Western Spiderwort thrives with consistent moisture, especially during dry periods and its active growing season. While established plants show good drought tolerance, regular watering helps maintain vigorous growth and abundant flowering. Ensure the soil drains well to prevent root rot. Reduce watering significantly in winter when the plant is dormant.

Prune Western Spiderwort after the first flush of flowers to encourage reblooming and maintain a tidy appearance. Deadhead spent flowers to prevent self-seeding and direct energy into new blooms. Cut back foliage to the ground in late autumn or early spring before new growth emerges to rejuvenate the plant and remove old, unsightly leaves.

Western Spiderwort is easily propagated by division in spring or fall. Simply dig up the clump and separate it into smaller sections, ensuring each piece has roots and shoots. It can also be grown from seed, which can be sown directly outdoors in fall or early spring. Cuttings are also possible but less common for this species.

Repotting is generally needed every 2-3 years or when the plant becomes root-bound, if grown in containers. Choose a pot slightly larger than the current one and use fresh, well-draining potting mix. The best time for repotting is in early spring before active growth begins. Ensure good drainage holes to prevent waterlogging.