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SuNutri
English Cucumbers
Intermediate

English Cucumbers

Cucumis sativus

Family: Cucurbitaceae

English cucumbers (also called European or seedless cucumbers) are long, slender cucumbers with thin, edible skin and few seeds. They're the mildest, most digestible type and don't require peeling. Often grown in greenhouses but thrive outdoors in warm climates.

Days to Harvest

55-65 days

Sun Needs

Full Sun (8+ hours)

Water Needs

high

Germination Temp

85°F optimal

Seed Starting

Start Indoors

3 weeks before last frost

Germination

3-10 days

Seed Depth

1 inch

Light to Germinate

No

đź’ˇ Tip: Start indoors for best results. Some varieties are parthenocarpic (fruit without pollination). Trellis for straight cucumbers.

Growing Conditions

Soil Type

Rich, well-draining soil with organic matter

pH Range

6 - 7

Spacing

24 inches between plants on trellis

Companion Plants
âś“ Beansâś“ Peasâś“ Cornâś“ Sunflowers

⚠️ Avoid planting near:

âś— Potatoesâś— Sageâś— Mint
History & Nutrition

History

English cucumbers represent the pinnacle of Victorian greenhouse breeding, developed in 19th-century Britain where wealthy estates competed to produce the longest, most elegant cucumbers year-round. British gardeners created elaborate glass houses with heating systems specifically for cucumber cultivation—growing cucumbers in February became a mark of horticultural prestige. The varieties bred during this era featured extremely thin, delicate skin (necessitating the modern plastic wrap), virtually no seeds, and a mild flavor that suited refined palates. These "Telegraph" or "Improved Telegraph" types became the standard for greenhouse production across Europe. Unlike field cucumbers pollinated by bees, greenhouse varieties were bred to be parthenocarpic—setting fruit without pollination—eliminating the bitter seeds that develop in fertilized cucumbers. Dutch growers further refined greenhouse cultivation in the 20th century, making the Netherlands a major exporter. The cucumbers arrived in North American supermarkets in the 1980s, always wrapped in plastic to protect their thin skin and extend shelf life. Called "English," "European," "hothouse," or "seedless" cucumbers depending on the region, they command premium prices over field cucumbers. Modern breeding has produced varieties that can grow outdoors in warm climates, though traditional greenhouse types remain the gold standard for refinement and appearance.

Nutritional Benefits

  • âś“Very high water content
  • âś“Low in calories
  • âś“Easily digestible
Climate & Temperature

Optimal Growing Temp

65°F - 80°F

English cucumbers prefer slightly cooler temps than American types. Ideal for greenhouse growing. Heat above 85°F can stress plants.

Survival Range

55°F - 90°F

Can survive these temperatures

tender
warm Season

Best USDA Zones

Zone 6Zone 7Zone 8Zone 9

Humidity

60-80%

Higher humidity than regular cucumbers—ideal for greenhouse production. Good ventilation prevents disease.

Plant Size & Growth

Height

6-10 feet (trained vertically)

Spread

2-3 feet (when trellised)

Growth Habit

vine

annualRoot Depth: Deep root system, 24-36 inches. Requires consistent moisture.
Growth Stages

Germination

5-10 days

Seeds germinate best at 80-85°F soil temperature. Cotyledons emerge first.

Seedling Stage

Duration: 2-3 weeks

True leaves: First true leaves appear 7-10 days after sprouting with large, palmate shape

Transplant ready: Ready when 4-5 inches tall with 3-4 true leaves. Handle carefully—sensitive to transplant shock.

Vegetative Growth

Duration: 3-4 weeks after transplant

Vigorous vine growth. Train single main stem upward on string or trellis.

Flowering

Timing: 4-5 weeks after transplant

Duration: Continuous throughout season

Gynoecious varieties produce mostly female flowers. Parthenocarpic types set fruit without pollination—ideal for greenhouse.

Fruit Development

Begins: 7-10 days after flower opens

Duration: Continuous until frost

Long, slender fruits develop quickly. Harvest at 12-14 inches for best quality.

Harvest Maturity

Timing: 55-65 days from seed

  • Fruits are 12-14 inches long
  • Dark green and slender
  • Firm and straight
  • Seedless interior
Expected Yield

Per Plant

15-25 large cucumbers per plant when well-managed

Per Square Foot

8-12 cucumbers per plant in greenhouse

Harvest Frequency

Every 2-3 days during production

Factors Affecting Yield

  • •Greenhouse growing significantly increases yield
  • •Consistent temperature and humidity essential
  • •Proper training and pruning optimize production
  • •Parthenocarpic varieties don't need pollinators
Watering Guide

Seedling Stage

Keep consistently moist—never let dry out

Established Plants

Consistent moisture essential—1-2 inches weekly minimum

During Fruiting

High water needs during fruiting—never let plants stress

Preferred Method

Drip irrigation ideal. Maintain consistent soil moisture. Avoid wetting foliage.

⚠️ Critical Watering Periods

  • • Flowering
  • • Fruit development
  • • Hot weather

Pro Tips

  • PRO TIP: English cucumbers have high water needs—more than regular cukes
  • Greenhouse growing allows precise moisture control
  • Mulch to maintain even soil moisture
  • Morning watering preferred
Fertilizing Guide
heavy feederRecommended: Balanced initially, then higher potassium during fruiting

Feeding Schedule

At Planting

Rich compost and balanced fertilizer

Once

Vine Growth

High nitrogen fertilizer

Every 2 weeks

Flowering

Switch to balanced 10-10-10

Every 2 weeks

Fruiting

Higher potassium (15-10-15 or similar)

Weekly

Organic Options

CompostFish emulsionKelp mealWorm castings

Apply compost tea weekly during fruiting

Container Growing
âś“ Suitable for containers

Minimum Size

10 gallons

Recommended Size

15-20 gallons for best production

Depth Required

At least 16 inches deep

Best Varieties for Containers

Telegraph ImprovedDivaSocrates

Container Tips

  • Large containers only—these are big plants
  • Must provide tall trellis or string support
  • Greenhouse or protected growing recommended
  • Excellent for indoor hydroponic systems
Support & Trellising
Support Required

Support Type

String training, single stem up vertical support

Height Needed

6-8 feet tall

When to Install

Install at planting time—continuous training required

Method

Train main vine straight up string or trellis. Remove all side shoots (suckers) for maximum fruit quality and size.

Tips

  • Single-stem training produces longest, straightest fruits
  • Remove all lateral shoots to focus energy on main vine
  • Fruits must hang freely for straight growth
  • Commercial growers use overhead string systems
✂️
Pruning Guide
Pruning Recommended

Why Prune

Train single main stemImprove air circulationMaximize fruit quality

When

Continuous throughout growing season

Technique

Remove ALL side shoots (suckers) to train single main stem. Remove lower leaves as they age.

Remove

  • âś— All side shoots/suckers
  • âś— Lower leaves as they yellow
  • âś— Misshapen fruits

Keep

  • âś“ Single main vine
  • âś“ Developing fruits
  • âś“ Upper healthy foliage
Succession Planting

Plant Every

3-4 weeks

Sowings/Season

2-3 plantings for year-round greenhouse production

Duration

Continuous in greenhouse; outdoor limited by season

Tips

  • Greenhouse allows continuous succession planting
  • Outdoor growers limited to single main planting
  • Replace older plants as production declines
Frequently Asked Questions

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