How long is the growing season for onions?

How long is the growing season for onions?

Onions, also known as round onions, shallots, etc., are mostly sown in early September of the first year and harvested in the second year. The growth cycle is about 330 days, but the specific time depends on the climate of the planting area.

The growth of onions goes through several stages, including the seedling stage, vigorous growth stage, bulb expansion stage, etc. The plants are sown in September in autumn and mature in June of the following year.

The growth process of onions

1. Seedling stage: From the appearance of the first true leaf of the onion to the planting of the plant is its seedling stage. During this period, the plant grows slowly and the leaves are small and weak.

2. Vigorous growth period: During this period, onions will gradually sprout roots and leaves. The root system will grow rapidly, the leaf area will increase significantly, and the assimilation effect will also be enhanced.

3. Bulb expansion period: The onion bulbs will mature rapidly during this period until the leaves begin to turn yellow and old before harvest. The bulb weight will reach its maximum about 15 days before harvest.

Onion growth period maintenance and management

1. Watering needs to be controlled during the onion seedling stage, and no topdressing should be applied to avoid reducing the plant's ability to survive the winter.

2. Onions need timely watering and topdressing during the vigorous growth period. Nitrogen fertilizer should be the main fertilizer, which can promote the growth of the above-ground part and promote the expansion of the bulb.