When to Direct-Sow Turnips for Roots and Greens

Quick answer

Turnips are direct-sown for edible roots and greens. A conservative spring planning range is about 4–2 weeks before the last spring freeze reference; for a fall root crop, begin about 10–8 weeks before the first fall freeze reference. Then check the cultivar’s maturity period, current forecast, soil temperature, and seedbed moisture. Use the planting calendar to turn the freeze references into local planning dates.

Planting methods

Direct sowing avoids disturbing the developing root. In spring, treat the frost-relative range as an earliest planning check: sow only when the soil is workable and local bed conditions support prompt emergence rather than using a USDA Hardiness Zone as a planting date. For fall, keep the shallow seedbed evenly moist during warm weather. Thinnings can be harvested as greens.

Spacing, depth, and maturity

Sow about 1/2 inch deep. Thin plants to roughly 2–4 inches apart for roots; a seed packet may specify a different spacing for a named variety or a greens-only harvest. Source guidance places typical fall maturity around 50–60 days, but usable greens can be harvested earlier and roots should be checked at the cultivar’s intended size.

Worked local-calendar example

With an April 19 last spring freeze reference, a 4–2 week range falls from late March into early April. With an October 23 first fall freeze reference, an 8–10 week range falls from mid-August into late August. These are planning examples, not fixed planting dates or a promise that one sowing will produce both ideal roots and repeated greens.

Common mistakes

• Leaving crowded seedlings when usable roots are the goal.
• Letting a shallow midsummer seedbed dry during emergence.
• Allowing roots to become oversized, tough, or woody before harvest.

Limitations

Heat, moisture, soil texture, root pests, cultivar, and the choice between roots and greens affect the result. USDA Zones describe winter extremes, NOAA freeze normals are not forecasts, and neither replaces current soil temperature, the short-range forecast, or local bed conditions.