1 ft (0. 30 m) or deeper: great water plantain or water hawthorne 6 to 12 in (15 to 30 cm): bog bean, lesser spearwort, or arum lily 2 to 6 in (5. 1 to 15. 2 cm): sweet flag, flowering rush, bog arum, yellow flag, corkscrew rush, golden club, pickerel weed, and giant water buttercup 2 in (5. 1 cm) or less: marsh marigold, golden buttons, Japanese water iris, water forget-me-knot, lizard’s tail, and brooklime
Plan to purchase and plant your aquatic plants between mid-spring and early summer. Check the tag on the plant to determine if you need to grow more than one, what height the plants will reach, and how far apart to plant them.
Make sure that the container is big enough to fit all of your plants into it. Do not place more than 3 plants in each container. If you don’t want to submerge the pot, you could also place it in a normal pot and position it on the edges of the pond.
You can purchase these types of material at a garden supply store or nursery.
You can harvest rocks or stones from in and around your pond or garden.
Keep in mind that aquatic growing mediums usually contain fertilizer, but it is a special slow-release kind that will not seep out into the pond water.
You can also layer more stones or rocks on top of the soil if you do not have gravel.
Don’t do this inside. Make sure to soak and drain the planter outside to avoid making a mess.
Try placing a few rocks around the sides of the pot to help keep it in place.
1 ft (0. 30 m) or deeper: great water plantain or water hawthorne 6 to 12 in (15 to 30 cm): bog bean, lesser spearwort, or arum lily 2 to 6 in (5. 1 to 15. 2 cm): sweet flag, flowering rush, bog arum, yellow flag, corkscrew rush, golden club, pickerel weed, and giant water buttercup 2 in (5. 1 cm) or less: marsh marigold, golden buttons, Japanese water iris, water forget-me-knot, lizard’s tail, and brooklime
Make sure to check the plant’s tag for information about how tall the plant will get, how far apart to plant it from other plants, and other important information.
Try not to unsettle any of the dirt or sand in this area when you pull out the rocks. Another option is to plant the marginal directly in the soil on the edges of the pond. This will integrate them into the pond without submerging the plants in water.
The rocks will keep the plant in place and the plant will eventually root itself into the soil.