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They’re all cruciferous vegetables or leafy greens, and in most hardiness zones, you can grow them all winter long without a greenhouse. You’ll be surprised at which vegetable earned the highest ranking!
The top 15 plants on the PFV list are extremely cold-hardy, and you can push their limits in winter (in USDA hardiness zones 5 and above) by growing them under a simple low tunnel covered with midweight frost cloth.
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