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Caitlin's Giant Ajuga

Ajuga reptans ‘Caitlin’s Giant’
A groundcover with green to burgundy leaves and spikes of purple flowers in season. Grows only 6 inches in height, and is perfect for beds and planters. The Catlin's Giant Ajuga thrives in zones 3 through 9, making it exceptionally cold-hardy.

Product Details

Caitlin's Giant Ajuga

Ajuga reptans ‘Caitlin’s Giant’

Much like other Ajugas, the Catlin's Giant Ajuga is a short plant, growing only 6 inches in height but spreading 24 inches at maturity. But what sets it apart is just how tall its flowers can grow. This herbaceous perennial features green to burgundy leaves and stems with spikes of purple flowers in season. It's an excellent choice for anything from mixed plantings, landscapes, around shrubs, and even in containers.

  • Herbaceous groundcover
  • Moderate growth rate with spreading habits
  • Blooms spikes of purple flowers from spring through summer
  • Great choice for anything from beds to planters
  • Very cold-hardy

The Catlin's Giant Ajuga thrives in both sun and shade, so keep this in mind when choosing your planting spot. It loves rich and moist soil types. It grows well in zones 3 through 9, making it perfect for almost all of Texas except the southernmost parts.

Caitlin's Giant Ajuga is both tough and decorative, thriving in areas where many plants struggle, and needing minimal maintenance. Here’s what that entails:

  • Watering: Water regularly during the first growing season to help it establish. Once mature, Caitlin’s Giant is moderately drought-tolerant but prefers consistently moist (not soggy) soil. Water deeply during extended dry spells to keep foliage lush.
  • Pruning: After the flowering season ends, shear back spent blooms and any ragged foliage to encourage fresh, compact growth. You can also trim the edges of the patch to prevent unwanted spreading.
  • Fertilizing: Typically doesn’t require much feeding. If growth appears weak, apply a balanced, slow-release fertilizer in early spring. Over-fertilizing may cause excessive leafiness and reduced flowering.
  • Mulching: Apply a light 1-2 inch layer of organic mulch around plants to help retain moisture and suppress weeds. Keep mulch about 2 inches away from the crown to avoid rot.
  • Spacing: Separate your individual Caitlin’s Giant Ajugas about 12 to 18 inches apart to allow them to trail, connect, and provide full ground coverage within a year or two.

Common Issues and How to Take Care of Them

While Caitlin’s Giant Ajuga is resilient, it can encounter a few common problems if conditions aren’t ideal:

  • Crown rot: The most frequent issue, usually caused by poor drainage or overly wet soil. Ensure the site drains well and avoid overwatering.
  • Southern blight: A fungal disease that causes wilting and yellowing of leaves. Remove affected plants and avoid replanting ajuga in the same spot for a season.
  • Powdery mildew: Appears as white, dusty spots on leaves in humid conditions. Improve air circulation and avoid overhead watering.
  • Aphids: Small sap-sucking insects that can cause distorted new growth and lead to sooty mold. Use insecticidal soap or introduce ladybugs to keep populations in check.
  • Slugs and snails: Can chew holes in foliage, especially in damp shade. Use traps or organic deterrents like diatomaceous earth.

Most issues are easily prevented with proper drainage, moderate watering, and occasional thinning of crowded patches to maintain airflow.

Prune Caitlin's Giant Ajuga in late spring or early summer. Cut spent withered flower spikes all the way to the base to promote new foliage growth. You can also trim the plant throughout the season to maintain the overall appearance or shear the plant after flowering to refresh it.

It’s a fast grower, often filling its space within one growing season under favorable conditions.

No, Caitilin's Giant Ajuga isn't toxic to dogs. In fact, it's considered a pet-friendly plant, but it's always a smart idea to monitor your pet for any unusual behavior.

Keep soil evenly moist, especially during hot weather. Once established, water once a week during dry periods.

Yes, you can mow it on a high setting after flowering to tidy it up - though trimming by hand gives a cleaner look.

Yes, Caitlin's Giant Ajuga can be invasive as it's an aggressive spreader and will often crowd out other plants. It forms dense mats, especially in ideal conditions, so be on the lookout for them trying to escape gardens and move into lawns.

Yes, but only in low-traffic areas, as its large leaves can bruise easily compared to smaller ajuga varieties.

Trim edges regularly and install shallow barriers around planting areas. It spreads via stolons, so control is easy with consistent edging.

Yes, it’s generally deer and rabbit resistant, thanks to its slightly bitter foliage.

Individual plants last around 10 years in ideal conditions, but since it spreads readily, the patch renews itself continuously, creating a long-lasting groundcover.

Special Features

Herbaceous groundcover
Blooms spikes of purple flowers
Very cold-hardy
Moderate growth with spreading habits
Thrives in sun and shade
Leaf Retention:Herbaceous
Scientific Name:Ajuga reptans ‘Caitlin’s Giant’
Sun Needs:Shade
Maturity:0.5' H x 2' W
Leaf Color:Elegant purple blooms in spring, complemented by vibrant green leaves that blaze into striking gold and crimson in fall.
Flower Color:Purple
Bloom Times:Spring & Summer

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Caitlin's Giant Ajuga
Caitlin's Giant Ajuga

This plant

Scientific NameAjuga reptans ‘Caitlin’s Giant’Ajuga reptans ‘Burgundy Glow’
Size at Maturity0.5' H x 2' W0.5' H x 1' W
Leaf RetentionHerbaceousHerbaceous
Flower ColorPurplePurple
Bloom TimesSpring & SummerSpring & Summer
Sizes AvailableFlat
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