Zucchini vs Cucumber: How to Tell Them Apart
The zucchini vs cucumber question starts with botany. Zucchini is a summer squash in the species Cucurbita pepo, while cucumber is Cucumis sativus. NC State Extension lists zucchini under Cucurbita pepo, plus University of Minnesota Extension names cucumber as Cucumis sativus. Both belong to the gourd family but differ in habit, leaves plus fruit.
The short answer
Zucchini is a summer squash in the species Cucurbita pepo. Cucumber is a separate genus plus species, Cucumis sativus. Both are warm season vine crops in the gourd family. Cucumbers often vine plus can climb a trellis, while many zucchini are bush types. Cucumber leaves are broad plus prickly, while zucchini leaves are large plus lobed.
Are zucchini and cucumber the same species?
No. NC State Extension lists zucchini with acorn squash, pumpkin plus ornamental gourd under one species, Cucurbita pepo. University of Minnesota Extension names cucumber as Cucumis sativus, a different genus. UF/IFAS notes cucumbers are members of the Cucurbitaceae family plus close relatives of summer squash, pumpkin plus winter squash.
| Trait | Zucchini | Cucumber |
|---|---|---|
| Species | Cucurbita pepo | Cucumis sativus |
| Family | Cucurbitaceae (gourd family) | Cucurbitaceae (gourd family) |
| Growth habit | Vining or bush types | Vining or bush types, vines may need a trellis |
| Leaves | Prickly, lobed, over 6 inches long | Long, broad plus prickly |
| Flowers | Separate male plus female flowers | Separate male plus female flowers |
| Harvest | Before fruit is over large with hard skin | At the size you prefer, 40 to 65 days after planting in Florida |
Source: NC State Extension, University of Minnesota Extension plus UF/IFAS Gardening Solutions.
How do the plants and leaves differ?
University of Minnesota Extension notes some summer squash varieties form long rambling vines, while bush types fit more easily into a small garden. NC State Extension describes Cucurbita pepo leaves as prickly plus lobed, longer than 6 inches. UF/IFAS describes cucumbers as vines with long, broad, prickly leaves that go on producing fruit on new growth. University of Minnesota Extension notes vining cucumbers can be trained up a three to four foot trellis.
How do the fruits differ at harvest?
University of Minnesota Extension advises picking summer squash at the size you prefer but before it is over large, with large seeds, hard skins plus fibrous or watery flesh. Tiny baby fruits are tenderer. UF/IFAS describes cucumber fruit as long plus cylindrical, yellow green to dark green. University of Minnesota Extension suggests picking pickling cucumbers at a uniform size.
How to: step by step
- Check the species on the seed packet: Cucurbita pepo for zucchini, Cucumis sativus for cucumber.
- See whether the plant forms a compact bush or long vines.
- Feel the leaves: zucchini leaves are large plus lobed, cucumber leaves are broad plus prickly.
- Train vining cucumbers up a three to four foot trellis.
- Expect separate male plus female flowers on both.
- Pick zucchini before the skin hardens plus cucumbers at the size you prefer.
Troubleshooting
Mixed up seedlings: the young plants look alike. Mark each row at sowing plus compare leaf shape once true leaves form.
Wrong spacing: plant size differs. University of Minnesota Extension suggests two to three feet between rows or hills for bush types plus five to six feet between hills for vines.
Poor fruit set: weak pollination. University of Minnesota Extension notes cold, rain or cloudy weather can reduce pollination by bees.
For related reading see cannabis leaf anatomy, companion plants when growing marijuana plus what roles do bees play in outdoor cannabis. Kind Seed Co also stocks cannabis seeds.
Sources
- Growing summer squash plus zucchini in home gardens, University of Minnesota Extension
- Growing cucumbers in home gardens, University of Minnesota Extension
- Cucumbers, UF/IFAS Gardening Solutions
- Cucurbita pepo, NC State Extension Gardener Plant Toolbox
- Growing pumpkins, University of Illinois Extension
FAQ
Can zucchini and cucumber cross pollinate?
No. University of Illinois Extension notes varieties within one Cucurbita species can cross, but varieties from different species do not. Zucchini is Cucurbita pepo, while cucumber belongs to a different genus, Cucumis sativus. Crossing also never changes the current season's fruit. It shows up only if saved seed is sown the next year.
How far apart should each be planted?
University of Minnesota Extension suggests the same plan for both. Sow vining types two inches apart with two to three feet on either side of the row, or plant hills of three or four seeds five to six feet apart. Bush types fit in rows or hills two to three feet apart. Thin seedlings to 8 to 12 inches.
How soon are cucumbers ready?
UF/IFAS notes cucumbers are ready to harvest 40 to 65 days after planting. It does not recommend transplanting them because the roots are very sensitive to damage, so sow seed directly. University of Minnesota Extension suggests sowing summer squash in two plantings three weeks apart for a longer, more even harvest.
Do both need trellises?
Not always. University of Minnesota Extension notes vining cucumbers can be trained to climb a three to four foot trellis, which lets rows sit closer plus produces straight fruit. Bush cucumbers fit a small garden without one. Many zucchini are bush types, while some summer squash varieties form long rambling vines.
How are zucchini and cucumber pollinated?
University of Minnesota Extension notes both crops have separate male plus female flowers, with a small round ovary behind each female flower. An insect must move pollen from male to female flowers, plus bees are the common pollinator. Some newer cucumber varieties set fruit without pollination, which leaves the fruit seedless or nearly so.
