We are excited that our winter salad mix season has started! During the summer we have heads of lettuce and the warm weather salad crops like tomatoes and cucumbers. But now we've had a couple of frosts and we are starting to harvest many types of salad greens, mostly from our hoophouse. You could use cold-frames or thick row-cover on hoops outdoors for growing salad greens in suitable climates. Winter salad mix is also known as mesclun or spring mix (even though we are growing it in the winter).
Our harvesting includes cutting the outer leaves of various crops into ribbons, snipping small individual leaves from other crops and mixing the ingredients. Our general salad mix harvesting approach is to mix colors, textures and crop families. I like to balance green and red lettuce of different kinds with chenopods (spinach, baby chard, Bull's Blood beet leaves) and brassicas (brassica salad mix, baby tatsoi, thinnings of direct-sown brassicas, chopped young leaves of Tokyo bekana, Maruba Santoh or other Asian greens, mizuna, other frilly mustards such as Ruby Streaks, Golden Frills and Scarlet Frills). In October and early November we harvest the last of our outdoor lettuce and mix that in. Later we use lettuce grown in the hoophouse.
Ruby Streaks and mizuna. Photo by Kathleen Slattery
Brassica salad mixes (also called mustard mixes) are easy to grow. There are various mixes you can buy, to complement your baby lettuce mix. It doesn't work well to mix lettuce seed and brassica seed together when sowing, as the crops grow at different rates. It is better to grow separate patches and customize your mix when you harvest. Wild Garden Seed has Wild Garden Pungent Mix, and the mild Pink Petiole Mix. Some seed companies now sell individual crops for mixes (see Johnnys Selected Seeds or Fedco Seeds Asian Greens for example). We mix our own Brassica Salad Mix from leftover random brassica seeds. For a single cut, almost all brassicas are suitable, except very bristly-leaved turnips or radishes. Here in central Virginia, we sow between early October and mid-November for winter harvest, and from early December to mid-February for March and early April harvests. Even if you don't plan to grow brassica salad mix, keep it in mind as a worthwhile backup plan if other crops fail, or outdoor conditions are dreadful and you need a quick crop to fill out what you have.
I prefer to harvest and chop as I go, mixing everything at the end. It might seem easier to harvest first and then cut and mix, but that requires handling the greens a second time which causes more damage. Incidentally, tearing damages more than cutting, so just get a good pair of scissors and keep them sharp. I cut and gather until I have a handful of leaves, then roll them lengthwise and cut into ribbons. The width of the ribbon depends on the crop. I like to have different size shreds. Mild flavor and plentiful items I cut on the wider side, stronger flavors narrower. I also want every bowlful to get some red highlights (no mere mixed green salad), so if red leaves are in short supply that day, I cut those thin.
Bull's Blood beets growing in our hoophouse. Photo by Bridget Aleshire
To harvest baby lettuce mix or brassica salad mix use scissors, shears or a serrated knife, and cut an inch (a few centimeters) above the soil to spare the growing point of the plants for regrowth. Some growers use a leaf rake to pull out debris after each harvest of baby leaf lettuce, and minimize the chance of including bits of old rotting leaves in the next cut. For small plants, it works fine to pinch off individual leaves, provided you are careful not to tug--small plants may not be very firmly anchored in the soil! Small leaves can go in the mix whole.
Baby lettuce mix can be cut 21 days from seeding in warm weather, but from November to mid-February, it may take two or three times as long from sowing to first harvest. Cool season lettuce mix may provide four or more cuttings, but in warm weather it will only provide a single harvest. Excessive milkiness from the cut stems is a sign of bitterness. You can also test by nibbling a piece of leaf. Our winter salad mixes end at the end of April, when our outdoor lettuce heads are ready for harvest.
Pam Dawling works in the vegetable gardens at Twin Oaks Community in central Virginia. She often presents workshops at MEN Fairs. Pam also writes for Growing for Market magazine. Her book, Sustainable Market Farming: Intensive Vegetable Production on a Few Acres, is available at www.sustainablemarketfarming.com, Pam's blog is on her website and also on facebook.com/SustainableMarketFarming.
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