The Side Planters use the large mats. Fold back the flaps either side of the central tongue (1) and feed it through the slot in the bottom of your planter (2) then flatten out the mat as shown.
The Top Planter uses the 4 small mats that are fed through the slots from the top (1).The green side of the capillary mat always faces upwards. We recommend replacing the capillary mats each time the planters are replanted.