Rutabaga: Spacing, Yield & Planting Dates

About rutabaga

Rutabaga is a cold-hardy root crop that improves in flavor after frost, producing dense, sweet roots excellent mashed, roasted, or added to stews.

Spacing & yield

Rutabaga wants 6×15 inches and about 0.75 lb per plant at ~90 days to maturity.

Growing tips

• Direct sow in midsummer for a fall harvest — rutabaga sweetens in cold soil.
• Thin to 6 inches apart once seedlings are established; crowded roots stay small.
• Mulch in late fall to extend the harvest window into early winter.
• Grow in loose, fertile soil free of rocks for smooth, uniform roots.

Common mistakes

• Planting in spring for summer harvest — rutabaga tastes best after fall frost.
• Failing to thin adequately, producing small, oddly shaped roots.
• Harvesting before frost, missing the conversion of starches to sugars.

Harvest & storage

Pull roots when 3-5 inches in diameter after fall frost, roughly 90 days from sowing.

Store in a root cellar at 32-40 F in damp sand for 4-6 months; wax-coated roots keep even longer.

Companion planting

Good neighbors for rutabaga: peas, onions, beans. Avoid planting beside: strawberries, tomatoes, mustard greens.

Planting calendar

Start indoors about 4 weeks before last frost. Direct sow is also an option around 3 weeks before frost. Use the seed-starting calculator above with your real county frost date — the April 15 default is only a worked example (zone 6 style).

Estimates only — consult your local extension office for advice specific to your land and animals.