GROWONIONS IN CONTAINERS | START TO FINISH GROWING TIPS: *Growing onions from seed is easy, and allows you to choose the exact varieties you want to grow *keep the soil damp but not soggy, and provide at least 5-7 hours of direct sunlight per day for good germination. *Onions are generally considered a ‘cool season crop’ because onion seedlings like to start their life when conditions are still cool. Then as the weather warms up, they switch to focus their energy on bulb formation. Therefore, monsoon season and winter early days is the best time to plant onions in most places. *Onions grow most happily in moderately rich, well-draining soil. For that we will use a mix of 50% garden soil 30% compost and 20% river sand *Onions are mature and ready to harvest once the main stalk gets weak, thin, and starts to flop over. The greens will also start to turn yellow or brown, especially at the tips
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In addition to size and color, different onion varieties are further classified as either short-day, long-day, or day-neutral onions. They’re grouped by the number of daylight hours required to trigger good bulb formation.
Short-day onion varieties will form bulbs once daylight hours increase to 10 to 12 hours per day. Long-day onions will form bulbs once they’re provided 14 hours of daylight or more. Day-neutral or “intermediate day” onion varieties form bulbs with 12 to 14 hours of daylight.
You can plant onions almost any time of year (especially if growing for green onions), but your timing will impact the size of onions you harvest and when they are harvested. Onions will get the signal to form bulbs when the day length in your area is getting the correct number of daylight hours for the variety. In general, this is around:
10-12 daylight hours for short-day onions (for Southern latitudes) 12-14 daylight hours for intermediate-day varieties (in the middle) 14-16 daylight hours for long-day varieties (for Northern latitudes)