Onions grow their roots and leaves when temperatures are still on the cool side, 55 to 75°F. When bulbs start to form, however, the plants need warm temperatures and prefer low humidity.

Plant them in 1-inch-deep (or deeper) pots filled with well-draining soil, says Rubens. Water the green onions frequently, as containers dry out quicker than in-ground beds.

The best time to plant onions depends on your zone. “In warmer zones, such as 7 and up, you can plant in late fall or winter,” says Anna Ohler, owner of Bright Lane Gardens.

Growing Sets Space them about a quarter-inch apart in the fall, water normally, and, bend the tops over before the first frost. After about a week, the bulbs will be ready to dig up to cure and ...

Onions have been cultivated for over 5,000 years, and they have been used, not only for food, but for medicine for various illnesses and joint problems.

It’s not difficult to grow onion plants for spring garden transplanting, and the following are useful tips: Onions grow slowly, so they're best seeded indoors by the end of February or before.

We’ll plant them 3 or 4 inches apart. After a few weeks, they are big enough to use as green onions (scallions), so we’ll pull out every other one when we need a few for a recipe.

Lastly, after planting, you can mostly forget about your onions. You want to moisten the soil when you plant and keep moist until the fall and winter rains take over.