Mâche and Claytonia: Cold-Hardy Winter Salads Worth Growing

I spent three winters buying sad plastic clamshells of mixed greens from the grocery store before I realized I was an idiot. Not a dramatic idiot. Just the regular kind who didn’t know mâche and claytonia existed. These two are among the best cold-hardy winter salads you can grow, and almost nobody bothers.

These two plants grow through actual freezing weather with basically no help from you. Not “oh they can handle a light frost” tough. I mean frozen-solid-overnight-and-totally-fine tough. And almost nobody plants them. Which, if you think about it, is a pretty good deal for those of us who like being smug about salad.

What You’re Actually Getting Into

Mâche (also called corn salad) is a tiny-leafed rosette plant with a mild, almost nutty flavor. It’s been grown in European winter gardens forever and is genuinely confused by warm weather, which is why you almost never see it in summer. Claytonia, or miner’s lettuce, is a Pacific Northwest native that produces these round, succulent little leaves with the stem running right through the middle. It looks weird. It tastes great. Gold miners apparently ate it to avoid scurvy, which is a solid endorsement.

Both of them will sit quietly in an unheated cold frame through the darkest, coldest months and just keep growing. Slowly, sure. But growing.

When and How to Sow

July is the time to get moving on this. I know it feels wrong to be thinking about cold-hardy winter salads when it’s finally warm enough to eat outside, but that’s exactly the point. These plants need time to establish before the days get really short.

Direct sow both of them. I tried starting mâche indoors and transplanting once, and that was dumb. It hates root disturbance and will sulk for weeks. So. Just sow it where it’s going to grow.

For mâche, scatter seeds fairly thickly and thin to about 4 inches apart. The seeds are tiny and annoying and will stick to your fingers. I’ve started mixing them with a pinch of dry sand to get a more even spread, which works okay. Germination can be spotty if it’s too warm (above 68 degrees or so), so if you’re in a warm stretch, wait a couple weeks or find a shadier spot to start them.

Claytonia is even easier. Broadcast the seeds, rake them in lightly, and mostly ignore them. They’ll self-sow aggressively once established, which is either a feature or a bug depending on your personality. Thin to about 6 inches if you want bigger plants, or just let them go and harvest the whole bed as cut-and-come-again.

If you’re also doing spinach this time of year, the timing and approach is really similar. Sowing spinach in late summer for a spring harvest follows the same general logic, and you can honestly run all three in the same frame if you have the space.

The Cold Frame Situation

You don’t need anything fancy. An old storm window propped on four cinder blocks works fine. I’ve used a wooden frame with a sheet of corrugated plastic I picked up at the local big box store for around $8. The goal is just to knock the wind off and stop the soil from freezing solid for extended periods. Both mâche and claytonia can handle hard frosts, but repeated deep freezes with no protection will slow them way down.

If you’re already overwintering brassicas, the same frame setup works perfectly for these two. I tuck claytonia in the corners around my kale and it just does its thing all winter.

Ventilate on mild days. Seriously, more plants die from being cooked in a closed frame on a 45-degree sunny January afternoon than from the cold. Prop it open a crack and go back inside.

Harvesting Through the Dark Months

This is the part I like best. Outer leaves only. Don’t pull the whole plant. With mâche, snip a few rosettes at a time from the base and leave the rest. With claytonia, cut the stems an inch above the soil and it’ll resprout. Repeat as needed, which in December and January is approximately “whenever you run out of greens and feel pathetic about it.”

Growth is slow when daylight drops under 10 hours. You’re not getting armloads of salad every week. But you are getting fresh greens from your own garden in February, which is honestly a little bit miraculous and I will not apologize for being proud of it.

I call it my slow salad. (Lettuce take the wins where we can get them.)

Seeds Are Cheap, Regret Is Expensive

Neither of these is hard to find. Most seed catalogs carry mâche, and claytonia shows up in the specialty greens section. A single packet of each is plenty for a cold frame, and both will self-sow enough that you may never need to buy claytonia again after the first year. These cold-hardy winter salads are about as low-effort and high-reward as vegetable gardening gets. Which, now that I think about it, is kind of the whole point of this garden.

A few bucks now versus three more winters of grocery store clamshells. I know which one I’m choosing. By now, you should too.

Photo by Gigi on Unsplash