📍 Minneapolis, MN · Zone 5a · Last frost Sunday, May 10, 2026
✏️ ChangeWhen to Plant Cucumber in Minneapolis, Minnesota (55439)
Location
Minneapolis, Minnesota
ZIP Code
55439
USDA Zone
5a
Last Frost
Sunday, May 10, 2026
📅 Your 2026 Planting Dates
Direct Sow Outdoors
Sunday, March 29, 2026
Based on last frost Sunday, May 10, 2026 · Zone 5a
Pro tip: Sow Cucumber directly outdoors 6 weeks before your last frost date.
🌿 Plant Details
☀️ Growing Requirements
☀️
Sun
Full Sun (6-8 hours)
💧
Water
High (consistent moisture)
↔️
Spacing
36" apart
🌱
Planting Depth
1" deep
Seeds typically germinate in 3-10 days
Ready to Plant Cucumber in Minneapolis?
Get your seeds now so they're ready by Sunday, March 29, 2026.
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⚠️ Avoid Planting Near
🛠️ Supplies You'll Need
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Common Cucumber Varieties
Popular cultivars to look for at your local nursery or seed supplier.
Straight Eight
Classic slicing cucumber with smooth, straight fruits 8 inches long; an American garden staple.
Marketmore 76
Dark green, disease-resistant slicer; one of the most widely grown home garden cucumbers.
Persian Mini
Thin-skinned, seedless 4–6 inch cucumbers with crisp texture — no peeling needed.
Lemon
Round, yellow-skinned heirloom with mild, sweet flavor and crisp texture; great for salads.
National Pickling
Short, blocky fruits with thin skin, bred for brining and pickle making.
English Telegraph
Long, seedless greenhouse-type cucumber with delicate skin and mild flavor.
Common Cucumber Problems
What to watch for — and how to fix it before it spreads.
Pests
Striped or spotted yellow-green beetles that eat seedlings and spread bacterial wilt disease.
Use row covers until flowering; plant resistant varieties; apply kaolin clay.
Cluster on undersides of leaves, causing stunting, yellowing, and sticky honeydew.
Spray insecticidal soap; encourage ladybugs and lacewings by planting flowers nearby.
Thrive in hot, dry conditions; cause stippled yellow leaves and fine webbing on undersides.
Keep plants well-watered; spray neem oil; avoid dusty conditions in the garden.
Larvae tunnel into the base of vines, causing sudden wilting and vine death.
Wrap stem base with foil; plant after peak moth flight (mid-July in many zones).
Diseases
White powdery coating on leaves, most common in warm days/cool nights — reduces yield late season.
Improve air circulation; plant resistant varieties; apply baking soda or potassium bicarbonate spray.
Spread by cucumber beetles; plants wilt suddenly and die. Confirm with the "stringy thread" test: cut a stem, touch both ends together, then pull apart slowly.
Control cucumber beetles aggressively; remove and destroy infected plants immediately.
Yellow angular patches on leaf tops with gray-purple mold on undersides; spreads rapidly in wet weather.
Water at soil level; space plants well; apply copper fungicide preventively in humid climates.
Common Mistakes
Yellow, overripe cucumbers signal the plant to stop producing — harvest cues the plant to make more.
Pick slicers at 6–8 inches, picklers at 2–4 inches; check plants every 1–2 days.
Cucumbers are heat-loving; cold soil stalls germination and invites rot.
Direct sow only when soil is 65°F+; use black plastic mulch to warm soil in cool climates.
Female flowers drop without setting fruit when pollinators are scarce.
Plant flowers nearby; hand-pollinate by transferring pollen with a small brush if bees are absent.
🌾 Seed Saving Guide
🟡 ModerateWhen to Harvest Seed
Leave a cucumber on the vine well past edible stage until it turns yellow or orange and starts to shrivel.
Processing
Scoop seeds into water, ferment 3 days, rinse, spread on screen to dry for 2 weeks.
Seed Viability
Up to 5 years when stored cool, dark, and dry.
Pro Tip
Cucumbers cross freely between varieties. Isolate by 500 feet or hand-pollinate and bag flowers to keep varieties pure.
Raised Bed Planting Guides
A 4×8 bed fits 3 plants of Cucumber. See plant counts, spacing grids, and companion pairings for every bed size →
Frequently Asked Questions
When should I plant Cucumber in Minneapolis, Minnesota? +
In Minneapolis (Zone 5a), direct sow Cucumber outdoors around Sunday, March 29, 2026.
What is the last frost date for Minneapolis, Minnesota? +
The average last spring frost date for Minneapolis, Minnesota (ZIP 55439) is around Sunday, May 10, 2026. This is based on NOAA climate normals for USDA Zone 5a.
How long does Cucumber take to grow? +
Cucumber typically matures in about 55 days from direct sowing. In Minneapolis, that means you can expect harvest around Sunday, March 29, 2026 plus 55 days.
Should I start Cucumber indoors or direct sow in Minnesota? +
Cucumber does best when direct sown outdoors. In Minneapolis, sow directly around Sunday, March 29, 2026.
📚 More Cucumber Planting Guides
Other Plants for Minneapolis
Growing Cucumber in Zone 5a
Cucumber (Cucumis sativus) is a popular garden vegetable. In Minneapolis, Minnesota, which is in USDA Hardiness Zone 5a, you should direct sow seeds around Sunday, March 29, 2026.
Your average last frost date is Sunday, May 10, 2026. Cucumber grows well when direct sown, as it doesn't transplant well or germinates quickly outdoors.