Water regularly, especially during the growing season, to keep the soil consistently moist but not waterlogged. Reduce watering in late summer and fall as the foliage begins to die back.

Ensure good drainage to prevent root rot.

Deadhead spent flowers to tidy the plant and prevent self-seeding. Cut back the foliage to ground level in late fall or early winter once it has yellowed and died back.

This helps prevent disease and improves the plant's appearance.

Propagate by division in early autumn. Carefully dig up established clumps and divide them into smaller sections, ensuring each piece has several buds. Replant divisions promptly in well-drained soil.

Paeonia tenuifolia generally prefers to be left undisturbed once established. If repotting is necessary for young plants, do so in early autumn.

Choose a pot with good drainage and use a high-quality, well-draining potting mix.