Whether you’re a market grower or a home gardener, these useful frost blankets can help protect your crops from damaging frost. Unlike bedsheets, heavy-weight fabrics, and other covers- frost blankets are designed to protect plants without the risk of damage as they dry quickly and allow proper airflow.
Frost Blanket Weights
Bootstrap Farmer carries frost blankets in several weights. They are available in 0.9 oz, 1.5 oz, 2.5 oz, and 4.0 oz.
| Fabric Weight (oz.) | Transparency (%) | Est. Temp Above Outside (°F) |
| 0.9 | 70 | 4-6 |
| 1.5 | 85 | 6-8 |
| 2.5 | 30 | up to 8 |
| 4.0 | 20 | 8-10 |
*These temperature estimates are based on daytime temperatures above freezing. Individual results will vary based on growing zone and location.
We recommend the 4.0 oz frost blanket for extra protection before a frost. It can be used with a 2.5 oz blanket for layered protection. The additional weight of this blanket provides approximately 4-8+ more protection than the 2.5 oz blanket.
The frost blanket can last up to three years when properly taken care of and stored. Make sure the blanket is dry, and store it away from direct sunlight.
Click here to learn more about frost blanket applications.
This item is not eligible for returns.
Grew these for the past three years and I will keep growing them for many more. I highly recommend them. Great germination rate. Every onion grew to the size of baseballs and others a bit bigger and they store very well.Best long day onion I have ever grow.
I am very happy with my heirloom seeds. I cannot wait to germinate them.
Started my seeds on 12/31/25. I’ve had almost 100% germination and the onion seedlings are a couple of inches tall at this point (1/9/26). Looking forward to a great harvest!
Grew these last year, so I bought more seeds! they were awesome, very prolific and tasted great!!
I started them early....did waterjug winter seed starts .. they did very well....grew up to be nice sturdy plants, bearing lots of fruit! Thank You!!