Cucumber

Growing Cucumber in Zone 6a

A complete, zone-6a timeline for Cucumber — when to start, transplant, and harvest, tuned to this zone's typical frost dates (St. Louis, Cincinnati, Boston).

April 26Last spring frost
October 12First fall frost
about 169 daysGrowing season
−10 to 0°FWinter low

Your planting timeline

  1. Start seeds indoors~3 weeks before last frost (around April 5)
  2. Transplant outdoorsafter your last frost, around April 26
  3. Direct sowonce soil warms, around April 26
  4. Harvestabout 50–70 days from transplant

Best varieties for zone 6a

A wide range works — pair an early like Marketmore 76 with productive slicers such as Straight Eight and burpless types like Sweet Success.

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.