Podostemum weddellianum thrives in constantly flowing, oxygen-rich aquatic environments. Replicating this requires submerged cultivation in aquariums with strong water movement from filters or pumps.

Water levels should remain consistently high, ensuring the plant is fully submerged.

Pruning is generally not required for Podostemum weddellianum as it naturally forms a low-profile mat. If excessive growth occurs or dead/decaying material is observed, careful trimming with sharp aquatic scissors can be performed to maintain shape and health.

Propagation is primarily achieved through fragmentation. Small sections of the parent plant, containing roots or attachment points, can be gently detached and secured to a new substrate.

These fragments will then grow and establish themselves in suitable conditions.

Repotting is not a typical horticultural practice for Podostemum weddellianum. Instead of repotting, the objective is to establish the plant on a suitable substrate (e. g.

, rocks, driftwood) that can be moved or secured within its aquatic environment. This allows for natural expansion.