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Oligoneuron rigidum

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Plant types and subtypes: Perennials

Light Requirements: sun

Water Use: medium

Soil Moisture: dry, moist

Soil Description: acid, neutral, average, poor, loam, clay, sand, gravel/rock

Height: 2'-5'

Bloom Time: August, September, October

Bloom Color: yellow

Leaf Color: green

Hardiness Zone: 3, 4, 5, 6, 7, 8

Additional Tags: attracts bees, attracts birds, attracts butterflies, clumping, colonizing, cottage garden plant, drought tolerant, naturalizing, rock garden plant

Oligoneuron rigidum
  • Oligoneuron rigidum
  • Oligoneuron rigidum
  • Oligoneuron rigidum

Pricing & Availability

Description

Oligoneuron rigidum

Also known as:

stiff goldenrod

,

hard-leaved goldenrod

Scientific Synonyms:

Solidago rigida

Description

Oligoneuron rigidum is a medium-sized goldenrod that typically grows between 1' to 5' tall. It is one of the showier species of the genus (formerly classified as Solidago) with dense clusters of yellow, mildly fragrant flowers appearing at the ends of terminally branched stems. It has distinctive foliage with large, stiff, hairy basal leaves. Their form can vary depending on growing conditions; they can be lance-shaped, oblong or oval, with smooth margins or slightly serrated.

Cultivation

Stiff goldenrod is native to open prairies and prefers a location in full sun. It is not particular about soil, so long as it be well-drained. Overly fertile soil will produce weaker plants that will tend to flop over under the weight of the flower heads. It is not particularly susceptible to powdery mildew, but good air circulation is recommended to minimize the risk, especially under more humid conditions. Pinching the stems early in their growing season will encourage a denser and bushier appearance. It has a month long flowering period that can be further extended by deadheading spent flowers. It is deep-rooted and fairly drought tolerant within its natural range. It can spread rather aggressively, both by means of rhizomes and by seed. Dividing mature clumps every 2-3 years will help control unwanted spread, and ensure healthier plants. Bloom times are from August to October. Zones 3-8

Propagation

Easily propagated by clump division in early spring, or by seed.

Additional Notes

This an overall very attractive and easy plant to grow. It can provide a stunning presence in cottage gardens, rock gardens, perennial flower borders, or naturalized areas. This goldenrod is one of several species formerly placed in the Solidago genus, and recently reassigned to the Oligoneuron genus.

Native Range & Classification

Recorded County Distribution: USDA data

Native Range:
AL, AR, CO, CT, DC, GA, IA, IL, IN, KS, KY, LA, MA, MD, MI, MN, MO, MS, MT, NC, ND, NE, NJ, NM, NY, OH, OK, PA, RI, SC, SD, TN, TX, VA, WI, WV, WY

Classification

Kingdom Plantae Plants
Subkingdom Tracheobionta Vascular plants
Superdivision Spermatophyta Seed plants
Division Magnoliophyta Flowering plants
Class Magnoliopsida Dicotyledons
Subclass Asteridae
Order Asterales
Family Asteraceae Aster family
Genus Oligoneuron goldenrod
Species Oligoneuron rigidum stiff goldenrod