Blue Bugle (Ajuga genevensis) Growing & Care Guide for Gardeners
Article by Dean Ravenscroft, Ph.D. - Updated 31st Jan 2024
- Plant Characteristics: Ajuga genevensis is noted for its spike-like clusters of deep blue flowers and rosettes of glossy green leaves. This ground cover plant is valued for its attractive foliage and ability to thrive in a variety of settings.
- Growing & Care: Prefers moist, well-drained soil in partial shade to full sun. It's relatively low maintenance but benefits from occasional watering during dry periods and removing of spent flower spikes to encourage more blooms.
- Tips for New Gardeners: Ideal for beginners due to its ease of growth and care. Perfect for covering bare spots in the garden. Keep an eye on its spreading habit, as it can become invasive in favorable conditions.
Ajuga genevensis belongs to the Lamiaceae family. This ground cover perennial is commonly called Blue Bugle or Alpine Bugle (Bugleweed).
The plant is loved by many gardeners for its 15 to 30 cm (6 to 12 inches) blue flower spikes.
Ajuga genevensis photograph by Rudolf Sch_fer.
The shiny dark green adds to the plant’s attractiveness when it blooms during the summer months.
The plant spread is about 60 cm (2 feet) and is generally considered to be non-invasive.
The Ajuga genevensis plant grows best in hardiness zones 3 – 10, and is hardy to UK H7.
Ajuga genevensis makes not only a good plant for ground cover, but it also makes for a great border plant.
Blue bugle photograph by Rudolf Schäfer; CC.
It will add a splash of color to a rock or woodland garden. It is a useful plant if looking for help with erosion control slopes and banks.
It loves both sun and shady areas, making it perfect to place around trees. They can also make for an attractive container plant too.
Gardener's HQ Guide to Growing Blue Bugle
It thrives well in most temperatures. However, if grown in hot, humid areas, make sure the plant is in a location where it gets good air circulation. If not, it can suffer from crown rot.
It prefers moist, well-drained soil, but it is not too picky about soil type.
It usually does not need any fertilizer unless soil quality is extremely poor.
Alpine bugle photograph by Radu Chibzii; CC.
Water often until the plant is established, then it just needs enough water to keep the soil moist.
It is recommended to cut off the flower spikes after the flowers have faded away.
Dried and Pressed Ajuga genevensis Plants image by JuVlai; CC.
The plant reproduces by underground runners. After the last frost, for propagation, simply dig up the runners and relocate them to other areas of the garden or landscape.
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Ajuga genevensis Growing and Care Guide
- Scientific Name: Ajuga genevensis.
- Common Name: Blue bugle.
- Growing Zone: USA: 3 to 10; UK H7.
- Life Cycle / Plant Type: Perennial.
Plant Details
- Plant Height (Inches): 6 to 10.
- Plant Spread (Inches): 10 to 12.
- Time of Bloom: Late spring, Early summer.
- Flower Details: Blue.
- Leaf Foliage: Green, Purple, Variegated.
- Fruit:
- Growth Form: Spreading / horizontal.
Ideal Growing Conditions
- Best Light Conditions: Shady to full sunlight.
- Rate of Growth: Average pace.
- Suitable Soil Types: Acidic, Clay, Loamy, Neutral, Sandy, Slightly alkaline, Well drained.
- Soil Moisture: Dry to Moist (Medium Moisture is likely gives best results).
Caring Conditions
- Care:
- Level of Maintenance:
- Propagation:
- How to Prune:
- Pests: Usually pest free.
- Diseases: Usually pest free.
Further Information
- Can Attract: Birds.
- Tolerant of: Cold, deer.
- Best Garden Use: Border, Container, In the control of erosion, Ground cover, Rock garden, Woodland garden.
- Family: Lamiaceae.
- Closely Related Species: Mints.
- Miscellaneous: Attractive foliage, Non-native to North America, Naturalizing, Attractive flowers / blooms.
- Genus Detail: Ajuga.
- Further Reading and References: Flora of Wisconsin and Wikipedia.
I hope that you enjoyed this guide on how to grow Ajuga genevensis. You may also enjoy the following Gardener's HQ growing guides: How to grow Salvia and Perilla plants.
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