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// SPECIES PROFILE · GRASS · NATIVE

Seaside rush

Juncus ambiguus

Seaside rush (Juncus ambiguus) is a grass in the — family. Native range includes KS — verified against the Lady Bird Johnson Wildflower Center native distribution database. Hardy in zones 1a–11a. Mature size 1"–16". Blooms Mar–Sep.

// QUICK FACTS
Family
Group
grass
Native range
Native to 12 U.S. states, including AK, AZ, CA, CO, CT, KS…
USDA hardiness
Zones 1a–11a
Mature size
1"–16"
Sun
Water
Bloom
Mar–Sep
Wildlife value
Pollinator and wildlife support
Ecological role
native species profile
Seaside rush (Juncus ambiguus)
Juncus ambiguus — Seaside rush. Photo via iNaturalist — (c) Andre Hosper, some rights reserved (CC BY).

Field Notes

[ growing · ecology · siting · care ]

Seaside rush (Juncus ambiguus) is a grass in the — family. Native range includes KS — verified against the Lady Bird Johnson Wildflower Center native distribution database. Hardy in zones 1a–11a. Mature size 1"–16". Blooms Mar–Sep.

Why it's on this list: native species profile. Native-range data from the Lady Bird Johnson Wildflower Center (NPIN), cross-checked against iNaturalist observations. Part of Rooted Revival's regional native plant catalog — true natives for Oklahoma, Arkansas, Missouri and Kansas.

Companion Planting

[ guild · polyculture · cross-layer pairings ]

In the same native range, seaside rush pairs naturally with: Broadleaf cattail (Typha latifolia), Shortawn foxtail (Alopecurus aequalis), Shortawn foxtail (Alopecurus aequalis var. aequalis), Cosmopolitan bulrush (Bolboschoenus maritimus).

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