PROBLEM TO BE SOLVED: To easily control the softening of the stem of a green onion according to the growth of the green onion, suppress the stuffiness and high temperature of the green onion inside the light-shielding material, and to prevent the soft white onion from being affected by the wind. Provided are a method for setting a long onion growing structure and a long onion growing structure. SOLUTION: An end stake 2 erected at a plurality of vertices of a planting range of long onions in which 1 to 3 long onions are arranged in a horizontal direction X and a plurality of long onions are arranged in a row in a column direction Y, and ends. It consists of a non-woven fabric 1 that passes through the outside of the pile 2 and surrounds the planting range, and a fixture 5 for fixing the non-woven fabric 1 to the end pile 2, and the non-woven fabric 1 covers the planting range of long onions and the end pile 2. It consists of an upright part 1A erected along the ground and a horizontal part 1B extended so as to crawl on the ground surface, and further penetrates one end of the horizontal part 1B and straddles the upright part 1A and a long onion. It is characterized in that it is composed of a U-shaped pile 3 having a U-shape that passes through the other end of the horizontal portion 1B. [Selection diagram] FIG. 7【課題】長ねぎの茎部の軟白化を長ねぎの生長に合わせて簡単にコントロールでき、かつ遮光材の内側の長ねぎのムレや高温化を抑制し、風による影響を受けにくい軟白ねぎの長ねぎの育成構造及び長ねぎの育成構造の設置方法を提供する。【解決手段】横列方向Ｘに１～３本の長ねぎが横列し縦列方向Ｙに複数本の長ねぎが縦列した長ねぎの定植範囲の複数の頂点に立設された端杭２と、端杭２の外側を通り定植範囲を取り囲むようにある不織布１と、当該不織布１を端杭２に固定するための固定具５とからなり、当該不織布１は長ねぎの定植範囲及び端杭２に沿うように立設された立設部１Ａと、地面表面を這うように展設された水平部１Ｂからなり、さらに当該水平部１Ｂの一端を貫き、立設部１Ａと長ねぎをまたぎ、当該水平部１Ｂの他端をつらぬくＵ字形状をなすＵ字杭３とからなることを特徴とする。【選択図】図７
