How to Grow Zucchini
Cucurbita pepo
A fast, warm-season summer squash picked while the skin and seeds are still tender.
At a glance
Difficulty
Easy
Sunlight
Full sun
6 to 10 hours of sun a day Water
Thirsty
First harvest
50 to 65 days
from planting out
Plant spacing
24 to 36 in apart
More about this plant
Give zucchini sun, warm soil and plenty of room. Water the roots deeply, watch for bee activity and check for new fruit every day once harvest begins.
- Grows for one season.
- Can grow in raised beds, the open ground.
- A good one to grow together with children.
- Ready to pick quickly.
Optional local dates
Planting dates where you live
The growing guide above works anywhere. This section adds local frost dates when we have them.
Optional local dates
Optional local datesGet planting dates for where you live
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Helpful gardening guides
When to plant
Match these relative steps to your local seasons. Where frost applies, use the last freezing night in spring and the first in fall. In frost-free climates, follow trusted local seasonal guidance.
- Start indoors 3 weeks before your last spring frostStart in a small individual pot about three weeks before planting time so the roots stay together.
- Sow outdoors 1 to 3 weeks after your last spring frostSow after frost danger has passed and the soil has warmed.
- Plant out 1 to 3 weeks after your last spring frostPlant outside in warm soil and disturb the roots as little as possible.
- Ready to pick about 50 to 65 days from planting out.
What you need
- How to start itFrom seed or a young plantYou can sow it straight into the ground, or start it indoors first.
- How far apart24 to 36 inLeave 36 to 60 in between rows.
Leave 24 to 36 in between plants and 36 to 60 in between rows. View from above; drawing is not to scale.
Step by step
- Wait until frost danger passesPlant outside only after the soil has warmed. Cold ground slows this tender crop.
- Give each bush roomLeave about two to three feet between single plants so light, water and bees can reach them.
- Build good soilMix finished compost into moist, well-drained soil before planting.
- Water at the baseSoak the root zone deeply, especially in hot weather and once fruit begins to form.
- Let bees reach the flowersAvoid spraying open flowers. Male blooms often appear before the first female blooms.
- Check for fruit every dayCut tender zucchini at about 6 to 8 inches before the rind hardens.
Common mistakes
- Crowding the plantsA tight canopy blocks light and bee activity. Give each bush two to three feet.
- Worrying about the first male flowersMale flowers often come first. Female flowers with a tiny squash at the base follow later.
- Waiting too long to pickZucchini grows quickly. Oversized fruit has a harder rind and slows the next harvest.
Water
Thirsty
Water deeply and regularly at the base, especially in hot, dry weather and after the first fruit begins to form.
- Too dry
- About right
- Too wet
- If it goes drySuffers quickly when dryLeaves wilt, flowers may fail and young fruit can stop growing.
- If it stays wetDislikes sitting wetWet leaves and soggy soil can make fruit and leaf disease more likely.
Looking after it
- FeedingAn occasional feed helpsMix compost into the soil before planting. If the soil needs more food, use a light side dressing when female flowers begin to appear.
- ThinningThin seedlings to 24 in apartCrowded seedlings stay small. Pull the weaker ones and keep the strongest.
- MulchMulch around plants after the soil warms to hold moisture, slow weeds and keep fruit cleaner.
- PollinationMale flowers often appear one or two weeks before female flowers. Bees must move pollen between them, and rainy weather can slow fruit set.
Harvest
You will know it is ready when: Pick zucchini while the rind is tender, usually at about 6 to 8 inches long. A rind too hard to mark with a thumbnail is overripe.
Check every day once fruit starts. Cut the stem cleanly and remove oversized fruit so new fruit can keep forming.
- Keeping itKeeps 5 to 14 daysKeep unwashed zucchini cool and humid and use it within about 5 to 14 days.
Is this right for you?
Warm weather and warm soil after frost danger has passed. Frost harms the top growth and cold soil slows sprouting.
- LightFull sunAbout 6 to 10 hours of direct sun a day.
- ShadeNeeds full light
- SeasonA warm season cropUsually grown in spring or summer.
- FrostFrost kills it
- HeatLoves heat
Soil
- Soil pH6.0 to 8.0A cheap test kit from a garden centre will tell you yours.
- Soil it likesLoam, Silt
- DrainageWants well drained ground
- RichnessAverage ground is fine
Use moist, well-drained soil with plenty of organic matter. Mix finished compost into the bed before planting.
Use a soil test before adding fertilizer. A light feeding can help when the first female flowers appear.
The year at a glance
Measured from your last spring frost, because seasons differ from garden to garden. In frost-free climates, use trusted local seasonal guidance alongside these relative steps.
Start seeds indoors
3 weeks before your last spring frost
Sow outdoors
1 to 3 weeks after your last spring frost
Plant out
1 to 3 weeks after your last spring frost
Questions people ask
Why do I have flowers but no zucchini?
The first flowers may all be male. Later, bees must move pollen to female flowers. Rainy weather and crowding can slow that work.
How big should zucchini be when I pick it?
About 6 to 8 inches is a useful target. Pick while the rind is tender enough to mark with a thumbnail.
Does zucchini need a trellis?
No. Most summer squash grows as a spreading bush. Give it enough open ground instead.
How often should I check for fruit?
Every day once harvest starts. A small zucchini can become oversized very quickly.
Also filed under: Vegetables
Where this came from
Advice varies with your climate and variety. Check the sources behind each section.
Sources & review dates
- Light and weather
- University of Maryland Extension, Growing Summer Squash (Zucchini) in a Home Garden · checked 2026-09-15
- North Carolina State University Extension, Cucurbita pepo · checked 2026-09-15
- Planting
- University of Maryland Extension, Growing Summer Squash (Zucchini) in a Home Garden · checked 2026-09-15
- Timing
- University of Maryland Extension, Growing Summer Squash (Zucchini) in a Home Garden · checked 2026-09-15
- Soil
- North Carolina State University Extension, Cucurbita pepo · checked 2026-09-15
- University of Maryland Extension, Growing Summer Squash (Zucchini) in a Home Garden · checked 2026-09-15 · Compost and medium fertility
- Water
- University of Maryland Extension, Growing Summer Squash (Zucchini) in a Home Garden · checked 2026-09-15
- Looking after it
- University of Maryland Extension, Growing Summer Squash (Zucchini) in a Home Garden · checked 2026-09-15
- Harvest
- University of Maryland Extension, Growing Summer Squash (Zucchini) in a Home Garden · checked 2026-09-15
- Step by step
- University of Maryland Extension, Growing Summer Squash (Zucchini) in a Home Garden · checked 2026-09-15
- Questions people ask
- University of Maryland Extension, Growing Summer Squash (Zucchini) in a Home Garden · checked 2026-09-15