Bidens alba prefers consistently moist soil but can tolerate short periods of drought once established. Water deeply when the top 2-3 cm of soil feels dry. Avoid overwatering, which can lead to root rot.

Reduce watering frequency during cooler months.

Prune Bidens alba to maintain its shape, encourage bushier growth, and promote more blooms. Deadhead spent flowers regularly to prevent self-seeding.

Light pruning can be done any time, but a more substantial cutback can be performed in late winter or early spring before new growth begins.

Bidens alba is easily propagated from seeds sown directly in the garden after the last frost or started indoors a few weeks prior.

Cuttings taken from healthy stems in spring or summer will also root readily in moist soil or water. It readily self-seeds.

Repot container-grown Bidens alba every 1-2 years, or when the plant becomes root-bound. Choose a pot that is slightly larger than the current one. Use a well-draining potting mix.

Repot in spring before the active growing season commences for best results.