Problem to be solved: to provide an implanting type long pastry cultivator that can be buried in the vertical direction without damaging at the time of cultivation without damaging the properties of the long potato at the time of growth, and at the time of harvest.This is a cultivation support tool for long tailed potatoes.The body 11 has a predetermined length and is formed into a semicircular pipe shape having an approximately arcuate shape in the end face.The tip end portion is formed with a pointed end portion 20 capable of penetrating into the ground.AndThe rear end portion is formed with a reinforcing portion 22 fitted with a metallic edge 21.In the state where the main body 11 is formed vertically in the vertical direction with the tip part 20 down to the cultivated ground G.The reinforcing part 22 is wound in the ground by striking it with the batting tool 30 from above, and it is buriedIn this state, a method for cultivating and growing seed potato of long sweet potato (m) is formed inside the body 11 having a substantially arcuate shape.Diagram【課題】長芋生育時における真下に延びる性質を損ねることなく、栽培時に手間を掛けずに略鉛直方向へ埋設し得ると共に、収穫時には長芋の表面を傷付けることなく容易に収穫することが可能な打ち込み式の長芋用栽培補助具を提供する。【解決手段】打ち込み埋設式の長芋用栽培補助具であって、本体11が所定の長さを有し端面視略円弧状を成す半円筒パイプ形状に形成されると共に、その先端部には土中に打ち込み進入可能な尖状を成す尖端部20が形成され、且つ、後端部には金属製の縁取り片21を被嵌した補強部22が形成されて成り、栽培地面Gに対し尖端部20を下にして本体11を略鉛直方向に立設した状態で、補強部22を上方から打撃具30で打ち付けることで土中に打ち込み埋設すると共に、その状態で略円弧状を成す本体11の内側に長芋Mの種芋を植え付けて栽培育成する手段を採る。【選択図】図2