Buttonbush (Cephalanthus occidentalis) · Species Notes

Restoration Role

Riparian wetland shrub. Buttonbush carries spherical white pincushion flower heads through summer that are pollinator gold, then hard button seedheads for waterfowl and birds. It tolerates standing water better than almost anything we grow — the natural anchor for the wettest ground on the river strip.

Site Suitability

PrimaryRiver Conservation Strip, Drainage Corridor, tank and pond edges

SecondarySeasonally wet pockets, filter band

AvoidDry uplands, shallow caliche, anywhere that fully dries out

SoilsBeB, Oa; wet-tolerant

HydrologyWet feet to standing water; the wetter the better

Propagation & Care

Seed collectionCollect the hard spherical seedheads in fall; break them apart for the nutlets.

StratificationLittle needed — sow fresh on wet media, or give a short cold-moist period. Cuttings skip stratification entirely.

PropagationFrom cuttings (the fast route): softwood cuttings root quickly in wet media — buttonbush strikes readily. From seed: sow fresh on saturated media; it germinates on wet mud without much fuss.

Container progressionCutting / seedling → 5-inch pot → 1-gal fabric if held → Field planting on wet ground.

Nursery wateringKeep saturated. Buttonbush cannot really be over-watered in the nursery and will sulk if allowed to dry.

LightFull sun to part shade.

OutplantingBest age 6–12 months. Plant November–February into wet ground.

Establishment Watering

Year 1: keep the root zone wet — heavy water every 7–10 days during dry spells.
Year 2: water in drought; less critical once roots reach the water table.

Field notesThe signature shrub for the River Conservation Strip. Exceptional pollinator value and one of the few natives that thrives in standing water. Provenance “River edge” suggests on-site material — confirm and collect locally.