Isotoma fluviatilis

How to grow Isotoma fluviatilis in NZ

Isotoma fluviatilis, commonly known as blue star creeper, grows well in full sun to partial shade and prefers moist, well-drained soil. It is ideal for lawns, between pavers, borders, and groundcover in both formal and informal garden settings. Plant in a sheltered spot and water regularly during the first year to establish strong roots. Once established, it tolerates light foot traffic and occasional dry periods. Mulch to retain moisture and suppress weeds. Trim as needed to maintain coverage and encourage dense, compact growth. It produces small, blue, star-shaped flowers from spring through summer.

Isotoma fluviatilis care tips

Isotoma fluviatilis is a low-maintenance plant that spreads quickly to form a soft, flowering carpet. Plant in full sun or partial shade with moist, well-drained soil. Water regularly during dry periods, especially in the first year. It tolerates light foot traffic and is excellent for filling gaps between pavers or as a lawn alternative in small areas. Trim lightly after flowering or as needed to maintain a tidy and compact appearance. Mulch around new plantings to retain moisture and reduce weeds. Avoid very dry or waterlogged sites for best performance.

Plant size, spacing, and growth rate

Isotoma fluviatilis typically grows to 2–5 cm tall and spreads up to 1 metre wide, forming a dense, low mat. It has a fast growth rate, especially in moist, well-drained soil. For groundcover or lawn alternatives, space plants 20–30 cm apart to achieve quick, even coverage. This spacing allows plants to knit together smoothly while maintaining airflow and preventing overcrowding.

Why buy Isotoma fluviatilis from The Plant Company?

The Plant Company supplies high-quality Isotoma fluviatilis plants, specifically grown for New Zealand conditions. Our nursery-raised plants are selected for vigorous growth, healthy roots, and fast establishment. Whether you're planting between pavers, covering bare ground, or creating a low-maintenance lawn alternative, The Plant Company delivers robust, ready-to-thrive plants direct to your door with expert care and secure packaging.