PlantWhy

Zucchini

Cucurbita pepo · Vegetable

Famously productive: one or two plants are usually enough for a household. It grows fast in warm soil, and the trick is to pick often while the fruit is still small and tender.

Zucchini
Photo: Evan-Amos, Public domain · Wikimedia Commons
💧WaterEvery 2–3 days in summer, deep at the base (estimated)
☀️LightFull sun, 6–8 hours
🐾PetsGenerally safe

Care at a glance

Light
Full sun, 6–8 hours a day
Water
1–2 in per week, deep, at the base
Soil
Rich, well-drained, pH 6.0–7.5
Temperature
Best 65–85 °F; frost kills it
Spacing
24–36 in apart, 36–48 in between rows
Container
At least 5 gallons, 12 in deep, per plant
Harvest
45–60 days from sowing (estimated)
Lifespan
Annual

When?

Sow directly outdoors 1–2 weeks after your last frost, when soil is above 65 °F. A second sowing in early summer extends the harvest (estimated).

Step by step

  1. Work compost into a sunny bed before sowing.
  2. Sow 2–3 seeds 1 in deep per spot; they sprout in 5–10 days in warm soil.
  3. Thin to the strongest seedling once true leaves appear.
  4. Water deeply at the base; avoid wetting the leaves.
  5. Mulch to keep moisture steady and fruit off the soil.
  6. Hand-pollinate with a small brush if fruit shrivels early.
  7. Pick at 6–8 in long, every day or two at peak season.

Common problems

White powder on leavesPowdery mildew; space plants, water at the base, remove bad leaves.
Small fruit rots at the tipPoor pollination; hand-pollinate and encourage bees.
Plant suddenly wiltsStem borers or dry soil; check the stem base and water deeply.

Pets

Not listed as toxic by ASPCA; plain cooked zucchini is generally not a concern, but don't let pets eat lots of leaves. If in doubt, ask your vet.

Related tools

Planting calendarSoil and mulch calculator

Similar plants

PumpkinCucumberGreen Bean

Sources

This page is general guidance; no pesticide doses are given.