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(Isodon effusus)
Long-Tubed Trumpet Spurflower (Isodon effusus)
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© harum.koh
CC BY-SA 4.0
Image By:
© harum.koh
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Copyright:
CC BY-SA 4.0
Copyright Notice:
Photo by: © harum.koh | License Type: CC BY-SA 4.0 | License URL: http://creativecommons.org/licenses/by-sa/4.0/ | Uploader: harumkoh | Publisher: iNaturalist |
Estimated Native Range
Climate Requirements for Farmington, Minnesota
| This Plant | Your Site | Plant Suitability for Your Location | ||
|---|---|---|---|---|
| • Precipitation | 63" - 75" | 31" | Your precipitation may be insufficient for this plant. Irrigate N" / year. | Irrigate N" / year |
| • High Temp. | 77°F - 85°F | 83°F | Your summer temperatures are normal for this plant. | Excellent |
| • Low Temp. | 17°F - 31°F | 3°F | Your winter temperatures may be too cold for this plant | Too cold |
This plant should grow well at your location with about N inches per year (Y minutes per month) of irrigation.
Summary
Isodon effusus, commonly known as Long-Tubed Trumpet Spurflower, is a deciduous perennial herb native to the understory of moist deciduous forests in Japan. This plant typically grows to a height of 2-4 feet (0.6-1.2 meters) and a width of 2-3 feet (0.6-0.9 meters). It features an upright, clumping form with lance-shaped leaves and produces tubular, purple flowers that are arranged in whorls along the stem, blooming in late summer to fall. The flowers are quite showy and attract pollinators such as bees and butterflies.
Long-Tubed Trumpet Spurflower is valued for its late-season blooms and its ability to thrive in shaded garden areas where other flowering plants may not perform as well. It is used in border plantings, woodland gardens, and as an accent plant in mixed beds. This species prefers consistently moist, well-drained soils rich in organic matter and can tolerate a range of light conditions from part shade to full sun. While generally low-maintenance, it may require staking in very rich soils or overly shaded conditions to prevent stem flopping. It is not known for serious pest or disease problems, but good air circulation can help prevent fungal issues.CC BY-SA 4.0
Long-Tubed Trumpet Spurflower is valued for its late-season blooms and its ability to thrive in shaded garden areas where other flowering plants may not perform as well. It is used in border plantings, woodland gardens, and as an accent plant in mixed beds. This species prefers consistently moist, well-drained soils rich in organic matter and can tolerate a range of light conditions from part shade to full sun. While generally low-maintenance, it may require staking in very rich soils or overly shaded conditions to prevent stem flopping. It is not known for serious pest or disease problems, but good air circulation can help prevent fungal issues.CC BY-SA 4.0
Plant Description
- Plant Type: Herb
- Height: 2-4 feet
- Width: 2-3 feet
- Growth Rate: Moderate
- Flower Color: Purple
- Flowering Season: Fall
- Leaf Retention: Deciduous
Growth Requirements
- Sun: Part Shade, Full Sun
- Water: Medium
- Drainage: Medium
Common Uses
Bee Garden, Bird Garden, Border Plant, Butterfly Garden, Hummingbird Garden, Low Maintenance
Natural Habitat
Understory of moist deciduous forests in Japan
Other Names
Common Names:
Scientific Names: Isodon effusus, Rabdosia effusa, Plectranthus effusus, Plectranthus longitubus var. effusus, Amethystanthus effusus, Amethystanthus effusus var. leucanthus, Amethystanthus longitubus var. effusus, Isodon longitubus var. effusus, Rabdosia effusa f. leucantha
GBIF Accepted Name: Isodon effusus (Maxim.) H.Hara