The invention relates to a holder (2) for receiving plant material (5) therein, a least for a period of the cultivation thereof, comprising an elongate hollow body for receiving the plant material (5) in a cavity thereof, with at least one open outer end and with at least one access extending in longitudinal direction from the at least one open outer end for the purpose of manipulating the plant material (5) radially relative to the longitudinal axis of the body from outside.