Certified GKH Gardening Expert
If they have liners, you should remove the liners, though if you will only be planting annuals in these beds this is not as important but the liners will still need to be punctured to allow for drainage. After the liners are removed, you only need to fill the ponds with good soil and they will be ready to plant.
Thank you Heather!! I have removed the liners and can't wait to start planting!