Water Isotoma pusilla regularly, keeping the soil consistently moist but not waterlogged. Allow the top centimeter of soil to dry out between waterings.

Reduce watering during cooler months, but do not let the soil become completely dry. Ensure good drainage to prevent root rot.

Prune Isotoma pusilla lightly after flowering to encourage a bushier habit and more blooms. Deadhead spent flowers regularly to prolong the blooming period.

You can also trim back leggy stems to maintain a tidy appearance. Heavy pruning is rarely needed.

Isotoma pusilla can be propagated from seed sown in spring, or by taking basal cuttings in late spring or early summer. Seeds can be sown indoors or in a sheltered outdoor spot.

Cuttings should be rooted in a well-draining potting mix and kept in a warm, humid environment.

Repot Isotoma pusilla every one to two years, or when the plant becomes root-bound. Use a well-draining potting mix, such as a blend of peat and perlite. Repot in spring before new growth begins.

Ensure the new pot has adequate drainage holes.