The present invention provides a plant growth cultivating device, which comprises a planting tank on which a planting rack is mounted. The planting rack is a plate body and is configured with a single or a plurality of planting holes with extensible diameters. Each planting hole is planted with one plant. The planting hole may adjust its diameter according to the thickness of root or stem of the plant. Because the diameter of planting hole may be adjusted, the present invention is suitable for cultivating root vegetables without getting stuck to limit their growth.本發明提供一種植物生長培養裝置,其係包括一植栽槽,其上架設一植栽架,其為一板體,於植栽架上設有單數或複數可伸縮孔徑之植栽孔,每一植栽孔栽種一植株,植栽孔可依據植株之根或莖部粗細而調整孔徑的大小。由於植栽孔的孔徑可調整,因此適用於栽種根莖類的蔬菜,而不會卡住限制其生長。10‧‧‧植栽槽12‧‧‧植栽架14‧‧‧植栽孔16‧‧‧進水管18‧‧‧排水管20‧‧‧傾斜底板22‧‧‧氣霧化裝置
