Oligoneuron rigidum
stiff goldenrod

Characteristics

Descriptions

Light Requirements

sun

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

Hardiness Zone

3, 4, 5, 6, 7, 8

More Filters

food for birds, colonizing, drought tolerant, pollinator favorite, rock garden plant

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

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.
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Pricing & Availability

Would you like your plants shipped later? You may choose to do so in the shopping cart.

Note: Early spring shipments might include plants that have not yet broken dormancy, or have not been vernalized and will be frost-tender. Please use your best judgment when selecting your preferred ship week.
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Why choose plants from the nearest grower? Choosing a the grower closest to you makes it more likely the plants are consistent with your ecoregion and better adapted to your location. In addition, shipping plants shorter distances typically uses fewer resources, something we can all get behind!

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Pricing & Availability

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Please note, we are unable to ship to:

AZ, CA, CO, FL, ID, LA, MT, NM, NV, OR, TX, UT, WA, WY

Grouped product items
Pricing & Availability

Full Flats

Midwest Groundcovers , IL

Available:

38-count deep plugs, full flat (38 plugs) *NEW*
$135.70
$3.57 per plant - Sold in full flats only

21 available

See all plants sold by Midwest Groundcovers.

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38-Count Deep Plugs

38-count plugs

Size
2 ¼ ” x 2 ¼ ” across by 5” deep. They are referred to as deep 38s or DP38s.

Recommended Uses
38s are landscape-ready plugs and can be planted as they are. They are the same width as our 32s, but allow for an additional inch of root depth. They can also be used as starter plants to be finished in gallon-size containers or larger.

Pros
They hit the sweet spot by combining the benefits of young plants with deep root systems and the lower cost of 38 plugs per flat. The plants are still at a vigorous stage of growth and establish quickly in the landscape. Due to their large size they require less TLC once planted than the smaller plug sizes. They are ideal for new installations as well as filling gaps in established plantings.


Cons
We haven’t really found any downsides to using 38s. However, to install them we recommend purchasing a good soil knife, or a drill auger for large installations.

Maps, Wetland Status & More

MAP OF NATIVE RANGE

Recorded County Distribution: USDA data.

More Information

Native To

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

Legal Status

Wetland Status

 

MAP OF WETLAND DELINEATION REGIONS

Wetland Status regions

 
Northcentral and Northeast
 
Eastern Mountains and Piedmont
 
Atlantic and Gulf Coastal Plain
 
Midwest
 
Great Plains
 
Western Mountains, Valleys, and Coast
 
Arid West

Interpreting Wetland Status

Code

Status

Designation

Comment

OBL

Obligate Wetland

Hydrophyte

Almost always occur in wetlands

FACW

Facultative Wetland

Hydrophyte

Usually occur in wetlands, but may occur in non-wetlands

FAC

Facultative

Hydrophyte

Occur in wetlands and non-wetlands

FACU

Facultative Upland

Nonhydrophyte

Usually occur in non-wetlands, but may occur in wetlands

UPL

Obligate Upland

Nonhydrophyte

Almost never occur in wetlands

Classification

KingdomPlantaePlants
SubkingdomTracheobiontaVascular plants
SuperdivisionSpermatophytaSeed plants
DivisionMagnoliophytaFlowering plants
ClassMagnoliopsidaDicotyledons
SubclassAsteridae
OrderAsterales
FamilyAsteraceaeAster family
GenusOligoneurongoldenrod
SpeciesOligoneuron rigidumstiff goldenrod

ADDITIONAL COMMON NAMES:

hard-leaved goldenrod

SCIENTIFIC SYNONYMS:

Solidago rigida

Plant Sizes

Sizes Sizes

Sizes info

Shipping & Planting

SHIPPING INFO:

Shipping is free on all plants orders!

Your plants will ship using each grower’s preferred method: FedEx Ground, UPS Ground, or Spee-Dee Ground (in select midwestern states). Our growers ship orders Monday through Wednesday. The farther your plants need to travel, the earlier in the week they will ship. The goal is to have all plants delivered by the end of the week.

 

Shipping plugs:

Plugs are shipped in full flats, sometimes also referred to as trays. Multiple flats can be shipped in a single box. The flats are wrapped in netting or craft paper to secure the plants, and spacers are used between flats to keep the plants from being crushed.

When you unpack your plugs, the plants will have been somewhat flattened by the netting or craft paper. They will straighten out within a couple of days. You may also gently “fluff” them a bit to speed up the process. In some cases, your plants might have been cut back before packing, if the grower deemed them to have become too tall for safe packaging. Don’t worry, though, these guys know what they’re doing and would not compromise the health of the plants. They’ll fill back in in no time.

After receiving your plants’ journey in a dark box, it will be important to acclimate them to sunlight again. Over a couple of days, you should gradually move them into their preferred light exposure, and water them as per their requirement.

Although we always recommend putting your plants in the ground as soon as possible, they can stay healthy in the flats for a considerable amount of time. The key is to respect their growing requirements: if the species requires full sun, do not store them in the shade. If it is best adapted to dry soil, do not over-water.

PLANTING INFO:

Planting plugs:

We consider plugs ready to ship when the plants’ roots have filled the entire liner cell and the plants can easily be pulled out. In some cases you will have to go about it gently, wiggling the plant by the crown, and possibly squeezing the bottom of the liner to compress the growing medium and release the roots. Other times, the plants will appear to be root bound. They are not in the traditional sense. The plants are healthy but they have used up all the growing medium available to them. Plugs are at an aggressive stage of growth. As soon as planted the roots will immediately expand into your native soil. They establish faster than plants in larger containers, because they don’t have the luxury of a lot of growing media that can inhibit the roots from venturing outside of their comfort zone.

We are not going to address area preparation because the process can be complex and is always site-specific. However, as a rule, we recommend disturbing the soil as little as possible, and we do not recommend amending the soil. If you chose the right plant for the right conditions they will thrive. Any disturbance and amendments will only encourage weeds to emerge that never had a chance to do so before.

Installing plugs cannot be easier: dig a hole large enough for the roots to fit snugly inside, then water them in to eliminate air gaps. We recommend using a soil knife, sometimes referred to as hori hori, or a drill-adapted auger if it’s a large installation. If you use an auger, you will need a powerful drill. Depending on the size of the project and the type of soil, the process can be beyond what an average drill will bear. Mulching is recommended after installation to help keep weeds down while the plants establish. Be sure to keep it away from the crown of the plants. For large projects, you may want to mulch the area before planting, rather than tiptoeing through it after the fact. As a side note: if you are installing plugs in the fall, you might want to plant them so that the crown is about ¾” lower than the surrounding soil. The winter’s freeze/thaw cycles can push plugs out if the roots did not have enough time to establish and anchor them in.