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Showy Evening Primrose
Oenothera speciosa
Family - Onagracaea - Evening Primrose
This evening primrose is a prolific grower under the proper conditions. Underground stoloniferous
roots tend to make the plant spread aggressively in rich garden soils. In poor to average soils the
plant will form handsome colonies of mounded plants. The cup shaped flowers are a mildly fragrant and
are held above attractive gray-green foliage.
Showy Evening Primrose is native to the south central United States, grows twelve to twenty-four
inches tall and bears a showy, one to two inch diameter white or pink flower. It will reseed as well
as spread by roots. It is hardy in USDA Zones 5 - 8, does well in high humidity and should be a good
grower in most of the American Midwest.
This evening primrose is actually a day bloomer, absent from the show on cloudy days. This perennial
flower may be propagated by seed, division in the fall or spring, and summer cuttings. It should not
be planted if you don’t have room for it to spread. Oenothera speciosa is sometimes sold as
Hartmannia. It is a good choice for hard to maintain banks and other areas where a good ground cover
is needed.
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