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Last edited on October 30, 2026. View history

zucchini Zucchini

Cucurbita pepo. Cucurbita pepo var. cylindrica WD
Also known as courgette (EN) baby marrow (EN)

A variety of Cucurbita pepo

How to sow zucchini: Direct seed indoors or outdoors

Sun requirement for zucchini: Plant in Full Sun

Compost well.
Can be staked to support vertical growth

80
plantings
17
harvests
12
seed packets
Growstuff is a free, community-run site for people who grow food. Keep track of what you plant and harvest, find seeds to swap, and see what is growing near you. Join to record your own zucchini.

Zucchini facts

Lifespan

Annual living and reproducing in a single year or less
17 weeks median lifespan
First harvest expected 13 weeks after planting
Last harvest expected 22 weeks after planting

Spread

150cm

Row Spacing

60cm Members' seed packets: 90cm

Germination

6–10 days median of members' seed packets

Days until maturity

56–33 days median of members' seed packets

When to sow

Southern hemisphere Sep–Feb
Northern hemisphere Mar–Aug
median of members' seed packets

Grown for

fruit harvested 17 times
Optimal temperature 17–30 °C
Absolute temperature 6–40 °C
FAO EcoCrop
Optimal rainfall 600–1500 mm/year
Absolute rainfall 300–2800 mm/year
FAO EcoCrop
Optimal soil pH 5.5–6.8
Absolute soil pH 4.5–8.3
FAO EcoCrop

Crop cycle

40–100 days
FAO EcoCrop

Max altitude

1000 m
FAO EcoCrop

Optimal light

very bright
FAO EcoCrop
What are growing degree days?

A plant grows with warmth, not with days. A growing degree day is one day's worth of useful warmth: how many degrees the day's average temperature is above the lowest temperature the crop grows at. Add them up from planting and you know how far along the crop is, whatever the calendar says.

Say that lowest temperature is 10°C. A day averaging 17°C gives 7 growing degree days. A day averaging 8°C gives none, as it is too cold for the crop to grow. That is why the same lettuce takes about 50 days in a summer and 90 in an autumn: it needs the same total warmth either way.

For zucchini, the FAO EcoCrop database gives a lowest growing temperature of 6°C and a shortest growing cycle of 40 days at its best temperature, about 700 growing degree days to a first harvest.

Where you've told us where your garden is, we use this and the weather there to predict when your zucchini will be ready to harvest. We don't use it for how long a plant lives or when it finishes: we go by what members have logged for that.

Growing zucchini

  1. Sow seeds in pots 4 weeks before planting out
  2. Dig compost into the bed 1 week before planting out
  3. Harden off the seedlings 1 week before planting out
  4. Set or refill beer traps for slugs and snails at planting out every week
  5. Water deeply at the base 1 week after planting out every week
  6. Mulch around the plants 3 weeks after planting out
  7. Hand pollinate the female flowers 6 weeks after planting out
  8. Check leaves for powdery mildew 6 weeks after planting out every 2 weeks
  9. Feed with liquid fertiliser 6 weeks after planting out every 2 weeks
  10. Pick fruit while small at first harvest every week
  11. Pull out finished plants 3 months after first harvest

How members grow zucchini

Sunniness

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Planted from

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Harvested for

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Varieties of zucchini

Image of cocozelle zucchini

cocozelle zucchini

Cucurbita pepo
Image of long green bush marrow

long green bush marrow

Cucurbita pepo

Plant zucchini with

Photos

Zucchini plantings

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by shiny
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2026-10-30_01-12-50
by shiny
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by shiny
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IMG_0326
by shiny
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20210126_124139
by shiny

Zucchini harvests

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IMG_20180204_162413
by shiny
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20250212_135252
by shiny
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IMG_20180310_182902
by shiny
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IMG_20180220_171247
by shiny
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IMG_20180212_184632
by shiny

Zucchini seeds

2020-03-10_09-58-59
2020-03-10_09-58-59
by shiny

Video

Where zucchini grow

Only plantings by members who have set their locations are shown.

What people are saying about zucchini

How to save seeds

by shiny,

Beans, peas and corn: remove husks and allow seeds to dry out – this may take a couple of weeks, then remove casings and store.

Pumpkins and melons: seeds need to be washed and set aside to dry for a week or so before …

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Coming together

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This weekend I had two full days to really focus on the yard, and I made the most of it. With the intermittent help of several others over the course of the weekend, I got both easement planter boxes filled with compost and soil, cleaned up and weeded the alley, got the stump pulled from the coni…

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Getting ready for spring!

by maco,

I've got seeds either on-hand or ordered for just about everything I'm starting from seed this year. I've been working out what I want to plant, and this is the plan I've come up with for the 72 square feet of my backyard raised beds:

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A slow start to summer

by Skud,

I'm so very, very behind on my gardening. I was travelling heaps and had lots of other commitments through October/November, which is peak spring planting time here, and nothing got done. I've come to the realisation that if I'm going to do work that involves that sort of travel, I …

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Too Late for Starting? - Northeast USA

by erin,

I live in Massachusetts in the US, and just found out that I do, indeed, have space for planting in the giant garden that is apparently shared between the neighborhood. Is it too late to start zucchinis and watermelons? What about sauce [tomato](/crops/toma…

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Transplant Ho!

by melannen,

Most of the rest of my seedlings came up last week all together - I had forgotten how violently beens and squash can grow - so I did a bunch of transplanting. All but two of the seeds I started came up, and I think one of the other two is about to - I am gratified! Although if …

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Into bed with you!

by gotica,

I finally got frustrated enough to establish one of the raised beds the other week, using a combination of enriched coir and compost.

I've sown Purple Haze carrots, brussels sprouts, purple broccoli, peas, turnips, english spinach and have transplanted two [zucchini](/crops…

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Another week, another heap of things planted

by Skud,

I really should've got started on winter planting sooner, I think. Everything in the garden is in a lull right now. Although people near me are still blogging about the last of their crops from summer, all we have still going are some chillis and some basil. Lots of things …

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Image of zucchini

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Zucchini harvests

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Find zucchini seeds

Nutritional data

A summary of nutritional data per 100g for Zucchini, green skin, fresh, unpeeled, raw.

Energy 65.0 kJ
Protein 0.9 g
Fat, total 0.3 g
Carbohydrate 1.7 g
- Sugars 1.7 g
Fibre 1.1 g
Sodium 1.0 mg

Ecological requirements

Data from the FAO EcoCrop database for Cucurbita pepo L.

Family / Taxonomy Magnoliopsida
Dilleniidae
Violales
Cucurbitaceae
Life form herb, vine
Life span annual
Habit climber/scrambler/scadent
Optimal soil depth medium (50-150 cm)
Optimal soil texture medium, organic
Optimal soil fertility moderate
Optimal soil drainage well (dry spells)
Optimal soil salinity low (<4 dS/m)
Photoperiod short day (<12 hours), neutral day (12-14 hours), long day (>14 hours)

Learn more about zucchini

Resources outside Growstuff.