Growing Herbs in Winter — Which Ones Survive and How

Winter herb growing is more achievable than many people assume. While basil and coriander are firmly summer herbs, a good range of culinary herbs are either fully hardy outdoors, semi-hardy with a little protection, or easy to grow on an indoor windowsill during the colder months. The key is knowing which category each herb falls into and planning accordingly.

Fully Hardy Herbs That Survive Winter Outdoors

Several herbs are reliably hardy outdoors in temperate climates and can be harvested even in winter, though more slowly. Rosemary, thyme, sage, and bay (in milder areas) stay evergreen and continue producing leaves through winter — growth slows significantly but does not stop entirely. Chives die back above ground but the bulbs survive and regrow in spring; by late winter you can force early growth by placing a cloche over them. Mint dies back to the roots in cold weather and returns vigorously in spring. Parsley is often hardy enough to overwinter in the ground with light protection such as a cloche or cold frame.

Semi-Hardy Herbs That Need Protection

Bay trees are borderline hardy — in mild areas they survive uncovered, but in colder regions they need protection from prolonged frost. Move pot-grown bays into an unheated greenhouse or conservatory before temperatures drop below -5°C. Lemon verbena dies back completely in frost and needs to be kept above freezing — in a frost-free greenhouse or cool room indoors. Lemongrass is not hardy at all and should be potted up and brought inside in autumn, placed in a bright warm room where it will continue growing slowly.

Annual Herbs on the Windowsill

Basil, coriander, parsley, chives, and mint all grow happily on a bright indoor windowsill in winter. Sow basil in late August or early September for a winter windowsill supply — later sowings do not establish well as the days shorten. Pot up a clump of chives or mint from the garden before the first frost and bring it indoors; both will continue producing leaves through winter in a warm kitchen. Use grow lights if your windowsill light is limited during the dark winter months.

Harvesting Hardy Outdoor Herbs in Winter

Pick outdoor herbs sparingly in winter — the plants are barely growing and heavy harvesting weakens them heading into the coldest months. Take small amounts of rosemary, thyme, and sage rather than cutting stems hard back. Avoid harvesting in freezing or wet conditions when plants are particularly stressed. Protect the soil around the base of Mediterranean herbs with a layer of grit or gravel mulch, which prevents waterlogging and reflects warmth onto the root zone.

Planning for Winter Harvests

The best approach is to build a mixed winter herb supply: hardy perennials outdoors (rosemary, thyme, sage), a pot of chives and mint on the windowsill, and regular small sowings of parsley and coriander under cover. Dried herbs from a summer harvest also provide useful backup through the darkest weeks. With a small cold frame or unheated greenhouse, you can extend the outdoor season for parsley, coriander, and even basil well into autumn.