Outsidepride Irish Moss Ground Cover Seeds - Perennial Low G

The Verdict

Let’s be blunt: Irish moss (Sagina subulata) is one of the most finicky ground covers you can grow from seed. The 3.2-star rating on Amazon isn’t a surprise — this product gets bought by people expecting “moss in a month” and gets abandoned by people who don’t realize they’re signing up for a 90-day patience project.

What’s actually in the packet
Outsidepride ships a 1-ounce packet (about 100,000 seeds) that covers roughly 100 square feet if you sow it properly. The seeds are dust-fine — you’ll need to mix them with sand to spread evenly. The packet gives basic sowing depth (surface-sow, press down, don’t cover) but skips critical details like soil prep and stratification. You get seeds, a paper envelope, and a tiny instruction slip. That’s it.

Performance: the real story
I’ve grown this in zone 6b containers and directly in garden beds. Here’s what 160 ratings and my own testing reveal:

• Germination is a marathon, not a sprint. Most buyers report 3-6 weeks to see any green, and even then it’s patchy. One verified review said: “Waited 4 weeks, thought they were dead, then suddenly little green dots appeared. By week 8 I had a carpet.” That tracks with my experience.
• Moisture is everything. The seeds won’t sprout unless kept consistently damp — not wet, but never dry. Miss two days of misting in week one and you’ll get bare spots that never fill in.
• The mature plant delivers. Once established (about 4-6 months), the mat is genuinely lovely — soft, springy, bright green, with tiny white flowers in summer. It handles light foot traffic and suppresses weeds well.

What buyers consistently praise
The value and the end result. Multiple reviews note the packet is huge for the price — one gardener wrote: “Used half a packet on a 6x6 foot path and still have enough for two more beds.” People who stuck it out through the slow start almost universally love the final look.

Where it falls short (honestly)

• Weed competition is brutal. Irish moss has no defense against fast-growing weeds. You’ll be hand-pulling for the first season.
• Heat is a killer. In zones 7+ with afternoon sun, this browns out fast. It wants morning sun, afternoon shade.
• The instructions undersell the difficulty. Outsidepride doesn’t warn you that this needs 8+ weeks of babying before it’s safe. Several 1-star reviews read like: “Followed instructions exactly, got nothing in 3 weeks, threw it out.” They weren’t wrong — the instructions are just too optimistic.

Who should buy this

• Patient gardeners who enjoy the process and have a partially shaded spot with rich, acidic soil.
• Container growers — I found pots far easier to manage than open ground. You control moisture and weeds.
• Budget landscapers who need to cover a large area cheaply and don’t mind a 6-month establishment period.

Skip it if

• You want a quick lawn alternative. Buy plugs or sod instead.
• You live in hot, dry climates (zones 8+ without shade).
• You’re not willing to mist twice daily for the first month.

FAQ shoppers actually ask

Q: Can I grow this indoors first?
Yes — start in trays with a humidity dome. Use a seed-starting mix, surface-sow, and keep at 65-70°F. Transplant after 6-8 weeks when seedlings are about an inch tall.

Q: How long until it fills in completely?
Expect 4-6 months for continuous coverage. First year looks sparse; second year is when it truly matures.

Q: Will it survive winter?
In zones 4-8, yes — it stays semi-evergreen in mild winters. In harsh zones, it dies back but regrows from roots in spring.

The Verdict
Buy it if you’re a patient gardener with partial shade and a willingness to baby seeds for two months. Skip it if you want quick results or live somewhere hot. For $8, it’s a low-risk experiment — but manage your expectations: this is a three-season project, not a weekend lawn.

Rating: 3.3/5 — Decent value, honest limitations, and a payoff that only comes to those who don’t give up.

Where to Buy

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Last updated: 2026-08-06. Ratings and prices current as of review date. Verify on Amazon before purchasing.