Finding a creeping perennial that delivers a dense mat of vivid scarlet flowers, stays evergreen through winter, and chokes out weeds without demanding constant care is rare. Most ground covers either spread too aggressively or bloom for only a few weeks, leaving bare patches.
I’m Mohammad Maruf — the founder and writer behind Gardening Beyond. I spend my time comparing plant hardiness data, studying germination reports, and analyzing aggregated owner feedback to separate reliable nursery stock from disappointing seed packets.
Whether you’re covering a rocky slope or edging a pathway, the right choice depends on plant maturity, root development, and bloom reliability. This guide breaks down the top live plants and seeds for the best phlox subulata scarlet flame, so you can buy with confidence.
How To Choose The Best Phlox Subulata Scarlet Flame
Phlox subulata, commonly called moss phlox or creeping phlox, is a mat-forming perennial that thrives in poor, well-drained soil. When selecting the “Scarlet Flame” variety specifically, you need to weigh three factors: plant form (live plant vs. seed), root system maturity, and bloom color accuracy.
Live Plants vs. Seeds: The Real Trade-Off
Seeds are tempting because of the lower upfront cost, but Phlox subulata seeds require cold stratification and precise soil temperatures (around 70°F) for 10–30 days just to germinate. Even then, germination rates vary wildly based on seed age and storage conditions. Live plants, especially those grown in pint pots or plugs, skip this entire risk window and establish a root system that can survive transplant shock and drought far better than a seedling.
Root System and Plant Maturity
Look for nursery-grown plants that list their container size clearly. A 4-pack of 3.5-inch pots or a pair of pint pots typically means the plant has filled the container with roots — these transplant with minimal dieback. Bare-root plants are cheaper but require immediate planting and careful watering during the first two weeks. Avoid any listing that doesn’t specify “perennial” or list a USDA hardiness zone range (zones 3–8 is ideal).
Bloom Color Accuracy
Not all “red” creeping phlox is the same shade. “Scarlet Flame” should produce a pure red bloom, not pink or lavender. Mixed-color seed packets may contain a small percentage of red but will also yield blue, white, or pink flowers. If you want a uniform scarlet carpet, buy a named cultivar like “Scarlet Flame” sold as live plants from a nursery that guarantees the variety. Seed packets labeled “mixed” or “popstars” almost never deliver uniform color.
Quick Comparison
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| Model | Category | Best For | Key Spec | Amazon |
|---|---|---|---|---|
| Greenwood Nursery Live Plants | Live Plants (Pint Pots) | Immediate ground cover, rock gardens | 2 x Pint Pots, 4–6″ tall | Amazon |
| Winter Greenhouse Phlox 4-Pack | Live Plants (Plugs) | Blue-purple color, evergreen matting | 4 pk, Zone 4–9, 6″ height | Amazon |
| Outsidepride Scarlet Phlox Seeds | Seeds (Annual) | Self-seeding annual beds, pollinators | 1/8 lb, 8–20″ height | Amazon |
| VictoryVentor Mixed Phlox Seeds | Seeds (Perennial Mix) | Budget entry, large quantity | 1200+ seeds, 4–8 Zone | Amazon |
| CZ Grain Mixed Phlox Seeds | Seeds (Mixed Colors) | Lowest cost, full sun areas | 1000+ seeds, Moderate Water | Amazon |
In‑Depth Reviews
1. Greenwood Nursery Live Red Creeping Phlox
The Greenwood Nursery Red Creeping/Moss Phlox delivers two well-rooted pint pots of genuine Phlox subulata, giving you an immediate head start over seeds. At 4 to 6 inches tall with a spread of 12 to 18 inches per plant, these fill in quickly on slopes, retaining walls, and rock gardens. The reddish-pink blossoms form a dense, weed-suppressing mat that remains evergreen through winter.
Grown in a Wisconsin nursery with over 40 years in operation, these plants arrive inspected, trimmed, and carefully packed with the roots protected. Multiple verified reviews confirm healthy, vibrant foliage upon arrival and a high success rate when planted promptly. The 14-day guarantee provides a safety net if transit stress causes damage.
For gardeners who want a reliable scarlet carpet without waiting for seed germination, this is the most dependable option. The only minor trade-off is that you’re buying a generic red-moss phlox rather than the named “Scarlet Flame” cultivar, though the bloom color is consistently reported as a rich reddish-pink.
What works
- Mature live plants skip seed germination risk entirely
- Excellent packaging with moist roots and craft paper protection
- Dense mat chokes weeds and stays evergreen
What doesn’t
- Not guaranteed to be the exact “Scarlet Flame” cultivar
- Bare roots may need overnight soak if delayed in transit
- 14-day guarantee requires prompt inspection and photo evidence
2. Winter Greenhouse Phlox Subulata Emerald Blue 4-Pack
The Winter Greenhouse 4-pack offers an economical way to cover more ground with a single purchase. Each plant forms an evergreen mat up to 6 inches tall, producing coveted lavender-blue flowers in spring. This is a true Phlox subulata, not a seed mix, meaning the root development is already established and the plants are ready for direct ground placement.
Grown in a Wisconsin greenhouse with over 40 years of nursery experience, these arrive as compostable plugs. Verified buyers report healthy, green foliage and vigorous creeping growth after transplanting. The plants are drought-tolerant once established and require only moderate watering. The deer-resistant foliage makes them ideal for exposed hillside plantings.
The primary drawback is the blue-purple flower color — if you specifically want scarlet red, this isn’t it. However, for filling in large areas with a reliable, fast-creeping ground cover, this 4-pack offers excellent coverage per dollar spent. A few reviewers noted that some plants didn’t survive transplanting, typically due to improper hardening-off.
