a moisturizing mat , and process for making it , are disclosed . the moisturizing mat is suitable for use as a base to promote trickle watering of plants in greenhouses . the mat comprises a wood pulp / fabric layer having an impervious plastic film backing layer . the moisturizing mat is produced by a process including the steps of depositing wood pulp on a first fibrous layer , placing a second fibrous layer on top of the wood pulp , bonding the product of step , and bonding an impervious plastic film to one face of the product of step .