Green onions and celery are really simple. After you use them up, save the bottom part. Just stick them into some water and they will re-grow. I give them fresh water every few days. The celery can be planted outside once it gets a little bigger and has some roots. The green onions could, too, but you can also just keep them in your kitchen and keep re-growing them- giving you an endless supply of fresh green onions!
I have now moved the celery to my garden:
Here is my sweet potato plant. Stick a few toothpicks into the potato and put it into water. It will start sprouting roots. It will get some big vine-like sprouts growing off the top. These are called "slips". Once these sprouts are 5-6 inches long, remove them from the potato and put them in another jar of water. These will take root and can be planted in a pot or in the garden to grow into potatoes.
Karyn is a mom to three young children. She just finished her first year of homeschooling. She grew up in FL and got a degree in Home Ec. Ed. from BYU. She taught school for a few years before having kids. Karyn loves learning along with her kids! Some hobbies: music, cooking, sewing, reading, & gardening. She runs two different blogs- one focused on homeschooling- Teach Beside Me, the other is a food blog.