In California we can plant onion seeds in February. Find a spot that gets about 6 to 8 hours of sun each day . Draw lines in the soil about 12 inches apart.At 8 inch intervals drop a seed in the soil and cover with 1/2 inch of soil. Water and continue watering each day.
Video on planting garlic and spring onions
Video on planting onions
In no time you should have a nice crop of onions and garlic!