Onions are easy to grow both outdoors and inside. They are one of those vegetables that I never seem to have enough of because I use them every day for cooking. This article shows you how to use onions as indoor plants. Growing onions indoors is a fun project and one that the kids will love to help with.If you don’t have the space for a full scale vegetable garden outside, you can still grow onions indoors. You can even have an endless supply of them if you do it just right since onions are a cut and come again vegetable. (they will regrow from the original stock with roots.)
Growing onions indoors gives you and endless supply when you need them.
Here are a few of the ways to grow onions indoors. Kids will love these projects too!Don’t discard those old onion bottoms in the trash. You can create an endless supply of them without ever having to buy more. This can be done with all types of onions.
Place an onion in potting soil and it will spout new growth. You can either slice off the onion where the roots are, or place a small whole onion on soil and it will grow, in time. When it has developed repeat the process as often as you like.
Onions don’t need soil to grow. If you place a sprouted onion with the roots down in a glass of water, it will continue to grow on the top with new shoots.
All types of onions will regrow. One of my latest experiments was to try to grow vidalia onions from bottoms that would normally end up in the trash or compost pile. My onion sprouted quickly and gave off new growth in just a few days.
The roots of onions are very persistent. In this photo whole onion bottoms are sitting on rocks in a dish of water and the green sprouts are growing. If you cut off the green parts, more will grow.
This is one of my favorite ways to grow onions. I buy one clump of spring onions at the store. Place them in a jar of water and cut just the green tops for recipes. You will have new growth before you know it and never have to buy spring onions again. See my tips to re-grow spring onions in water here.
This idea is such a fun one for kids to do. Grow onions vertically on a window sill. You will need a 5 liter bottle that you have made holes in. Fill it with potting soil and onion sprouts and watch your harvest grow indoors! The kids will be fascinated.
Onions sprout easily and that is good for getting more onions for free. Get a 4 gallon container and add some wood chips about half way up. Fill the rest of the pot with potting soil. (the wood chips will act as drainage.) Keep the soil evenly moist and the sprouted onions will grow for you. The roots on the bottom will love the new, rich soil!
Do you ever reach into the onion bin and find one that has sprouted where the sprout actually splits the onion? Don’t just use part of it and discard. Put that sprouted part to work. Slice into the onion to expose the sprout and carefully cut the onion in two (take care not to disturb the sprout). Carefully cut around the sprout and plant. You can use the part not planted but will end up with another onion too!
Have you discovered other ways for growing onions indoors? Please share your tips in the comment section below.