A bare patch of soil between pavers, a sloping bank that washes out with every rain, or a shady border where grass refuses to grow—these are the spots where a blue flower ground cover turns a problem into a landscape feature. The right variety fills the gap with color, suppresses weeds, and demands almost nothing in return.
I’m Mohammad Maruf — the founder and writer behind Gardening Beyond. I spend my time comparing seed counts, bloom periods, hardiness zones, and mature plant dimensions across dozens of species to find the best blue flower ground cover for real-world conditions.
Whether you need a fast-spreading carpet for full sun or a shade-tolerant perennial for under trees, the right choice depends on your site’s light, soil, and foot traffic. In this guide, I break down five top options to help you find the best blue flower ground cover for your specific garden space.
How To Choose The Best Blue Flower Ground Cover
Choosing a blue flower ground cover means balancing bloom color, growth habit, and site conditions. The wrong match leads to patchy coverage or plants that struggle to establish. Focus on these three factors first.
Sunlight and Soil Moisture Tolerance
Some species like full sun and dry soil, others thrive in partial shade with consistent moisture. Forget-me-not and liriope handle shade well, while creeping thyme and blue rug juniper demand full sun. Check the expected sun exposure and moisture needs before planting.
Height and Spread at Maturity
Ground covers range from 4-inch low mats to 12-inch clumps. Shorter varieties work between pavers or as lawn alternatives; taller ones edge borders or cover slopes. Mature height and spread determine how many plants or seeds you need per square foot.
Bloom Period and Seasonal Interest
Spring-to-summer bloomers deliver color early in the season. Liriope spikes in late summer extend the show. Evergreen foliage from liriope and blue rug juniper provides year-round texture even after flowers fade.
Quick Comparison
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| Model | Category | Best For | Key Spec | Amazon |
|---|---|---|---|---|
| Liriope Super Blue | Premium Live Plant | Shade-tolerant borders | 3 live plants, evergreen foliage | Amazon |
| Blue Rug Juniper Wiltonii | Premium Live Plant | Erosion control on slopes | 3 live plants, drought tolerant | Amazon |
| Forget Me Not Seeds | Mid-Range Seed Pack | Shade under bulbs and borders | 5,000 seeds, blooms spring-summer | Amazon |
| Creeping Thyme Seeds | Budget Seed Pack | Pavers and walkway borders | 8,000 seeds, 6-inch mature height | Amazon |
| Sweet Alyssum Seeds | Budget Seed Pack | Quick white-flower carpet | 8,000 seeds, 4-inch mature height | Amazon |
In‑Depth Reviews
1. Liriope Super Blue | 3 Live Plants
This Liriope Super Blue delivers violet-purple flower spikes in late summer, extending the ground cover season long after spring bloomers fade. The evergreen foliage stays rich green through winter, providing continuous texture in borders, under trees, or along shaded pathways. Florida Foliage ships three established plants with healthy root systems.
Several buyers reported that the plants arrived smaller than expected, but the majority noted strong roots and quick establishment once planted. A handful of users expressed disappointment about size relative to cost, yet the overall feedback emphasizes the plants’ hardiness and deep blue-green leaf color once settled in.
Drought tolerance and minimal care requirements make this a solid pick for gardeners who want a low-maintenance perennial that handles partial shade. The late-summer bloom time also helps fill a color gap when many other ground covers have finished flowering.
What works
- Evergreen foliage provides year-round visual interest
- Thrives in full sun to partial shade
- Drought tolerant once established
What doesn’t
- Plants arrive small and may take 1-2 years to fill in
- Price per plant feels high compared to seed options
2. Blue Rug Juniper Wiltonii | 3 Live Plants
Blue Rug Juniper Wiltonii from Florida Foliage brings silvery-blue evergreen foliage that spreads fast on slopes, banks, and rock gardens. Its dense creeping habit stabilizes soil, making it a practical choice for erosion-prone areas where other ground covers struggle. The plants arrive as small starts, typically in 1-inch pots, with expectations of 2-3 years to produce a full carpet.
Customer reviews for this low, sprawling juniper are split between appreciation for plant health and disappointment about miniature size. Most buyers confirm the packaging is secure and the plants are alive, but many felt the photos were misleading relative to what arrived. Several gardeners who bought larger quantities still report high survival rates after planting.
Full sun and moderate watering are the only requirements once planted. This juniper tolerates sandy and rocky soils, so it fits tough sites where other ground covers fail. For slopes needing immediate coverage, plan on a higher plant density per square foot.
What works
- Excellent for erosion control on slopes
- Silvery-blue foliage stays evergreen year-round
- Tolerates sandy and rocky soil conditions
What doesn’t
- Plants are very small at arrival
- Takes multiple seasons to achieve full coverage
3. Forget Me Not Seeds – 5000 Flower Seeds
Marde Ross & Company’s Forget Me Not seeds produce sky-blue blossoms with yellow centers from spring to summer, reaching 6 to 12 inches tall. The 5,000-seed pack is designed for scattering in fall or early spring in partial shade, making it a flexible option for brightening up areas under trees or around bulb plantings. Germination takes 10 to 20 days in moist, well-drained soil.
