always use clean, fresh water to fill the container again, as it’s the main source of nutrients for your onions. Consistently changing the water keeps the setup clean and helps avoid any unpleasant odours, ensuring a healthy environment for your growing onions.
Image Credits: Freepik
Wait For Sprouting
With everything set up, you’ll need a little patience as the onion roots start to grow. Within a few days to a week, you should see small roots beginning to sprout. As time goes on, green shoots will appear above the onion bottoms, indicating healthy growth. Sprouting can vary based on conditions like temperature and light, but with care, your onions should be growing steadily. Watching the progress is rewarding, and knowing you grew them yourself makes it even more enjoyable.
Image Credits: Freepik
Trim And Harvest As Needed
Once the green shoots reach a few inches in height, they’re ready to be trimmed and used. You can harvest as much or as little as you need, snipping the greens with scissors. Leaving some of the green shoots in place allows the onions to keep growing and producing more. These fresh onion greens are perfect for garnishing salads, soups, or other dishes, adding a mild onion flavour. Regular trimming promotes continued growth, letting you enjoy a steady supply of fresh greens for your kitchen.
