All Mayne Tall Patio Planters have a removable tray to plant directly on top of. If you would like to remove the tray, push down firmly on one corner and lift up on the opposite corner.
Don't be afraid to use as much force as needed to get the tray to pop out of place, the tray will bend and flex around the walls of the planter and this is fine. The material is extremely durable and you will not damage it at all by doing this.
The trays can also be flipped upside down to create a raised platform for a potted plant. Similar to the removal, a little extra force may be needed to drop the tray back into position.