Protect Tender Plants This Winter: Mulching Tips & Alternatives
Gardening enthusiasts in colder climates are advised to protect their tender plants over winter. Mulching can provide crucial insulation, but it's not suitable for all plants or soil types. Here's how to navigate winter plant care.
In very cold regions or heavy, waterlogged soils, avoid mulching tender plants. Instead, consider other protection methods. However, for borderline hardy plants, a thick layer of compost, straw, or bark chippings can shield them from harsh winter elements.
Hardy begonias, for instance, can withstand temperatures down to 32°F (0°C) with mulch protection in US hardiness zones 6-9. In Germany, seven plants can be mulched in October to help them survive winter: large nettle, watercress, European beech, white goosefoot, hazel, dog rose, and blackthorn.
In the US, cannas in zones 7 and up can tolerate temperatures down to 15°F (-9°C) and may not need lifting. Dahlias in zones 7 to 10 can be overwintered in the ground with mulch. Agapanthus can also overwinter with mulch, but evergreen types should be brought indoors. Gladioli can be left in the ground with mulch protection in zone 4 and above.
Remember, tender plants should not be left unprotected in flower beds all winter. Verbena, especially half-hardy types, benefits from a good layer of mulch over winter.
Mulching can be a lifesaver for overwintering plants, but it's not a one-size-fits-all solution. Understanding your plant's hardiness and local climate is key to successful winter gardening.
