If the onions are harvested late, will they be empty?

The term "hollow" is not quite accurate, it should be said to be "empty and soft". There is a folk saying that "If you don't dig out the green onions before the cold dew, you will definitely feel empty". That is, if the green onions are not dug out before the cold dew, the white color of the green onions will become soft and unreal. The harvesting period of green onions can be determined based on the growth of green onions and market demand. Generally, the harvesting period for fresh onions is from October to November.

Green onion (scientific name: Allium.fistulosumL.var.gigantumMakino) is a variety of onion, which is different from the green onion (scallion) variety and the red onion (lou onion) variety. The above-ground part of the green onion plant looks like an onion. The leaves are cylindrical and hollow, and the leaf sheath stem is included into a pseudostem. If it is softened by soil, it will form a stick-shaped "onion white". Green onions are the main edible part.

The optimal temperature for green onion seeds to germinate is around 18°C. Generally, seedlings can emerge 6 to 8 days after sowing. 60 Remove the mulch film in time after the seedlings emerge. If the mulch film is removed too late, the seedlings will be weak. After the seedlings stretch out, water can be poured once to stretch the cotyledons and take root to stabilize the seedlings. Later, water can be poured 1 to 2 times again depending on the soil moisture. There should not be too much water to prevent the seedlings from growing too much. Topdressing is done 1 to 2 times throughout the seedling stage, mainly with fast-acting compound fertilizers, to promote healthy growth of the seedlings.