SuNutri
SuNutri
Orange Cauliflower
Intermediate

Orange Cauliflower

Brassica oleracea var. botrytis

Family: Brassicaceae

Orange cauliflower has vivid orange heads due to naturally occurring beta-carotene—the same compound in carrots. It contains significantly more Vitamin A than white cauliflower and has a slightly sweeter flavor.

Days to Harvest

60-80 days

Sun Needs

Full Sun (6+ hours)

Water Needs

high

Germination Temp

70°F optimal

Seed Starting

Start Indoors

6 weeks before last frost

Germination

4-10 days

Seed Depth

1/4 to 1/2 inch

Light to Germinate

No

💡 Tip: Same care as white cauliflower. Orange color intensifies with cool temperatures.

Growing Conditions

Soil Type

Rich, well-draining soil

pH Range

6.5 - 7.5

Spacing

18-24 inches between plants

Companion Plants
BeansCeleryOnions

⚠️ Avoid planting near:

StrawberriesTomatoes
History & Nutrition

History

Orange cauliflower's origin story reads like botanical serendipity—a chance natural mutation discovered in a Canadian cauliflower field near Guelph, Ontario, in 1970. A single plant among thousands displayed vivid orange curds instead of the typical white, the result of a genetic mutation that allowed beta-carotene to accumulate in the florets rather than being blocked as in normal cauliflower. Plant breeders at Cornell University spent nearly two decades developing the mutation into a stable, commercially viable variety, finally releasing it in 1991 under the name "Cheddar" for its cheese-like golden hue. Unlike artificially colored vegetables, orange cauliflower's color is entirely natural and comes with significant nutritional benefits—containing up to 25 times more beta-carotene than white varieties. The color intensifies when the plants experience cool temperatures during head formation, creating deeper orange tones in fall-grown specimens. Initially marketed as a novelty, orange cauliflower gained serious traction as consumer interest in nutrient-dense foods grew. Today it represents one of the most successful natural vegetable color variants, joining purple and green cauliflower in offering gardeners and cooks visually stunning alternatives to traditional white. Its mild, slightly sweeter flavor has won over skeptics who assumed the color change might affect taste.

Nutritional Benefits

  • 25 times more beta-carotene than white cauliflower
  • High in Vitamin A
  • Excellent source of Vitamin C
Climate & Temperature

Optimal Growing Temp

60°F - 70°F

Orange cauliflower has similar requirements to white cauliflower, thriving between 60-70°F. Cool temperatures produce the best color and tightest curds.

Survival Range

40°F - 80°F

Can survive these temperatures

hardy
cool Season

Frost Note: Tolerates light frosts down to 25°F. Like other cauliflowers, protect curds from hard freezes. The orange color intensifies with cool temperatures.

Best USDA Zones

Zone 4Zone 5Zone 6Zone 7Zone 8

Humidity

50-70%

Moderate humidity is best. Ensure good air circulation around curds to prevent disease.

Plant Size & Growth

Height

18-24 inches

Spread

18-24 inches

Growth Habit

upright

biennialRoot Depth: Similar to white cauliflower, with moderate root system in top 12-18 inches.
Growth Stages

Germination

4-10 days

Germination similar to white cauliflower.

Seedling Stage

Duration: 4-6 weeks

True leaves: First true leaves similar to other cauliflower types

Transplant ready: Ready when 4-5 inches tall with 4-6 true leaves.

Vegetative Growth

Duration: 4-6 weeks after transplant

Standard cauliflower vegetative growth, building leaf canopy to support curd formation.

Flowering

Timing: 8-12 weeks after transplant

Duration: Curd forms over 10-14 days, revealing orange color as it develops

Curds are immature flower buds. The orange color becomes more intense as curds mature.

Harvest Maturity

Timing: 60-80 days from transplant

  • Bright orange color is fully developed
  • Curd is firm and tight
  • Head reaches 6-8 inches diameter
  • No yellowing or separation of florets
Expected Yield

Per Plant

1.5-2.5 lbs per head

Per Square Foot

1-1.5 lbs per square foot

Harvest Frequency

One head per plant

Factors Affecting Yield

  • Cool temperatures develop best orange color
  • Similar growing requirements to white cauliflower
  • No blanching needed—color intensifies with light exposure
  • Consistent moisture prevents buttoning
Watering Guide

Seedling Stage

Keep consistently moist

Established Plants

1-1.5 inches per week

During Fruiting

Critical moisture during curd formation

Preferred Method

Drip irrigation at soil level, same as white cauliflower.

⚠️ Critical Watering Periods

  • Curd formation

Pro Tips

  • Water needs identical to white cauliflower
  • Consistent moisture critical
Fertilizing Guide
heavy feederRecommended: Same as white cauliflower: high nitrogen early, balanced later

Feeding Schedule

At Transplanting

Balanced with compost

Once

Vegetative Growth

High nitrogen

Every 2-3 weeks

Curd Formation

Balanced

Every 3 weeks

Organic Options

CompostFish emulsionBlood mealKelp meal

Same as white cauliflower. Ensure adequate boron.

Container Growing
✓ Suitable for containers

Minimum Size

5 gallon minimum

Recommended Size

10-15 gallon

Depth Required

At least 12 inches deep

Best Varieties for Containers

CheddarOrange Bouquet

Container Tips

  • Same container requirements as white cauliflower
  • The orange color makes a stunning container display
  • Fall planting is most reliable
  • Cheddar variety is the most common orange type
✂️
Pruning Guide
Pruning Optional

Why Prune

No blanching needed—unlike white cauliflower

When

N/A

How Often

N/A

Technique

Orange cauliflower does not need blanching—the color is natural and stable.

Remove

  • Only damaged leaves

Keep

  • All healthy foliage
Succession Planting

Plant Every

2-3 weeks

Sowings/Season

2-3 plantings

Duration

Spring and fall

Tips

  • Same succession strategy as white cauliflower
  • Fall crops typically produce best color
Frequently Asked Questions

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