how long does it take for a onion seed to produce onions
Starting onion plants from seed takes the longest for onions to fully grow, but seeds give you the most choices in variety. It can take up to five months for plants to mature enough to harvest. When starting onion plants from seed, allow the soil temperature to warm to at least 50 degrees Fahrenheit before sowing.In areas with mild winters, you can plant varieties of short-day onions four weeks before the first frost in fall.t can take up to five months for plants to mature enough to harvest. When starting onion plants from seed, allow the soil temperature to warm to at least 50 degrees Fahrenheit before sowing.