Dewitt Thermal Blanket
Best protective cover for gardeners extending their growing season.
Protect your plants and extend your growing season with the Dewitt Thermal Blanket. Crafted from 2.5 oz. white, non-woven, needle-punched polypropylene, this blanket effectively traps heat to shield plants from frost while allowing vital rain and irrigation to reach the roots. Its permeable design prevents foliage burn, making it safe for use even on sunny days. Ideal for late fall and early spring applications, it serves perfectly as a row cover or a protective layer for overwintering perennials and ornamentals.
$584.23
Owner Satisfaction
4.7
/ 5
Category Rank
2
/ 269
#2 in Landscape Fabric
Price vs Category Average
+477%
Above average
Material
2.5.
/ oz white, non-woven, needle-punched polypropylene
Who it's for
- Budget-conscious gardeners seeking durable, reusable seasonal protection
- Gardeners protecting sensitive plants from sudden frost
- Busy growers needing low-maintenance, long-term plant coverage
Who should skip it
- Solo gardeners managing large-scale landscape projects
- Shoppers preferring an all-in-one, ready-to-install solution
- Gardeners in climates with unpredictable, fluctuating spring temperatures
Performance breakdown
Frost Protection
Heavy-duty thermal retention keeps delicate plants safe during unexpected cold snaps.
Water Permeability
Efficiently allows rain and irrigation to reach roots without removing covers.
Sunlight Management
Breathable fabric prevents foliage burn even during bright, sunny spring days.
Durability
Needle-punched construction offers reliable seasonal strength for temporary garden applications.
Ease of Deployment
Lightweight material makes covering large garden rows a quick, manageable task.
Weed Suppression
Designed primarily for thermal regulation rather than long-term weed barrier control.
Key Specs
Material
2.5 oz. white, non-woven, needle-punched polypropylene
Dimensions
12 feet x 250 feet
Weight Density
2.5 oz.
Water Permeability
True
Fabric Construction
Needle Punched
Intended Application
Temporary Use
Weed Suppression Level
Light Duty
Features
- Traps heat for frost protection
- Allows water and irrigation penetration
- Prevents foliage burn on sunny days
- Extends selling seasons
- Functions as a row cover
- Protects overwintering plants
What customers say
Consumers view the Dewitt Thermal Blanket as a premium investment, frequently highlighting its superior construction and impressive durability. Reviewers often mention that the blanket maintains its integrity and thermal performance even after extensive use and washing, establishing strong confidence in its reliability. While the initial price point is noted, the consensus confirms that the lasting quality and consistent performance deliver excellent long term value, making it a highly recommended product for those seeking dependable warmth.
Know before you buy
Yes. Because the material is permeable and breathable, it prevents the heat buildup that typically causes foliage burn, making it safe to leave on even when the sun is out.
No, you do not. The fabric is designed to be water-permeable, allowing rain and irrigation to pass through directly to the soil and roots without needing to uncover the plants.
This blanket is designed primarily for frost protection and extending the growing season, not for weed suppression. While it offers light-duty coverage, it is intended for temporary use rather than as a permanent landscape barrier.
The 2.5 oz. density provides a balance between durability and insulation. The needle-punched construction creates a non-woven structure that effectively traps heat to shield plants from frost while remaining lightweight enough to prevent crushing delicate foliage.
Absolutely. It is an excellent choice for protecting ornamentals and perennials during the colder months, as it provides a necessary thermal buffer against frost while still allowing the plants to breathe.
Still have a question?
Ask Hayley anything about this product before you decide.
Ready to buy?
$584