Water meadow Alexanders regularly, especially during dry spells, ensuring the soil remains consistently moist but not waterlogged. Reduce watering in winter as the plant enters dormancy.

Good drainage is crucial to prevent root rot, so water thoroughly when the top inch of soil feels dry.

Prune meadow Alexanders after flowering to prevent self-seeding if unwanted. Cut back the dead flower stalks to the ground to maintain a tidy appearance.

Minimal pruning is otherwise required, but removing any dead or damaged foliage in late winter or early spring is recommended.

Propagate meadow Alexanders from fresh seeds sown in autumn or early spring, as they require a period of cold stratification. Division of established clumps in early spring is also an effective method.

Sow seeds thinly in moist, well-drained soil or divide roots carefully.

Meadow Alexanders generally do not require frequent repotting and prefer to be left undisturbed once established. If propagation is done from divisions or seedlings, repot into a larger container or their final garden position when roots have filled the current pot, typically in early spring.