White Pampas Grass

Cortaderia selloana

Poaceae · grass grasslike · introduced

Last updated April 25, 2026

Data Maturity Baseline

This profile contains verified botanical data. Regional field notes and expert review are in progress.

Quick Facts

Height

9 ft

Spread

4-6 ft

Growth Rate

Fast

Light

Full Sun

Soil

Adaptable

Water

Moderate

Hardiness

Zone Zones 7a–9b

Bloom Time

August to February

Stage	Typical Window	What to Look For
Bud break BBCH 07	May 15-Jun 15	Buds swelling and beginning to open; first green tissue visible
Leaf emergence BBCH 11	Jun 1-Jul 1	First leaves fully unfurled on new growth
Bloom start BBCH 61	Jul 1-Jul 31	First open flowers visible; flowers yellow
Bloom end / petal fall BBCH 69	Jul 15-Aug 15	Last petals falling; flower structures fading
Fruit/seed development BBCH 71	Jun 1-Aug 31	Fruit or seed structures forming; fruit color: white
Fruit/seed maturity BBCH 85	Sep 1-Nov 30	Fruit fully colored and ripened; seed dispersal may begin
Fall color / leaf senescence BBCH 93	Oct 1-Nov 15	Leaves changing color; fall display beginning
Dormancy BBCH 97	Nov 15-Feb 28	Leafless; no active growth; dormant buds set