The onion, also known as the bulb onion or common onion, is a vegetable that is the most widely cultivated species of the genus Allium. Onions contain antioxidants and compounds that fight inflammation, decrease triglycerides and reduce cholesterol levels- all of which may lower heart disease risk.
In addition to proper fertilizing and watering techniques, onion variety selection is an important factor in growing large onions. Long-day onions grow well in Northern regions, while short-day onions produce large bulbs in the South. The number and size of the leaves at maturity predicts how large the onions will be.
Growing Onions using onion seeds at home. Onion sets are mini onion bulbs that are marketed solely for planting purpose. When you start to plant it, they grow into a complete actual onion size bulb after for about in three development months. Onion plants are at least 4 inches tall in raised beds.