The present invention relates to a device for manufacturing press pots with potting compost. According to the invention the device comprises a feed for providing a layer of potting compost. Pressing means are further provided which act selectively on the layer of potting compost. In addition, the device comprises a knife for cutting the layer of potting compost into pot forms. The whole has a common denominator in the features that at least the pressing means and the knife are accommodated in a frame together with a conveyor which extends from the feed through the frame, and the pressing means and the knife are disposed at least at one position along the conveyor. In addition, the invention relates to devices with the features that the knife is in at least two parts, that the knife has larger dimensions in the direction transversely of the conveyor than a container provided for receiving the press pots therein, further comprising a feedback from or from behind the knife in the direction of transport to the feed, for the purpose of renewed use at the feed of the potting compost forming part of the at least one row outside the size of the container.