Cordial Canary Ajuga | Gold Foliage Ground Cover

Cordial Canary Ajuga is the first gold-leafed bugleweed bred, a vigorous perennial that stays bright chartreuse in shade and lights up any garden bed.

A plain green ground cover fills space. Cordial Canary Ajuga fills it with light. This 2021 introduction from the Feathered Friends™ series is the first Ajuga to carry a true gold foliage color—and it keeps that color in part shade where other gold plants fade to green. If you need a weed-suppressing mat that earns its keep from spring through frost, this is the perennial to plant. Here is every number, limit, and planting step you need to get it right the first time.

What Makes Cordial Canary Ajuga Different From Other Bugleweeds?

Cordial Canary is a hybrid Ajuga tenorei selected specifically for its small, gold-chartreuse leaves and its non-aggressive spread rate compared to older Ajuga reptans varieties. The foliage stays brilliant gold with lime-green variegation through summer and shifts to chartreuse tones in cooler weather. Cobalt-blue flower spikes rise six inches above the mat in late spring to early summer—a distinct contrast to the classic green-leaved ajugas.

It is, by design, the industry’s first small-leaved gold ajuga. The hybridizer, Chris Hansen, aimed for a compact form that would not overwhelm neighboring perennials the way common bugleweed sometimes does.

Hardiness Zones, Size, and Growth Rate

Cordial Canary Ajuga is rated for USDA Hardiness Zones 4 through 9, and some sources include Zone 3. That spans nearly the entire continental United States. It reaches a ground height of 4 inches and spreads to 18 inches per plant, filling in at a medium rate. Under ideal conditions, the individual plant lives about 10 years.

Where To Plant It: Sun, Soil, and Spacing Rules

Cordial Canary Ajuga performs best in part sun to shade—4 to 6 hours of sunlight is ideal. The gold color stays most vivid in part sun. In deeper shade it holds it color well too, which is unusual for gold-foliage perennials.

Soil must be well-draining. Standing water leads to crown rot and root rot, the two most common causes of failure with any ajuga. The ideal soil pH range is 3.7 to 6.5—acidic to slightly acidic. If your ground holds water after rain, amend with compost or plant this ajuga on a mild slope. Garden Design’s care guide for ajuga emphasizes that proper drainage is the single most important requirement, and that matches the data from every nursery source.

Spacing: 6 to 9 inches apart. Closer spacing fills the mat faster; wider spacing lets each plant reach its 18-inch spread without crowding.

Planting depth: Set the root ball so the top sits level with or slightly higher than the surrounding soil. Never bury the crown—covering it with soil is the fastest path to rot.

How To Care For Cordial Canary Ajuga: Water, Fertilizer, and Pruning

Water moderately and let the soil dry out between waterings. Once established, Cordial Canary is drought-tolerant and does not need frequent watering. Overwatering is the biggest mistake owners make.

Fertilizer: Ajuga seldom needs it. If your soil is especially poor, apply a slow-release all-purpose fertilizer in early spring. Over-fertilizing encourages weak growth that invites crown rot—so skip the heavy feeding.

Pruning and maintenance: After the cobalt-blue flower spikes fade in early summer, shear them off for a tidy appearance. In larger plantings, you can mow the whole mat at a high setting to remove unruly runners. Thin out crowded patches every two years to keep air flowing through the crown zone and reduce rot risk.

Winter care: In colder zones or exposed locations, apply a thin layer of mulch or compost after the ground freezes for winter protection. In milder areas, no winter cover is needed.

Is It Invasive? The Real Spreading Behavior

Cordial Canary ajuga spreads by above-ground runners (stolons), and it can be vigorous. It is listed as potentially invasive in parts of Maryland, Oregon, and West Virginia. That does not mean it will take over a garden overnight—it means you should plant it where you want a dense carpet, not next to a carefully edged perennial bed. The best use is mass planting under trees, on shaded slopes, or in areas where you want to suppress weeds without constant maintenance. The runners are easy to pull if they wander where you do not want them.

Deer and rabbits leave it alone, which is a practical advantage for countryside planting.

Finish With The Right Planting Checklist

1. Choose a spot with part sun to shade and well-draining soil.
2. Amend heavy clay with compost to improve drainage.
3. Space plants 6–9 inches apart.
4. Plant the crown level with or slightly above the soil surface—never below.
5. Water moderately until established; then let the soil dry between waterings.
6. Shear spent blooms in early summer for a tidy look.
7. Thin crowded clumps every two years to prevent rot.