Allendan Seed Company

Oligoneuron rigidum - Stiff Goldenrod

Stiff Goldenrod - Oligoneuron rigidum
SKU: 111
Return Policy

Stiff Goldenrod (Oligoneuron rigidum) is a tall, unbranched, clump forming perennial. The central stem is coarse and covered in fine white hairs and rises over basal leaves that are up to 10" long and 5" wide. Its leaves become much smaller as they alternate up along the central stem, and are variably shaped with blunt tips. The central stem and upper side stems terminate into a corymb of small yellow flowers clustered together. The seedheads have small tufts of white hair that are distributed by the wind and can be an aggressive self seeder.


Soil Moisture:  Dry, Moderate

Sun Exposure:  Full Sun

Height:  3' - 5'

Spread:  1' - 2'

Hardiness Zone:  3 - 9

Bloom Color:  Yellow

Bloom Time:  August, September, October

Attracts:  Birds, Butterflies, Pollinators



Oligoneuron is 8 species of flowering plants known as a sperate genus, but they can be considered as a sub-section of the genus Solidago as they are also referred to as Goldenrod. Oligoneuron is separated from the other Goldenrods due to their corymbiform flower heads, which is a botanical term to describe an inflorescence that the outermost flowers are formed on longer pedicels than the inner to bring all the flowers to a common level. This gives the top of the flower head a flat or rounded profile, which they are sometimes called flat-topped Goldenrods.

Return Policy

Returns of standard seed mixes and individual species must be made in the original unopened packaging within 10 days of delivery. If you wish to return live plants, you must do so within 5 days of delivery. Returns of standard mixes, individual species, and live plants are subject to a restocking fee of 25%. Custom seed mixes may not be returned. When returning non-damaged goods, the buyer is responsible for shipping charges, and return shipping may be made by whatever means the buyer selects.

Allendan Seed Company warrants that the seed it sells will conform to the label description as required under state and federal seed laws. The seed labels show independent lab testing results, and the absence of weed seed is not represented or guaranteed. It makes no warranties, expressed or implied, of merchantability, fitness for purpose, or otherwise, which would extend beyond such descriptions. In any event its liability for breach of any warranty or contract with respect to such seed or plants is limited to the purchase price only. Allendan Seed Company further limits to the purchase price any liability of any kind on account of any negligence whatsoever on its part with respect to such seed or plants. By acceptance of the seed or plants, the buyer acknowledges that the limitations and disclaimers herein described are conditions of sale and that they constitute the entire agreement between the parties regarding warranty or any other liability.

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