The present invention relates to a process for line production of plant growth medium pots or bags with a closed bottom end. The process comprises the steps of: i) continuously folding the free end of a continuous length of water and air permeable sheet material, preferably supplied on a reel, into a sheet material tube around and beyond a free end of a growth medium feeding tube； ii) forming a first sealing in the sheet material tube by engaging and flattening the opposed walls of the sheet material tube at a position beyond the free end of the growth medium feeding tube； iii) through the free end of the growth medium feeding tube, filling the sheet material tube with a measured amount of growth medium； iv) forming a second sealing in the sheet material tube by engaging and flattening the opposed walls of the sheet material tube at a position above the position of the growth medium； v) separating the part of the sheet material tube positioned downstream from the second sealing to form a first plant growth medium pot or bag with a closed end； and optionally vi) repeating the steps i), and iii)-v) several times to form a plurality of plant growth medium pots or bags with a closed end.
