Rhynchospora triflora prefers consistently moist soil. Water thoroughly when the top centimeter of soil begins to feel dry. Avoid allowing the plant to sit in standing water, as this can lead to root rot.

Reduce watering slightly during cooler months but never let the soil dry out completely.

Pruning is generally minimal. Remove any dead or yellowing leaves as they appear to maintain a tidy appearance. If the plant becomes leggy, you can trim it back in late spring to encourage bushier growth.

Deadheading spent flower spikes is not necessary as the inflorescences are not particularly showy.

Propagation is best done by division in early spring. Carefully dig up the plant and separate it into smaller sections, ensuring each section has roots and shoots. Replant the divisions immediately into moist soil.

It can also be propagated by seed, sown in moist, well-drained conditions.

Repot Rhynchospora triflora every 2-3 years or when it becomes root-bound. This is best done in early spring before new growth begins. Use a pot with good drainage and a well-draining, slightly acidic potting mix.

Handle the roots gently to avoid damage.