DeWitt makes landscape fabrics that actually work in Montana conditions. Their line ranges from lightweight frost blankets to heavy-duty commercial weed barriers, with specific weights engineered for different jobs. The weight determines everything — temperature protection, durability, and whether it’ll survive Montana freeze-thaw cycles.
Frost Protection That Delivers Real Temperature Gains
The SUPREME650 provides 6-8°F of frost protection — that’s the difference between losing your tomatoes in early September and harvesting into October. At 1.5 oz weight, it’s their heavy-duty frost blanket, substantially thicker than the cheap 0.5 oz stuff that tears the first time wind picks up.
The fabric comes folded to 3 feet on the roll, which makes it manageable when you’re covering rows solo. Light and moisture still reach plants while the fabric maintains warmer temperatures underneath. That’s critical — suffocating plants defeats the purpose.
| Specification | Value |
|---|---|
| Weight | 1.5 oz |
| Dimensions | 6 ft × 50 ft |
| Coverage | 300 sq ft |
| Temperature Protection | 6-8°F warmer than outside air |
| Material | Non-woven plastic fabric |
The temperature boost matters more here than anywhere. Lighter 0.5 oz or 1.0 oz fabrics typically provide only 2-4°F protection. When you’re fighting to extend a 90-day growing season, every degree counts.
Commercial-Grade Weed Barrier Built for Professionals
The PRO5 weed barrier at 5 oz weight is approved by landscape architects and government agencies. That’s not marketing fluff — it means the fabric passed testing for commercial installations where failure isn’t an option.
The 12-inch striping helps with plant alignment during installation. Sounds minor until you’re laying 250 feet of fabric and trying to keep rows straight. The woven, needle-punched polypropylene construction conserves soil moisture while preventing weed germination.
DeWitt also makes a 15-year rated Pointbond fabric for permanent landscape installations. That’s the stuff for under rock mulch or pathways where you’re never pulling it up again.
Anchor Pins Engineered for Rocky Montana Soils
The 11-gauge steel landscape pins come in 75-packs — enough for a real job, not the tiny 10-packs that leave you making multiple trips to the store. At 6 inches long, they provide deep anchoring in various soil conditions.
The critical factor: 11-gauge steel can be difficult to install in hard or rocky soil. That’s exactly what Montana has in most areas. But that heavy gauge also means they won’t bend when you hit decomposed granite two inches down. They secure fabric, netting, drip irrigation tubing, and even sod.
Frequently Asked Questions
Q: What’s the difference between DeWitt’s frost blankets and their weed barriers?
Frost blankets like the SUPREME650 are lightweight (1.5 oz) non-woven fabrics designed to trap heat while allowing light and moisture through. Weed barriers like the PRO5 are heavier (5 oz) woven fabrics that block weed growth while allowing water penetration. Different purposes, different construction.
Q: How long do these fabrics last in Montana weather?
The frost blankets are reusable year after year if you store them dry. The Pointbond line offers 15-year rated products for permanent installations. Standard weed barriers fall somewhere between, depending on UV exposure and foot traffic.
Q: Do the landscape pins work in frozen ground?
The 11-gauge steel construction provides weather resistance and deep anchoring capabilities. Pre-drilling helps in frozen conditions. These aren’t the flimsy pins that bend on contact — they’ll drive through partially frozen soil if you’re determined enough.
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