Zone 3 · Cucumbers Growing Guide

When to Plant Slicing Cucumber
in Zone 3

Fast-growing warm-season crop. Direct sow once soil warms. Trellis to save space, improve air circulation and produce straighter fruits.

Plant outdoors
Jun 1 – Jun 15
Start indoors
May 10 – May 20
Last Frost
~May 15
Days to harvest
50–70 days
Difficulty
Easy
Wrong season — Zone 3
Harvest window: Aug – Sep

Planting Calendar

In Zone 3, Slicing Cucumber should be planted outdoors Jun 1 – Jun 15, after the average last frost date of approximately May 15. Start seeds indoors around May 10 – May 20 for a head start.

Direct sow after last frost. Fast-maturing varieties like Spacemaster or Salad Bush work best.

Care Guide

Sunlight
Full sun · 6–8 hrs/day
Watering
High
Spacing
12–18 inches
Soil
Rich, well-draining, moisture-retentive
Days to maturity
50–70 days
Soil pH
6.0–7.0
plant tip · Zone 3

Direct sow after last frost. Fast-maturing varieties like Spacemaster or Salad Bush work best.

Feeding Schedule

How often
every 2 weeks
Feed type
balanced then high potassium
Key timing
switch to high-potassium at first flower

Heavy feeder once fruiting starts. Consistent moisture and feeding prevents bitterness.

Succession Planting

Sow every 3 weeks

Sow every 3 weeks from last frost through early summer. Cucumber plants decline mid-season from disease and exhaustion — a second or third sowing keeps production going when first plants fade.

Companion Planting for Slicing Cucumber

What you plant next to slicing cucumber makes a real difference — some plants actively help, others compete or attract pests.

Grows well with
  • Beans
  • Corn
  • Peas
  • Radishes
  • Sunflowers
Keep away from
  • Aromatic herbs
  • Potatoes
  • Sage

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Common questions

In Zone 3, start slicing cucumber seeds indoors around May 10 – May 20, then transplant outdoors Jun 1 – Jun 15 after your last frost around May 15. Direct sow after last frost. Fast-maturing varieties like Spacemaster or Salad Bush work best.
Zone 3 has an average last spring frost of approximately May 15 and a first fall frost around Sep 15. These dates vary by specific location — use your ZIP code in the plant app for precision based on the nearest NOAA weather station.
Good companion crops for slicing cucumber include Beans, Corn, Peas, Radishes, Sunflowers. Avoid planting near Aromatic herbs, Potatoes, Sage, which can compete for nutrients or attract pests.
Slicing Cucumber typically takes 50–70 days from transplant or direct sow to harvest in Zone 3. Expected harvest window: Aug – Sep.

Recipes using this crop

Great ways to use your harvest — see all recipes

Preserves & Condiments

Quick Cucumber Pickles

20 min · easy

Preserves & Condiments

Proper Tzatziki

20 min · easy

Free app · iOS February 2028

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Slicing Cucumber in other zones
Crop Guides