Onion Plant Spacing
All of these varieties are widely adaptable.
Onion plant spacing. Irrigation in onion farming. Several varieties are used for onion sets. Onion seedlings will need to be transplanted when they are four to six weeks old or around three inches tall.
Provide adequate space between onion bulbs 3 4 inches even though the bag may say 1 inch as mine did. Ensure they aren t shaded as stated above onions need the maximum number of hours of daylight to grow big bulbs. How to get bigger onion bulbs.
When planting transplants into the garden space plants 4 to 5 inches apart in rows 12 to 18 inches apart. This will help retain moisture and stifle weeds. Onions should be spaced 2 to 4 inches apart with 12 to 18 inches between rows.
Onion plant spacing is a function of your intended size the closer together the smaller the bulbs will be. The transplants need spacing of about 4 to 6 inches between plants. If you re planting for a harvest of green onions they can be as little as 2 inches.
Sets or small immature onions should be spaced like onion plants. Green onions are the exception and can be planted one inch apart. Onion planting spacing the row spacing in both the furrow method and ridge method should be 10 cm x 15 cm whereas the spacing between plants should be 10 cm.
Onions can be planted as soon as the garden can be tilled in the spring usually late march or early. When planting onion plants set them in the garden a little higher than the surrounding soil and allow them to settle into place. However if you wish to grow large onion bulbs you must space the sets approximately six inches apart.