Blue Peacock Moss

Blue Peacock Moss (Selaginella uncinata)

Blue Peacock Moss (Selaginella uncinata), also known as Peacock Spikemoss, Peacock Fern, and Rainbow Moss, is a low, creeping groundcover grown for its shimmering blue-green foliage. It brings a cool, jewel-toned look to shade gardens where most plants read as flat green. The fine, fernlike texture makes beds feel softer and more layered, especially around stones, paths, and woodland edges. When kept evenly moist and humid, it spreads into a dense carpet that looks intentional with very little effort.

Distinctive Features

This primitive, spore-bearing plant does not produce flowers, and its appeal comes from iridescent foliage that can shift between blue, green, and bronze tones depending on light and moisture. Creeping stems root as they travel, forming a tight mat with a delicate, feathery look that is tougher than it appears. In bright shade the color is often most intense, while harsher sun can dull the sheen unless moisture stays consistent. The plant stays low, usually about 4 to 6 inches tall, and can spread 12 to 24 inches or more over time.

Growing Conditions

• Sun: Part shade to deep shade, with best color in bright shade and protection from hot afternoon sun.
• Soil: Humus-rich, well-drained soil that stays consistently moist.
• Water: Keep evenly moist, and avoid repeated dry-down that can cause browning and dieback.
• USDA Zones: USDA Zones 6 to 10, with winter dieback possible in colder parts of the range.
• Habit: Low, creeping, mat-forming groundcover that roots along stems as it spreads.

Ideal Uses

• Focal Point: Use as a focal point in a shaded nook or between stones where the blue-green shimmer reads like a living carpet.
• Groundcover: Mass in moist shade to create a dense mat that softens edges and reduces weeds.
• Woodland Gardens: Tuck under open shrubs and along woodland borders for fine texture and cool-toned color.
• Rock and Path Edges: Plant near stones and along shaded paths where moisture collects and the foliage can spill naturally.
• Containers: Use in shaded containers as a trailing, textural filler when you can keep humidity and moisture steady.

Low Maintenance Care

• Watering: Water regularly to keep soil consistently moist, especially during heat or dry weather.
• Mulch: Apply a light organic mulch to conserve moisture while keeping the crown from staying soggy.
• Trimming: Trim back browned or tattered growth to refresh the patch and encourage dense new coverage.
• Humidity: Provide higher humidity in enclosed courtyards, terrariums, or sheltered shade for best color and vigor.
• Propagation: Divide or lift rooted sections and replant to expand coverage quickly.

Why Choose Blue Peacock Moss?

• Iridescent Color: Blue-green foliage adds a rare, shimmering tone that elevates shade plantings.
• Shade Solution: Performs in low light where many groundcovers struggle to look bright and refined.
• Fine Texture: Fernlike foliage creates a soft, layered look that pairs well with broader leaves.
• Fast Mat Formation: Creeping stems root as they spread, helping it knit into a dense carpet.
• Low Visual Maintenance: A quick trim and steady moisture keep it looking clean and intentional.

If you have a consistently moist, shaded spot that needs color and texture, Blue Peacock Moss is a standout. Give it rich soil, steady moisture, and shelter from harsh sun, and it will form a luminous ground layer that makes the whole area feel more finished. Planting in small patches and letting them knit together is the easiest way to create a natural, high-impact effect.