The best cold-hardy plants for winter greenhouses are those that thrive in lower temperatures and shorter daylight hours. Leafy greens such as spinach, kale, Swiss chard, and arugula grow well in cool conditions and continue producing even when temperatures drop. Root vegetables like carrots, beets, radishes, and turnips develop slowly but tolerate the cold, making them excellent choices for winter harvesting.
Brassicas, including cabbage, broccoli, and Brussels sprouts, are well-suited for greenhouse cultivation in colder months. Hardy herbs such as parsley, cilantro, and chives also withstand lower temperatures and provide fresh flavors throughout the season. These crops require minimal heating, making them ideal for an energy-efficient greenhouse.
