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Description
Oenothera Flava, commonly known as yellow evening primrose or sundrops, is a perennial plant that belongs to the Onagraceae family. It is native to North America and can grow up to 3 feet tall. The plant has a deep taproot and spreads through runners, forming a clump of leaves and stems.
Taxonomic Information
| Domain | Eukaryota |
|---|---|
| Kingdom | Plantae |
| Phylum | Spermatophyta |
| Class | Magnoliopsida |
| Order | Myrtales |
| Family | Onagraceae |
| Genus | Oenothera |
Appearance
The leaves of Oenothera Flava are lance-shaped and up to 6 inches long. They are bright green and covered with fine hair. The flowers are 2-3 inches wide and bright yellow, with four petals that form a cross shape. They bloom from late spring to early summer and only last for one night.
Care Guide
Oenothera Flava is easy to care for and can grow in most soil types. Here are some tips for its care:
- Water: Water regularly, especially during dry spells.
- Fertilization: Fertilize in early spring with a balanced fertilizer.
- Soil: Plant in well-drained soil with a pH between 5.5 and 7.0.
- Sunlight: Plant in full sun for best results.
- Hardiness Zones: Oenothera Flava is hardy in zones 5-9.
Common Pests & Diseases
Oenothera Flava is generally pest and disease-free, but it can be affected by rust, powdery mildew, and leaf spots. To prevent these issues, avoid overhead watering and remove any infected plant material. Aphids and thrips can also be a problem, but they can be controlled with insecticidal soap or neem oil.
Habitat
Oenothera Flava is native to North America and can be found in prairies, meadows, and open woods. It prefers sunny locations and can grow in a wide range of soil types.
Question and Answer
Q: Is Oenothera Flava a good plant for a beginner gardener?
A: Yes, Oenothera Flava is easy to care for and can tolerate a wide range of growing conditions.
Q: How often should I water Oenothera Flava?
A: Water regularly, especially during dry spells. Avoid overwatering, as the plant prefers well-drained soil.
Q: Can I grow Oenothera Flava in a container?
A: Yes, Oenothera Flava can be grown in a container as long as it has good drainage and receives enough sunlight.
Q: How long do the flowers of Oenothera Flava last?
A: The flowers of Oenothera Flava only last for one night, but the plant produces new blooms throughout the growing season.
Related Plants
- Oenothera macrocarpa
- Oenothera biennis
- Oenothera fruticosa
- Oenothera missouriensis
References
- “Oenothera flava.” Missouri Botanical Garden, www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?kempercode=d270.
- “Oenothera flava (yellow evening primrose).” Gardenia, www.gardenia.net/plant/oenothera-flava-yellow-evening-primrose.
- “Oenothera flava (Yellow Evening Primrose).” Illinois Wildflowers, www.illinoiswildflowers.info/prairie/plantx/yel_primox.htm.
