Experienced gardeners do not throw anything away, especially when it comes to vegetation and vegetable waste.
In some cases, it is a source of nutrients or a basis for future fertilizer. But from some vegetable peelings, you can grow quite tolerable seedlings.
Here are some vegetable cuttings you can try to root, except for onions and potatoes.
If it is the Romano variety, you can cut the leaves 2.5-5 cm from the base and place them in a container with clean water (change every other day). The roots of this variety develop quite actively, and in about 1.5-2 weeks you can plant seedlings.
If there is a stem up to 10 cm long left, then simply put it in a glass of water, leaving a couple of leaves on the stem above the water level. Put the preparation in a lighted place, but not under direct sunlight. In a few days, the cuttings will take root, and they can be planted.
Cut off the part of the root on which the most mature bud has formed and place it in the soil with the eye facing up. If you plant it in early spring, you can harvest it in the fall.
You can also grow it literally from cuttings, if you cut off 2.5 cm of the lower part of the stem and leave it in a vessel with 2 cm of water (change every other day). Keep the preparation in a sunny and warm place. In a week, the leaves will start to grow, and soon you can plant celery in the soil.