When to Plant Zucchini
Published: April 21, 2026
The most productive plant per square foot in most gardens — two zucchini plants often produce more than a family can eat. Plant after the soil is genuinely warm to avoid disease and stunting.
When to plant zucchini
- Start seeds indoors: 3 weeks before last frost
- Direct sow outdoors: 1 week after last frost
- Minimum soil temperature: 65°F
- Days to harvest: 45–55 days
- Sun requirement: Full sun
- Spacing: 36 inches apart
- Water: 2 inches per week
- Fall crop: Yes — plant 8 weeks before first fall frost
Growing Tips for Zucchini
- •Start with just 1–2 plants — zucchini are so productive that more is rarely needed.
- •Harvest at 6–8 inches for peak flavor; zucchini left on the plant signals it to stop producing.
- •Plant a backup crop in early July to replace any vine borer losses in the eastern US.
- •Hand-pollinate male-to-female flowers with a paintbrush if small zucchini are yellowing and dropping.
Companion Planting for Zucchini
✅ Plant zucchini with
- • Corn
- • Bush Beans
- • Nasturtium
- • Marigold
- • Dill
❌ Avoid planting near
- • Potato
- • Fennel
Common Zucchini Pests and Problems
Regional pest pressure varies — see your state guide below for state-specific pest calendars and treatment timing.
Zucchini Planting Dates by State
Select your state for exact sow and transplant dates based on local frost calendars.
Frequently Asked Questions
When do I plant zucchini?
Plant zucchini 1 week after your last frost date, once soil is above 65°F. This is typically mid-May in Zones 5–6 and late April in Zones 7–8. Zucchini planted in cold soil is highly susceptible to disease and rots rather than thriving.
How many zucchini plants do I need?
One to two plants is plenty for most families. A healthy zucchini plant at peak production can produce a harvestable fruit every day. Three or more plants is a recipe for overwhelm — zucchini are notorious for producing more than gardeners can use.
Why is my zucchini not producing?
Small zucchini yellowing and dropping off means the female flower was not pollinated. Zucchini need bees to transfer pollen from male flowers (thin stem, no swelling at base) to female flowers (tiny zucchini at base). Hand-pollinate using a small brush if bees are absent.
How do I deal with squash vine borer?
Squash vine borer moths lay eggs at the stem base in early summer (June–July in most eastern US regions). Plant a succession crop in early July after the main moth flight — these plants avoid the worst damage. Wrap stem bases with aluminum foil as a physical deterrent.
What grows well with zucchini?
The classic Three Sisters combination — corn, beans, and squash (zucchini is a squash) — has been used for centuries. Corn provides support for beans, beans fix nitrogen, and the large zucchini leaves shade the soil to suppress weeds. Nasturtiums and marigolds nearby deter squash bugs and beetles.