This seed pack is a reliable way to fill larger areas without the upfront cost of live plants. The blooms attract pollinators in early spring, filling a critical nectar gap. Hardiness spans zones 3 through 9, so most temperate climates can grow these successfully.
Direct sowing on bare soil works well, but consistent moisture during germination is essential. Because these are annuals, reseeding may be required for perennial coverage in some zones. For a true blue carpet that returns each year, treat these as a self-seeding addition to a mixed planting scheme.
What works
- True blue blooms with yellow centers
- High seed count covers large areas affordably
- Attracts early-season pollinators
What doesn’t
- Annual in many zones, may need reseeding
- Requires consistent moisture for germination
4. Creeping Thyme Seeds – 8,000+ Seeds
Creeping Thyme from Marde Ross & Company is a dwarf ground cover that reaches only 6 inches tall, making it perfect for stepping stones, walkway borders, and between pavers. It handles moderate foot traffic while releasing a subtle fragrance when stepped on. The purple blooms appear in summer, adding color to high-traffic zones.
The 8,000 seeds offer excellent coverage for the cost, and the variety adapts to spring-to-fall planting windows. Frequent watering during establishment helps germination, but once rooted, creeping thyme is reasonably drought tolerant. The seed packet is untreated and GMO free, from a California nursery operating since 1985.
Because this variety stays low and spreads densely, it works as a lawn alternative in small areas. The seed is small, so careful surface sowing and light raking improve results. Patience is needed—first-season bloom may be limited, but by year two the carpet thickens.
What works
- Handles light foot traffic between pavers
- High seed count for large coverage
- Fragrant foliage when walked on
What doesn’t
- Slow to establish full coverage
- Needs frequent watering during germination
5. 8000 Sweet Alyssum Seeds – Carpet of Snow
Sweet Alyssum “Carpet of Snow” from Marde Ross & Company produces masses of tiny white flowers that form a dense ground-level mat just 4 inches tall. Blooming from spring through summer, this classic variety is among the easiest to grow from seed, whether started indoors or direct-sown on bare soil. The 8,000-seed count makes it a low-cost option for filling beds, borders, or rock gardens.
The seeds are non-GMO and neonicotinoid-free, and they attract pollinators throughout the growing season. Full sun to half sun with well-drained soils delivers the best results. Regular watering supports healthy germination and sustained flowering through hot weather.
Though the flowers are white rather than blue, this ground cover earns its place here as a reliable companion or alternative for blue-flowering varieties. Pair it with forget-me-nots or creeping thyme for a blue-and-white carpet. The short height ensures it won’t overshadow taller perennials in mixed borders.
What works
- Grows quickly from seed with reliable germination
- Long bloom period from spring through summer
- Attracts bees and butterflies
What doesn’t
- White flowers, not blue
- Needs regular watering for sustained bloom
Hardware & Specs Guide
Seed Count and Germination
Seed packs typically range from 5,000 to 8,000 seeds. Higher counts cover more area but require proper surface sowing. Germination takes 10-20 days for most species, with forget-me-not and thyme needing consistent moisture. Sweet alyssum germinates fastest in warm soil.
Bloom Period and Seasonal Timing
Spring-to-summer bloomers like forget-me-not and sweet alyssum provide early color. Liriope spikes in late summer, extending the season. Blue rug juniper is evergreen and rarely flowers, relying on foliage for visual impact. Choose based on when you want color in the landscape.
Mature Height and Spread
Sweet alyssum stays at 4 inches, creeping thyme at 6 inches, and forget-me-not at 6-12 inches. Liriope and blue rug juniper spread wider but remain low. Taller varieties work best as border edging, shorter ones between pavers or as lawn substitutes.
Hardiness Zones and Light Requirements
Forget-me-not covers zones 3-9, making it the most versatile. Creeping thyme and sweet alyssum thrive in zones 4-9 with full sun. Liriope handles partial shade well, while blue rug juniper demands full sun and tolerates sandy soils. Always match your zone and light exposure to the species.
FAQ
What blue flower ground cover grows best in shade?
How long does it take for ground cover seeds to fill in?
Can I use blue flower ground cover to stop erosion on a slope?
How many seeds do I need to cover a 10×10 foot area?
Final Thoughts: The Verdict
For most gardeners, the blue flower ground cover winner is the Liriope Super Blue because it combines evergreen foliage, late-summer color, and shade tolerance in a single low-maintenance package. If you need erosion control on a sunny slope, grab the Blue Rug Juniper Wiltonii. And for budget-friendly coverage from seed, nothing beats the Forget Me Not Seeds for true blue blooms in partial shade.