Cucamelon in Zone 4a & 4b
Melothria scabra
Yes, cucamelon grows in zones 4a and 4b. Start seeds indoors Apr 17–Apr 24 and plant out May 29–Jun 5.
When to plant cucamelon in zone 4b
Zones 4a and 4b share the same average frost dates, so this page covers both.
Method: Start indoors: Start indoors from seed, then transplant outside. It needs a head start most zones can't give it by direct-sowing alone.
| Start indoors | Apr 17–Apr 24 |
|---|---|
| Direct sow / transplant outside | May 29–Jun 5 |
| Estimated harvest | Aug 7–Aug 14 (~70 days after transplanting) |
Spacing: 1 per square foot (square-foot-gardening spacing). Mature height: 8-13.5 ft.
Plant alongside it in zone 4b
These go outside within two weeks of cucamelon in zone 4b, so one planting day can cover them.
- TomatoMay 29–Jun 5
- Bush BeansMay 22–May 29
- Sweet CornMay 22–May 29
- CucumberMay 22–May 29
- ZucchiniMay 22–May 29
- Winter SquashMay 22–May 29
Cucamelon is one of the few crops here where the fruit is a novelty and the plant is not. It grows like a small, determined cucumber and it climbs hard.
How cucamelon fits zone 4's season
Zone 4b's frost-free window runs about 128 days, from May 15 to September 20. Cucamelon needs about 70 days from transplant to first harvest.
Cucamelon planting windows in every zone
Zone 4b is highlighted. Useful for comparing against a neighbouring zone, or for a garden somewhere else.
| Zone | Start indoors | Sow or plant out | Harvest |
|---|---|---|---|
| 4a & 4b (your zone) | Apr 17–Apr 24 | May 29–Jun 5 | Aug 7–Aug 14 |
| 5a & 5b | Apr 12–Apr 19 | May 24–May 31 | Aug 2–Aug 9 |
| 6a & 6b | Mar 28–Apr 4 | May 9–May 16 | Jul 18–Jul 25 |
| 7a & 7b | Mar 13–Mar 20 | Apr 24–May 1 | Jul 3–Jul 10 |
| 8a & 8b | Feb 25–Mar 4 | Apr 8–Apr 15 | Jun 17–Jun 24 |
| 9a & 9b | Jan 18–Jan 25 | Mar 1–Mar 8 | May 10–May 17 |
| 10a & 10b | Jan 2–Jan 9 | Feb 13–Feb 20 | Apr 24–May 1 |
| 11a & 11b | Dec 4–Dec 11 | Jan 15–Jan 22 | Mar 26–Apr 2 |
Harvest dates are about 70 days after the sow or plant-out date, not after starting seeds indoors.
Good companions
No well-established companions for cucamelon.
Where to buy cucamelon seeds
True Leaf Market (each supplier's cucamelon seeds)
See why we recommend these suppliers →
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See it growing
Search YouTube for "growing cucamelon" videos → (a live search, not a hand-picked video; results vary and aren't vetted by us)
← Back to the full zone 4b calendar · Plan your beds in the Garden Designer →
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Growing Cucamelon in USDA zone 4b: when to start seeds indoors, when to direct-sow, and when to expect a harvest.
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