Woot offers Insoma 2 Packs Plant Covers Freeze Protection 47.7" W X 71.7" H for $5.99 (orig. $22.99). Free shipping for Prime Members. 

Product Description:
Insoma Plant Covers Freeze Protection, Outdoor Plants Frost Protection Covers with Zipper & Drawstring, Frost Blankets for Tree, Shrub Potted Plants Cover in Winter 

• [High Quality Material]: Insoma plant covers for freeze protection are made of high quality Non-woven fabric with a weight of 2.2 ounces/square, which is thick enough to be windproof and protect your plants winterizing trees fruit bushes in cold weather. But it also is breathable to allow air and moisture to reach your plants.
• [Zipper & Drawstring Design]: The top-down zipper design makes the tree cover much easier and quicker to cover plants, and it also reduces the risk to young shoots and flower buds when fitting and removing. The drawstring at the bottom keeps the plant cover sturdy and won’t be blown away or fall off in bad weather .
• [Excellent Protection in All Seasons]: The plant protection covers protect plants from snow hail, frost in winter and insects,birds, excess sun during the growing season.
• [4 Sizes for Your Plants]: The 2-pack plant covers have 4 sizes for you to choose from. This package set includes 2 plant covers, measuring size 47.7" wide X 71.7" high.
• [Wide Application]:The plant covers for outdoor plants are perfect for flowers, vegetables, lemon trees, banana trees, mango trees, tomatoes, rose bushes, shrubs, strawberry plant in winter and growing season. The plant protector is waterproof, windproof and moth-proof.