Good evening scientists! We are excited to be regrowing another kitchen scrap leftover. We planted our onion base in our garden this afternoon.
Cutting Board and Knife (Adults Only)
Toothpicks (Optional, depending on your water container)
Shallow Glass or Dish with Water
- Cut the base off of an onion leaving 1-2 inches.
- Place in a shallow dish filled with water so that the top of the onion is still out of the water, but the roots are completely submerged. (Use toothpicks to keep the top out of the water if needed, we had to do this)
- Set the onion in a nicely light window sill for a few days. Check and refill daily. Once you have roots that are several inches long it it time to plant your onion.
- Remove any toothpicks. Plant by making a small hole for the roots, then cover the onion with soil so that the top is completely covered by a thin layer of soil. (Note we moved our netting out of the way to finish planting, we highly recommend using netting to deter neighborhood cats from using your garden. You can cut a large opening for each of your plants.)
Most plants grow from seeds, some can also grow from other means such as tubers (potatoes), bulbs (onions), and cuttings (rosemary). Our onion can regrow from saving the roots of the onion bulb.
Extended Learning: Did you like this investigation? Want to learn more about regrowing plants? Check out some of our other investigations