Fimbristylis adjuncta prefers consistently moist soil. Water thoroughly whenever the top centimeter of soil begins to feel dry. Avoid letting the soil dry out completely, as this can stress the plant.

During warmer months, more frequent watering may be necessary.

Pruning is generally minimal for Fimbristylis adjuncta. Remove any dead, yellowed, or damaged foliage as needed to maintain a tidy appearance. This can be done at any time of year.

Avoid heavy pruning, as it may disrupt the plant's natural growth habit.

Propagation can be achieved through division of established clumps in spring. Carefully separate the root ball into smaller sections, ensuring each section has roots and shoots.

Replant these divisions in suitable pots with well-draining soil.

Repot Fimbristylis adjuncta every 2-3 years or when it becomes root-bound. Choose a pot that is only slightly larger than the current one.

Spring is the ideal time for repotting to minimize transplant shock and allow for quick establishment.