Growing Zucchini in Zone 4b

Your planting timeline

1. Start seeds indoors~3 weeks before last frost (around April 16)
2. Transplant outdoorsafter your last frost, around May 7
3. Direct sowonce soil warms, around May 7
4. Harvestabout 45–60 days from transplant

Best varieties for zone 4b

Lean on quick, compact producers such as Black Beauty, Dunja, and Raven that crop heavily before the early fall frost.

Growing notes

Zucchini drinks heavily — give it roughly 1–2 inches of water per week, and more during heat or fruiting. Water deeply at the base 2–3 times a week rather than a daily sprinkle; this encourages deep roots and steadies the plant against drought. Keep the big leaves dry by watering in the morning at soil level, since wet foliage invites powdery mildew. Inconsistent watering causes fruit to abort at the tip, end up misshapen, or develop blossom-end rot. A 2–3 inch mulch of straw or shredded leaves conserves moisture and keeps the developing squash off bare soil. Container-grown plants dry quickly and may need daily watering at peak summer.