Depending on the light and growing conditions, this Ajuga can get very dark.
Pronunciation
(a-JOO-guh)(REP-tans)
Plant Type
All Plants, Perennials Hardy
Hardiness Zone
4-10
Sunlight
full to shade, deeper color in brighter light, foliage becomes crispy in hot dry site
Moisture
prefers and grows faster in the moister areas, very slow in dry areas
Soil & Site
average to moist, not dry
Flowers
spikes of blue flowers
Leaves
scalloped leaves, to an almost black color.
Dimensions
3-6 inches tall, spread 10-12 feet or more, space 2-4 per square foot
Maintenance
control spread
Propagation
very easy from division, rooting plantlets
Misc Facts
#04-Herbaceous Perennial Plants (Allan Armitage), #68-Groundcovers for the Midwest (Voight, Hamilton, Giles)
Author's Notes
Although I have never grown this particular Ajuga, I think it will also follow the Ajuga rules for great foliage color. It will need good soil, good light and the more the light the more water it will need especially during dry spells.