I made a raised row about a foot and a half wide and covered it with 3-foot wide black plastic mulch.
Then I made small slits about 3-inches apart in both directions and pushed an onion bulb through each slit.
Two bags of onion sets of about 80 bulbs each covered about 7 feet of row.
It has worked very well keeping the weeds down.
I don’t think the bulbs are overcrowded, but next year I think I should try spacing them either 4 or 6 inches apart.
Also, although they seem to be getting enough water, I think I should make a depression down the middle of the row to collect water and allow it to seep through the slits.
Edit: 3 inches apart is definitely too close together, the onions are barely the size of golf balls.
This planting has been archived (Harvested).
Purchased from Home Depot (St. Petersburg, FL)
Latest Milestone Harvesting