A huge risk is that the buyers fail to close. You wouldnât believe some of the things that can happen, over my 19 years in real estate I have witnessed some crazy things. Everything from the lender going bankrupt after closing but before recording, to the buyer getting fired the night before the closing.
1 Soil needs to be well-drained, loose, and rich in nitrogen; compact soil affects bulb development. 2  Till in aged manure or fertilizer the fall before planting. 3  Onions are heavy feeders and need constant nourishment to produce big bulbs.
Preparing the Soil. Soil is best prepared for planting onions by mixing in 1 1/2 inches of compost or by adding 10-20-10 fertilizer in a trench. Dig the trench 4 inches deep, add 1/2 cup of fertilizer for each 10 feet of row, cover with 2 inches of soil and plant your onion sets on top of that.ou can grow onions in U.S. Department of Agriculture plant hardiness zones 3 through 9. Onions are a cool-season crop. If you live in a Mediterranean climate, it's best to plant what are called short day bulbs in the fall. They will only harmed if temperatures drop below 20 degrees Fahrenheit.