Description

The Ruby Jewel, American Heritage and the Cabbage of Crimson Perfection

Red Acre cabbage is a ruby in the garden. It is a tight, shining head of crimson-purple leaves that looks almost lacquered when the light hits it.

It grows with the quiet confidence of a variety bred to be dependable: sturdy plants, steady growth, and a head that forms cleanly and firmly, as if it knows exactly what it came here to do. In late summer and fall, when the days begin to shorten and the air turns crisp, Red Acre feels like a jewel you can harvest. It’s dense, perfectly wrapped, and richly coloured all the way through. Slice it, and the colour deepens into wine and violet. Cook it, and it turns silky and sweet. Keep it raw, and it stays bright and crunchy, bringing beauty and bite to slaws and salads.

This is a cabbage for gardeners who want both visual magnificence and real productivity, a classic red cabbage that delivers uniform heads, reliable performance, and flavour that leans sweet and tender, especially after cool weather.

A whisper of history

Heading cabbage was refined in Northern Europe, where gardeners selected wild cabbage relatives for tight, compact heads that could feed families and store through winter.

Red cabbage emerged as a beloved form in Central and Northern Europe, prized for its colour and keeping quality. Red Acre is an achievement: selected in the early-to-mid 20th century for uniform, compact heads, reliable yields, and excellent flavour, and it has earned its place in gardens across the U.S. and Canada.

What You’ll Grow

• Plant type: Cool-season annual brassica (heading cabbage)
• Growth habit: Compact plant forming one dense head
• Plant height: typically 30 to 45 cm (12 to 18 in)
• Spread: typically 30 to 45 cm (12 to 18 in)
• Head size: typically 13 to 18 cm (5 to 7 in) across (compact and dense)
• Colour: deep crimson-red to purple
• Texture: crisp when raw; tender and silky when cooked
• Flavour: sweet, clean cabbage flavour; mellows and sweetens in cool weather

Days to maturity: typically 70 to 90 days from transplant to harvest.

Growing Instructions

Red cabbage is a cool-season crop that thrives with steady moisture, rich soil, and consistent growth.

When to Plant

• Start 6 to 8 weeks before the last spring frost indoors
• Transplant outdoors after the last spring frost once seedlings are sturdy
• In many Canadian gardens, a mid-summer sowing for fall harvest can also work well (timing depends on your first frost)

Starting From Seed (Indoors)

• Sow 6 to mm (1/4 to 1/2 in) deep
• Keep evenly moist
• Germination: typically 7 to 14 days
• Provide strong light; keep seedlings cool to prevent stretching

Hardening Off

• Harden off seedlings for 7 to 10 days before transplanting

Planting + Spacing

• Full sun is best (6 to 8+ hours)
• Space plants 30 to 45 cm (1218 in) apart
• Rows: 60 to 75 cm (24 to 30 in) apart
• Plant into fertile, well-drained soil; firm in well and water deeply

Soil + Feeding

Cabbage is a heavy feeder, especially for head formation.

• Target pH 6.0 to 7.0
• Work in compost or well-rotted manure before planting
• Side-dress with compost or a balanced fertilizer during the season
• Avoid growth stalls (stalls can lead to smaller heads or splitting later)

Watering

• Provide 2.5 to 5 cm (1 to 2 in) of water per week
• Keep moisture consistent for sweet, tender heads
• Mulch to conserve moisture and moderate soil temperature

Pest Notes (Brassica Reality)

• Watch for cabbage worms, flea beetles, and aphids
• Row cover early helps prevent egg-laying
• Hand-pick caterpillars; rinse aphids off with water; treat as needed with approved organic methods

Common Issues + Prevention

• Splitting: caused by uneven watering after heads are nearly mature. Keep watering steadily; harvest promptly when firm.
• Loose heads: often from heat stress or low fertility. Keep plants growing steadily and feed well.

Harvesting (When the Jewel Is Firm)

• Harvest when heads are firm, dense, and well-coloured
• Typical size: 13 to 18 cm (5 to 7 in)
• Cut with a sharp knife, leaving a few wrapper leaves for protection
• In some cases, leaving the stump may encourage small secondary heads (not guaranteed)

Cold Improves Flavour

• Red cabbage becomes sweeter after cool weather; flavour is best in fall

Preserving + Storage

Red Acre is valued for its keeping quality.

• Short-term: store in the fridge
• Long-term: store whole heads in a cool, humid place (root cellar conditions) for weeks to months
• Ferment: shred for sauerkraut-style ferments (colour turns stunning)
• Pickle: quick-pickled red cabbage is bright, crunchy, and long-lasting

Culinary Notes: Colour You Can Taste

Red Acre shines both raw and cooked.

• Slaws + salads: crisp, colourful, and sweet
• Braised: classic with vinegar, apples, spices, or a touch of sweetness
• Roasted wedges: caramelized edges, tender centers
• Stir-fries: quick, bright, and slightly sweet
• Pickled: tangy, jewel-toned condiment for sandwiches and bowls

Prep Tip

• Acid (vinegar/lemon) keeps the colour vibrant
• Longer cooking mellows flavour and softens texture into silk

Canadian Climate Notes

Red Acre is a strong choice for Canadian gardens because it prefers cool weather and reliably forms dense heads.

• Start early enough to avoid peak heat during head formation
• Fall-grown heads often have the best colour and sweetest flavour
• Protect from early hard frosts if heads are still sizing (row cover helps)

Growing zones: 2 to 10 (annual; cool-season crop).

Seed Saving (Your Only Guide)

Cabbage is typically grown as a biennial for seed.

How to Save Seed

1. Select your best plants (firm, uniform heads; intense colour; best flavour)
2. Overwinter plants where possible (or store heads/roots cool and humid, then replant in spring)
3. In the following season, allow plants to bolt and flower (yellow blooms)
4. Let the seed pods mature and dry on the plant until brown
5. Harvest pods, finish drying indoors, then thresh to release the seed
6. Store seed cool, dark, and dry

Isolation & Cross-Pollination

• Cabbage crosses with other Brassica oleracea types (kale, broccoli, cauliflower, Brussels sprouts, collards, other cabbages)
• For pure seed, isolate by distance (as practical) or only let one B. oleracea type flower

Seed viability: typically 4 to 5 years

Red Acre is crimson reliability, a compact, beautiful head that earns its place in the garden with colour, flavour, and the steady satisfaction of a harvest that feels like a jewel in your hands.