Cucumber

Growing Cucumber in Zone 5a

A complete, zone-5a timeline for Cucumber — when to start, transplant, and harvest, tuned to this zone's typical frost dates (Denver, Chicago, Cleveland).

May 10Last spring frost
September 30First fall frost
about 143 daysGrowing season
−20 to −10°FWinter low

Your planting timeline

  1. Start seeds indoors~3 weeks before last frost (around April 19)
  2. Transplant outdoorsafter your last frost, around May 10
  3. Direct sowonce soil warms, around May 10
  4. Harvestabout 50–70 days from transplant

Best varieties for zone 5a

Dependable early-to-midseason picks like Marketmore 76, Straight Eight, and Salad Bush ripen comfortably within the season.

Growing notes

Cucumbers are mostly water and they drink hard — aim for a steady 1–2 inches per week, and more during heat or fruiting. Water deeply at the base 2–3 times a week rather than a daily sprinkle; this drives roots down and steadies the plant against dry spells. Keep the foliage dry and water in the morning to discourage powdery and downy mildew. Consistency is everything: erratic wet-then-dry swings turn cucumbers bitter, misshapen, and hollow. A 2–3 inch straw or shredded-leaf mulch conserves moisture and keeps soil temperatures even. Containers dry out fast and may need daily watering at the peak of summer.

Recommended supplies

Affiliate links — we may earn a small commission at no cost to you.