Growing Mustard Greens: A Complete Profile

By Growing Home Greens Team · July 18, 2026

Mustard greens are one of the fastest crops you can grow for a full harvest, direct-sown and ready to cut in under six weeks, with a peppery bite that gets sharper the longer a leaf sits on the plant. They’re also one of the most cold-tolerant greens, holding up to frost that would finish off lettuce.

Sowing it into cold soil it doesn’t mind

Direct-sow mustard greens roughly three weeks before your last frost. They don’t mind the cold and germinate fine in cool soil. At 40 days to maturity and 4 plants per square foot, this is a dense, quick-turnover crop: expect to be harvesting outer leaves within a month and cycling the bed to something else well before summer heat sets in.

Bolting is a timing problem, not a growing one

Like most quick brassica greens, mustard bolts and turns bitter once heat arrives, so timing matters more than troubleshooting once it’s planted. Harvest outer leaves continuously rather than waiting for the whole plant to size up. This keeps the plant producing and the flavor from getting too intense on any single leaf.

A fast-turnover filler for a salad bed

Mustard greens share light and water needs with lettuce, making them a natural fit for a shared salad bed, and they pair well with carrots for mutual pest benefit. See the full companion guide for mustard-greens. At 4 per square foot, they’re an efficient, fast-turnover filler in the Garden Designer, useful for using up bed space before or after a slower main crop.

Companion planting guide for Mustard Greens · Find your planting dates

Typically viable in USDA zones 2-11. Not sure your zone? Look it up by ZIP code.

Method: Direct sow: Direct-sow outside. Mustard Greens doesn't transplant well, or doesn't need the extra time indoors.

See exact start-indoors, direct-sow, and harvest dates for your zone →

How many Mustard Greens plants fit per square foot?

Spacing: 4 per square foot (square-foot-gardening spacing). Mature height: 1-2 ft.

Varieties worth considering

• Southern Giant Curled: Listed by University of Florida IFAS Gardening Solutions as one of the mustard cultivars recommended for Florida gardens, alongside Florida Broad Leaf, Tendergreen, Giant Red, Green Wave, and Mizuna. (source)
• Ruby Streaks: Fine, deeply lobed dark green and maroon leaves, ready in 21 days as baby leaf or 40 for full size, per Johnny's. Milder than Southern Giant Curled, worth growing if you want a mustard green for a salad mix rather than a cooked side dish. (source)
• Red Giant: A broadleaf type with purple-tinted, gently scalloped leaves, very slow to bolt per Johnny's, which matters more than flavor once summer heat arrives and the fast-bolting types are already finished. (source)

Cited from the source shown next to each variety. We haven't grown these ourselves yet, so treat this as a research-backed starting point, not a personal endorsement.

Where to buy mustard greens seeds

• Botanical Interests
• True Leaf Market
• Burpee
• High Mowing Organic Seeds

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See it growing

Search YouTube for "growing mustard greens" videos → (a live search, not a hand-picked video; results vary and aren't vetted by us)

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Growing Mustard Greens: A pungent, fast, cold-hardy salad green ready to cut in under six weeks, with variety picks for baby leaf versus a cooked side dish.

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