Terrestrial Calla Lily in a Koi Pond: Experiment with Caution

Method

Pot the calla in aquatic soil, cap with pea gravel, use pond soil if available (less clouding). Place on a shallow shelf.

Risks

• Root rot in constant saturation.
• Koi may uproot it.
• No harm to pond/fish if it fails.

Verdict

Worth a try—experimentation is fun. But true marginals (iris, pickerelweed) are more reliable.