What works
- Four established plugs provide broad initial coverage
- Evergreen foliage with dense weed-suppressing mat
- Compostable pots reduce transplant shock
What doesn’t
- Flowers are blue-lavender, not scarlet
- Some plants may need extra hardening before outdoor planting
- Limited to spring bloom period only
3. Outsidepride Scarlet Phlox Seeds
These are Phlox drummondii (annual phlox), not Phlox subulata (perennial creeping phlox), but they deserve consideration for their vivid rose-red blooms and extended flowering period from mid-summer to fall. The seeds are GMO-free and self-seeding, meaning they can return year after year despite being technically annuals in zones 3–10. This is the best option for gardeners who want a pollinator-friendly border plant rather than a ground cover.
The 1/8-pound packet contains a generous quantity of seeds suitable for up to 1,000 square feet at recommended sowing rates. Verified buyers in Zone 9 report excellent germination and floriferous blooms that resist humidity and hold up against pests. The 8–20 inch height makes it perfect for mid-border placement or cut-flower arrangements.
On the downside, this is not a creeping plant — it grows upright and won’t form a mat. Some buyers experienced very slow germination (up to 3 months) and a low germination rate, particularly when planted in poor soil or without stratification. This is a gamble on timing and weather, not a guaranteed result like live plants.
What works
- Vibrant rose-red blooms with long summer-to-fall season
- Self-seeding habit reduces replanting effort
- Attracts bees, butterflies, and beneficial insects
What doesn’t
- Upright growth habit, not a ground cover like Phlox subulata
- Germination can be slow and uneven
- Annual nature means less permanence than perennial phlox
4. VictoryVentor Mixed Phlox Seeds
The VictoryVentor packet claims 1,200+ mixed creeping phlox seeds designed to create a perennial mat-forming ground cover. The listing specifies that creeping phlox spreads outward rather than up, making it suitable for garden edges and slopes. It’s advertised as deer-resistant and drought-tolerant, with blooms spanning spring to fall.
In practice, buyer experiences divide sharply. Some report beautiful displays with blue and yellow colors performing well, while others received only 40–50 seeds in a small unlabeled bag with no germination after three weeks. The brown seed packaging and lack of instructions frustrate many buyers, and the 3-week germination window requires patience and ideal conditions.
This is a high-risk entry. If you get a viable packet, you might enjoy a colorful mixed bed. But the inconsistency in seed count, germination rates, and customer service makes this unsuitable for anyone who needs predictable results. The mixed colors also mean you won’t get a uniform scarlet carpet — you’ll get a random assortment of pinks, blues, and yellows.
What works
- Large claimed seed count for the price
- Deer and drought resistant once established
- Some buyers report successful growth of certain colors
What doesn’t
- Frequent reports of far fewer seeds than advertised
- Mixed colors produce random blooms, not uniform scarlet
- Poor germination rate and slow customer service response
5. CZ Grain Mixed Color Phlox Seeds
The CZ Grain packet offers 1,000+ mixed color phlox seeds positioned as a creeping ground cover. The listing emphasizes full sun and moderate watering needs, with seeds packaged conveniently for direct sowing. This is the lowest-cost option in the group, making it attractive for large-area experiments where uniformity isn’t critical.
Verified buyer reviews are polarized. Some report vigorous sprouting with near 100% germination in a 500-seed sample bag, with sprouts appearing by day 8. Others report the seeds never sprouted at all, or that the packet contained only ~100 seeds rather than the advertised 1,000. The lack of varietal specificity means you’re rolling the dice on both quantity and color.
If you’re willing to gamble a small amount for a potential payoff of mixed-color phlox, this might be worth the risk. But for anyone seeking the precise scarlet red of Phlox subulata “Scarlet Flame,” this mixed seed packet will almost certainly disappoint. The inconsistent results and seed count issues make it impossible to recommend as a reliable choice.
What works
- Lowest entry cost for a large claimed seed volume
- Some batches show excellent germination rates
- Seeds are packaged cleanly for storage
What doesn’t
- Frequent reports of missing the advertised seed count
- Mixed colors cannot guarantee scarlet blooms
- Inconsistent germination; some buyers report total failure
Hardware & Specs Guide
Plant Type: Perennial vs. Annual
Phlox subulata is a true perennial — it returns year after year and forms an evergreen mat that spreads outward via rooted stems. Some seed packets sell Phlox drummondii (annual phlox), which grows upright and dies after one season, though it may self-seed. Always check the botanical name: Phlox subulata is the creeping ground cover; Phlox drummondii is upright annual.
Container Size and Root Development
Live plants are sold in pint pots (roughly 4–6 inches tall) or as bare-root bundles. Pint-pot plants have a well-developed root ball that can be planted directly into the ground with minimal transplant shock. Bare-root plants need immediate soil contact and consistent moisture. Seedlings from seeds spend the first 3–4 weeks establishing roots, during which they are vulnerable to drying out.
FAQ
Can I grow Phlox subulata from seeds to get the Scarlet Flame cultivar?
How long does it take for creeping phlox seeds to germinate?
Will Phlox subulata Scarlet Flame survive in Zone 6?
Final Thoughts: The Verdict
For most gardeners, the best phlox subulata scarlet flame winner is the Greenwood Nursery Live Red Creeping Phlox because it delivers mature, well-rooted plants that establish a dense scarlet carpet immediately, skipping the risk and delay of seed germination. If you want a budget-friendly way to cover a large area with mixed colors, grab the VictoryVentor Mixed Phlox Seeds. And for pollinator-friendly upright blooms that self-seed year after year, nothing beats the Outsidepride Scarlet Phlox Seeds.