Amaranthus californicus (Moq.) S. Watson

vernacular California amaranth — species · Amaranthaceae

USDA: AMCA
GBIF: 5384387
Rank: species

California amaranth (Amaranthus californicus) — Platephotograph · Matt LavinCC BY-SA source · iNaturalist ↗

§2Habit & range

Growth habit: Forb/herb
Duration: Annual
Group: Dicot
Family: Amaranthaceae Martinov
Genus: Amaranthus

§2a

Native status, by region

CAN Canada Native
L48 Lower 48 States Native

§2b

County-level range

· 2 counties across 1 state

Legend Native · 2 Introduced · 0 Both · 0 Hover a county for detail.

§3Cultivation specs · USDA

Recorded by the USDA Plant Materials Program.

§3a

Tolerances

Drought: Low
Shade: High
Moisture use: Medium
Fire: None
Salinity: None
Anaerobic: Low
CaCO₃: Medium
Hedging: None

§3b

Climate & soil

Cold tolerance: -3 °F minimum
Frost-free days: 175 min.
Precipitation: 14–24 in/yr
pH range: 5.5–7.5
Root depth: 4 in min.
Fertility need: Medium
Soil texture: medium, fine

§3c

Form & growth

Growth form: Multiple Stem
Growth rate: Moderate
Mature height: 1 ft
Foliage texture: Fine
Foliage colour: Green
Porosity (summer): Moderate
Porosity (winter): Porous
Flower colour: Red
Fruit colour: Red
Fire resistant: No
N fixation: None
Toxicity: None

§3d

Reproduction

Bloom period: Summer
Seed abundance: High
Seed begins: Summer
Seed ends: Summer
Spread rate: Rapid
Stratify: No
Seeds / lb: 900,000
Propagation: seed

§3e

Use & availability

Commercial availability: No Known Source
Nursery stock: No
Browse palatability: Low
Graze palatability: Medium
Palatable, human: No
Protein potential: High
Lumber: No
Christmas tree: No

§4Counties, by state

Recorded in 2 counties across 1 state.

Montana view state ↗ 2 N ▾

§5Sources & provenance

USDA PLANTS

Symbol, taxonomy, distribution, cultivation specs, native status. Public domain.

plants.usda.gov/AMCA ↗

GBIF Backbone

Canonical taxonomic identity, synonym resolution, cross-refs. CC0.

gbif.org/species/5384387 ↗

Record version

Cached and built locally. Source version on this record:

usda-plants-mt-2026-05-26

fetched 2026-05-26T03:31:52Z