Buttonbush
Cephalanthus occidentalis
Rubiaceae · broadleaf · introduced
Quick Facts
Height
3–6 ft
Growth Rate
Moderate
Light
Part Shade
Soil
Wet Tolerant
Water
High
Hardiness
Zone Zones 4a–8b
Bloom Time
June
Phenological Calendar
| Stage | Typical Window |
|---|---|
| Bud break BBCH 07 | Feb 15-Mar 15 |
| Leaf emergence BBCH 11 | Mar 1-Apr 1 |
| Bloom start BBCH 61 | Jun 15-Aug 15 |
| Bloom end / petal fall BBCH 69 | Jul 15-Aug 31 |
| Fruit/seed development BBCH 71 | Sep 1-Nov 30 |
| Leaf drop BBCH 93 | Oct 15-Nov 30 |
| Dormancy BBCH 97 | Nov 15-Feb 28 |