The fact that a sprouting onions has already started growing, it becomes a lot easier to plant them in a pot, as they already have a head start! Tip: If you find this process cumbersome, you can also plant the sprouted onion, as it is, in the pot. You can harvest when you are going to see the bulb sticking out of the soil. It is always a good idea to harvest the greens directly when needed, instead of storing them. You can save the seeds and plant them to have more onions or harvest the greens!
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Article Summary. Part 1. All rights reserved. This image may not be used by other entities without the express written consent of wikiHow, Inc. Dig your fingernails into the skin at the top of the onion bulb and rip it off piece by piece. Discard the skin when you are done. Use a knife to cut the onion's layers from the sprouts. The sprouts grow at the center of the onion bulb. Repeat on the other side then carefully slice off the onion's layers.
You can eat the onion layers if they are firm and crisp, though make sure you wash them first! If they are soft and mushy discard them. Separate the onion sprouts. You will likely find a few sprouts growing at the center of the onion bulb. Some will protrude from the bulb, others will not.
Use your hands to gently separate the sprouts from one another so they don't need to compete for space. Given proper care, each sprout can grow into a brand new onion bulb! Place the sprouts in water until roots grow. You can keep the sprouts in individual cups, glasses of bowls of water. Within a few days white roots will form at the bottom of each sprout. If white roots are already present you can plant the sprouts straight into the soil.
If you see dry, brown roots on a sprout, it means they are already dead. You want to wait for new white roots to form. Part 2. Plant the sprouts 1 inch 2. Dig an individual hole for each sprout, and cover it so only the green part sticks out.
Keep each sprout at least 3 inches apart 7. Whether indoors or outdoors, ensure the plants get ample sunlight. If you live in a cold climate, plant the sprouts in pot plants inside and gradually introduce them to the outdoors. The onions have been inside for some time and will need to adjust. Water the plants every few days. Onions are resilient, but need plenty of water to grow. Pour a little water from a gardening can, or use a hose, on the soil around the onions, not the plant itself.
Ensure the soil is well drained. Check the plants for weeds every day and remove any that appear. As the onions grow, weeds will inevitably emerge around them.
Wear garden gloves and ensure you pull the weeds out by the roots so they don't grow back. Treat the plants twice a week with fungicidal spray.
The spray will prevent harmful fungi from destroying your plants and ensure they remain healthy. A few short sprays on each plant should be enough. As an alternative, plant your onions in large containers or raised beds where you can more easily control the quality of the soil. Where fertilizer is concerned, onions are greedy. Apply 2 to 3 pounds of all-purpose garden fertilizer, such as , to every square feet of your onion bed.
Use a rake to incorporate it into the top 2 to 4 inches of soil. Onions have shallow roots and don't fare well with weeds. To enhance your chances for a successful crop, pull weeds and grasses as they sprout, especially right after planting. Spreading a 1-inch layer of organic mulch, such as dry grass clippings, around the plants helps to suppress weed growth and retain soil moisture. Locate your onion bed in an area that receives full sun or at least six hours of direct sunlight per day.
Wait four to six weeks before the last expected frost date to plant onion sets or grocery onions outside. If you live in an area where the weather is mild year-round, you have the option of planting in fall or winter.
Following planting, water the bed to a depth of 6 inches using drip irrigation if possible. Going forward, onions need about 1 inch of rainfall or irrigation per week.
When you water, water deeply — enough to moisten the soil about 6 inches down. Don't let onions dry out while they're growing, but avoid drowning them.
Either situation will create stress for your plants and diminish your harvest. To discourage rot, cut back on watering bulb onions when their tops start to yellow. Start harvesting green onion leaves when they're 3 or 4 inches high. Snip off what you need with sterilized scissors or hand pruners and wash the leaves thoroughly before using them.
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