Growing Zucchini in Zone 3b

Your planting timeline

1. Start seeds indoors~3 weeks before last frost (around April 26)
2. Transplant outdoorsafter your last frost, around May 17
3. Direct sowonce soil warms, around May 17
4. Harvestabout 45–60 days from transplant

Best varieties for zone 3b

Choose the fastest bush varieties like Raven, Spineless Beauty, and Black Beauty that produce in 45–50 days within the brief, cool summer.

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.