Celery can be easily grown again. All you have to do is cut the base (root) away from the rest of the plant and give it adequate water and sunlight. In a few days you will notice new growth and you are well on your way to re-growing celery! Because of the potential for dangerous toxins in commercial celery, please only do this with home grown celery or that which has been purchased from a trusted organic source.
Rosemary is one of the most beloved herbs in the garden. Even if you were not a fan of the herb for culinary purposes (but how could you not be?). few can pass a rosemary bush without reaching out to touch the fragrant leaves. The fact is, it is often easier to grow rosemary from cuttings than from seed.
I’m surprised this isn’t more common than it is, but growing tomatoes from cuttings is a simple way to clone plants and to extend the growing season without the need to start more seeds or purchase additional plants. I will often pinch smaller branches of a tomato plant (the ones without blooms, of course) and suspend them in a cup of water for a few days.
When you remove the top from a home grown carrot, you can continue to grow the greens by simply replanting it and keeping it well watered. While the carrot itself will not regrow, it is possible to grow the plant and eat the carrot greens, or allow the plant to go to seed and harvest seed for future crops.
When it comes to persistence, no plant in the garden outshines mint. It is notorious for being an invasive that can even choke out a lawn if left to its own devices. Because it can grow so well in some of the most inopportune conditions, it should come as no surprise that plants in the mint family are very easy to grow from cuttings.