How to Grow Suyo Long Cucumber

Wikimedia Commons

Suyo Long Cucumber

Cucumis sativus 'Suyo Long'

vegetable

Suyo Long is an Asian cucumber variety known for its long, slender fruits (10-14 inches) with thin, bumpy skin and mild, crisp flesh. It produces prolific yields and is ideal for fresh eating, salads, and pickling. This Japanese heirloom variety thrives in warm conditions and produces continuously throughout the growing season.

When should you plant Suyo Long Cucumber in your zone?

Get a personalized planting timeline — when to start seeds, transplant, and harvest — based on your USDA zone and local frost dates. Free to start.

Get my Suyo Long Cucumber timeline →

Example Suyo Long Cucumber timeline · Pittsburgh, PA (Zone 6b)

Plant Suyo Long Cucumber
Around Apr 17

Near Pittsburgh's average last spring frost.
Tend & protect
Late spring–summer

Watering, feeding, and pest-watch reminders.
Harvest Suyo Long Cucumber
Around Jun 6

≈ 50 days after planting

Sample dates for Pittsburgh, PA. Sign up to get exact Suyo Long Cucumber dates for your own zip code.

Growing Conditions

☀️

Sun: Full sun, 6-8 hours daily minimum

💧

Water: Keep consistently moist but not waterlogged; water 1-2 inches per week. Water at soil level in early morning to reduce disease. Increase frequency during hot, dry periods. Mulch to retain moisture and regulate temperature.

📏

Spacing: 12 inches

📅

Days to maturity: 50-70 days from planting to first harvest

🌱

Planting depth: 1 inch deep; direct seed after last frost when soil reaches 60°F or higher

Soil

Type: Well-draining loamy soil rich in organic matter

pH: 6.0-7.0

Amendments:

Compost Aged manure Peat moss or coconut coir Balanced fertilizer (10-10-10)

Growing Zones

Find your zone →

Thrives in zones 4-10; grows best in warm zones 6-9

3a 3b 4a 4b 5a 5b 6a 6b 7a 7b 8a 8b 9a 9b 10a

Get my Suyo Long Cucumber timeline →

Growth Stages

Germination & Seedling

7-14 days

Seeds sprout within 5-10 days; cotyledons emerge followed by true leaves

Keep soil warm (70-85°F) and consistently moist. Provide bright light if starting indoors. Thin seedlings to strongest plant per hill. Harden off transplants over 7-10 days before moving outdoors.

Vegetative Growth

2-3 weeks

Vigorous vine development with climbing or sprawling growth habit; large green leaves emerge along lengthening stems

Provide trellising or support structure early. Train vines upward to improve air circulation and reduce disease. Water deeply and regularly. Apply balanced fertilizer every 2-3 weeks. Pinch growing tips if desired to encourage branching.

Flowering

1-2 weeks

Small yellow flowers appear at leaf axils; male flowers appear first, followed by female flowers with tiny immature fruit behind the bloom

Ensure consistent watering during flowering. Pollination is aided by bees; avoid insecticides during bloom. Continue fertilizing with higher potassium formula (e.g., 5-10-10) to support fruit production. Remove any damaged foliage.

Fruit Development & Expansion

2-3 weeks

Fruits rapidly elongate and thicken; characteristic long, slender shape with bumpy skin develops. Fruits reach 10-14 inches at maturity

Maintain consistent soil moisture to prevent bitter, misshapen fruits. Fertilize every 10-14 days with lower nitrogen formula. Monitor for pests and diseases. Harvest immature fruits (8-10 inches) to encourage continued production. Ensure adequate air circulation around vines.

Peak Production & Harvest

4-6 weeks

Plant produces continuous succession of mature fruits if harvested regularly; old vines may slow production in extreme heat or cool conditions

Pick fruits every 2-3 days while tender and slightly immature for best flavor and texture. Regular harvesting stimulates new flower and fruit production. Continue watering and feeding. Remove diseased leaves promptly. Provide afternoon shade in zones 9+ during peak summer heat.

Companion Planting

Plan your garden →

Plant with:

Basil Beans Corn Dill Marigolds Nasturtiums Oregano Peas Radishes Squash

Avoid planting near:

Aromatic herbs (fennel, sage) Brassicas (cabbage, broccoli) Fennel Potatoes Rosemary

Common Pests

Row covers until flowering; yellow sticky traps; hand-pick; insecticidal soap or neem oil; encourage natural predators like ladybugs
Ensure good air circulation; water at soil level; sulfur dust or potassium bicarbonate spray; remove infected leaves; plant resistant varieties
Provide excellent drainage and air flow; avoid overhead watering; copper fungicide; remove affected leaves; grow in well-ventilated location
Increase humidity; spray with water to dislodge; neem oil; insecticidal soap; encourage predatory mites
Wrap stem bases with aluminum foil; inject Bt (Bacillus thuringiensis) into stems; remove infested vines; crop rotation; mulch heavily
Strong water spray; reflective mulch; yellow sticky traps; ladybugs and lacewings; neem oil; insecticidal soap

Uses

🍳

Fresh Salads & Slicing

Culinary

Suyo Long's tender, crisp flesh and thin skin make it ideal for fresh eating in salads, Asian dishes, and side dishes. The mild flavor pairs well with vinaigrettes and Asian dressings without requiring peeling. [source]

🍳

Pickling & Preserves

Culinary

The long, slender shape and firm texture make Suyo Long excellent for pickling, creating attractive half-length pickles or spears that retain crispness through fermentation or vinegar pickling. [source]

🍳

Asian Cuisine

Culinary

As a Japanese heirloom variety, Suyo Long is traditional in Asian cooking, used fresh in stir-fries, cold noodle dishes, and sushi preparations. Its tender nature suits quick-cooking methods. [source]

🏠

Skin Care & Cosmetics

Household

Fresh cucumber slices are traditionally used for facial treatments and eye care due to their high water content and skin-soothing properties, reducing puffiness and irritation. [source]

🦋

Pollinator Support

Wildlife

Cucumber flowers attract and support bees and other important pollinators, making Suyo Long plantings beneficial for overall garden ecosystem health and pollination of neighboring crops. [source]

Harvest Tips

Harvest when fruits are 8-12 inches long and still tender for best texture and flavor; do not wait until fruits turn yellow or overly mature. Pick every 2-3 days to encourage continuous production. Use a sharp knife or pruner to cut from vine rather than pulling to avoid damaging plant. Early morning harvest yields the crispest fruit. Suyo Long tastes best when harvested young and tender.

Fun Facts

🌱 Suyo Long is a Japanese heirloom variety that translates to 'long slender' cucumber, prized in Asia for over 50 years and now popular worldwide for its prolific production and superior quality.
🌱 Unlike many cucumber varieties, Suyo Long remains mild and crisp with thin, tender skin that doesn't require peeling, making it a favorite for fresh eating and Asian cuisine.
🌱 The plant can produce 20-30+ mature fruits per vine over a single season if harvested regularly, making it one of the most productive cucumber varieties for home gardeners.

Gardening Terms

New to gardening? Learn about terms used in this guide:

Full Sun Heirloom Mulch Pollination Transplant Trellis True Leaves

Shop Suyo Long Cucumber plants and related plants at Plant Addicts →

Join 30,000 gardeners planning their gardens with LizPlants.

Get your personalized Suyo Long Cucumber planting timeline

Tell us your zip code and we'll calculate exactly when to start Suyo Long Cucumber seeds, transplant seedlings, and harvest — based on your USDA zone and local frost dates. Includes calendar reminders and printable task lists. Free to start.

Get my Suyo Long Cucumber timeline →