Science · Plants, Natives & Crops
Solidago (Goldenrod)
Goldenrods are diverse yellow-flowered perennials; western natives such as S. velutina subsp. californica differ from eastern meadow species and hybrids.
Solidago spp. · Herbaceous perennial; genus-level label
Profile
- Light
- Usually sun; check the identified species
- Bloom
- Typically summer into fall
- Spread
- Many spread by rhizomes; clumping cultivars differ
- Identity
- Not ragweed (Ambrosia); do not attribute ragweed pollen allergies to goldenrod automatically
Water & soil targets
- Moisture (VWC)
- Site-calibrated; depends on soil texture
- Salinity tolerance
- Not reliably characterized for this catalog label; avoid saline irrigation and diagnose with soil/water testing.
- Drought tolerance
- Species-dependent; dryland California taxa differ from moist-meadow species.
Optimal root measurement depth
3–8 in
Shallow fibrous or rhizomatous roots. Typical guidance; confirm with a soil probe on site.
Select species before scheduling irrigation. Maintain moderate moisture during establishment, then match watering to its native habitat and drainage.
Problems to watch
- Powdery mildew
- Rust
- Aggressive rhizome spread in vigorous species
Stress signs
- White powder on leaves
- Orange-brown rust pustules
- Persistent wilt and drying basal foliage
Where you'll find it
- Late-season pollinator forage
- Meadow or habitat borders
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All Science profilesGeneral agronomic guidance and typical ranges; actual targets vary by site, soil, climate and season.