Tomatillo in Zone 4a & 4b
Physalis philadelphica
Yes, tomatillo grows in zones 4a and 4b. Start seeds indoors Mar 27–Apr 3 and plant out Jun 5–Jun 12.
When to plant tomatillo 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 | Mar 27–Apr 3 |
|---|---|
| Direct sow / transplant outside | Jun 5–Jun 12 |
| Estimated harvest | Aug 9–Aug 16 (~65 days after transplanting) |
Spacing: about 4 square feet per plant (square-foot-gardening spacing). Mature height: 2-4 ft.
Plant alongside it in zone 4b
These go outside within two weeks of tomatillo 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
Tomatillo is a tomato relative grown for its tart, green (or purple) fruit, each wrapped in a papery husk. It's a staple of salsa verde and green chili, and it grows a lot like a sprawling, vigorous tomato plant.
How tomatillo fits zone 4's season
Zone 4b's frost-free window runs about 128 days, from May 15 to September 20. Tomatillo needs about 65 days from transplant to first harvest.
Tomatillo 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 |
|---|---|---|---|
| 3a & 3b | Apr 11–Apr 18 | Jun 20–Jun 27 | Aug 24–Aug 31 |
| 4a & 4b (your zone) | Mar 27–Apr 3 | Jun 5–Jun 12 | Aug 9–Aug 16 |
| 5a & 5b | Mar 22–Mar 29 | May 31–Jun 7 | Aug 4–Aug 11 |
| 6a & 6b | Mar 7–Mar 14 | May 16–May 23 | Jul 20–Jul 27 |
| 7a & 7b | Feb 20–Feb 27 | May 1–May 8 | Jul 5–Jul 12 |
| 8a & 8b | Feb 4–Feb 11 | Apr 15–Apr 22 | Jun 19–Jun 26 |
| 9a & 9b | Dec 28–Jan 4 | Mar 8–Mar 15 | May 12–May 19 |
| 10a & 10b | Dec 12–Dec 19 | Feb 20–Feb 27 | Apr 26–May 3 |
| 11a & 11b | Nov 13–Nov 20 | Jan 22–Jan 29 | Mar 28–Apr 4 |
Harvest dates are about 65 days after the sow or plant-out date, not after starting seeds indoors.
Good companions
No well-established companions for tomatillo.
Where to buy tomatillo seeds
Botanical Interests · True Leaf Market · Burpee · High Mowing Organic Seeds (each supplier's tomatillo seeds)
Varieties we recommend, and where to get them:
- Toma Verde: An early, sweet-flavored green tomatillo that SDSU Extension lists among the reliable home-garden picks. Buy: True Leaf Market · High Mowing Organic Seeds Full notes
See why we recommend these suppliers →
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See it growing
Search YouTube for "growing tomatillo" 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 Tomatillo in USDA zone 4b: when to start seeds indoors, when to direct-sow, and when to expect a harvest.
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