They multiply but are not invasive. Perennial (Enduring for a long time.) Once your bunching onions are established, you should have them for years and years.

Do bunching onions regrow?

Green onions are also called bunching onions, spring onions , and scallions. They are perennials that keep coming back year after year, which means you can have an endless supply of fresh scallions grown from free kitchen scraps! ... 12 best veggies and herbs, and 8 free house plants you can regrow from kitchen scraps!

How do bunching onions propagate?

Bunching onions are easy to germinate from seed. Plant just under the surface of the soil and wait a few weeks. The seedlings will look a lot like grass so make sure your garden is grass free before planting or you won't know which are plants and which are weeds.