Eucalyptus in Zone 4a & 4b
Eucalyptus pulverulenta
Yes, eucalyptus grows in zones 4a and 4b. Start seeds indoors Mar 13–Mar 20 and plant out May 22–May 29.
When to plant eucalyptus 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 13–Mar 20 |
|---|---|
| Direct sow / transplant outside | May 22–May 29 |
| Estimated bloom | Aug 30–Sep 6 (~100 days after transplanting) |
Spacing: 1 per square foot (square-foot-gardening spacing). Mature height: 2-4 ft.
Plant alongside it in zone 4b
These go outside within two weeks of eucalyptus in zone 4b, so one planting day can cover them.
- NasturtiumMay 22–May 29
- MarigoldMay 22–May 29
- Ageratum (Flossflower)May 22–May 29
- Annual Geranium (Pelargonium)May 22–May 29
- Butterfly Weed (Asclepias)May 22–May 29
- Campanula (Bellflower)May 22–May 29
Eucalyptus supplies the silver-blue, rounded foliage familiar from florist bouquets, grown here from seed as an annual cut-flower filler outside its natural zone 9-11 perennial range.
How eucalyptus fits zone 4's season
Zone 4b's frost-free window runs about 128 days, from May 15 to September 20. Eucalyptus needs about 100 days from transplant to first bloom.
Eucalyptus 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 | Bloom |
|---|---|---|---|
| 2a & 2b | Mar 18–Mar 25 | May 27–Jun 3 | Sep 4–Sep 11 |
| 3a & 3b | Mar 28–Apr 4 | Jun 6–Jun 13 | Sep 14–Sep 21 |
| 4a & 4b (your zone) | Mar 13–Mar 20 | May 22–May 29 | Aug 30–Sep 6 |
| 5a & 5b | Mar 8–Mar 15 | May 17–May 24 | Aug 25–Sep 1 |
| 6a & 6b | Feb 21–Feb 28 | May 2–May 9 | Aug 10–Aug 17 |
| 7a & 7b | Feb 6–Feb 13 | Apr 17–Apr 24 | Jul 26–Aug 2 |
| 8a & 8b | Jan 21–Jan 28 | Apr 1–Apr 8 | Jul 10–Jul 17 |
| 9a & 9b | Dec 14–Dec 21 | Feb 22–Mar 1 | Jun 2–Jun 9 |
| 10a & 10b | Nov 28–Dec 5 | Feb 6–Feb 13 | May 17–May 24 |
| 11a & 11b | Oct 30–Nov 6 | Jan 8–Jan 15 | Apr 18–Apr 25 |
Bloom dates are about 100 days after the sow or plant-out date, not after starting seeds indoors.
Zone 2 sows before zone 3 here, which looks wrong and is not. USDA zones rank winter cold, not season length, and zone 2 is mostly interior Alaska, where hard winters come with warm summers. More on what a zone measures.
Good companions
No well-established companions for eucalyptus.
Where to buy eucalyptus seeds
None of the seed suppliers we list carries eucalyptus seeds right now. A local garden center or a specialty seed house is the place to look.
See why we recommend these suppliers →
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See it growing
Search YouTube for "growing eucalyptus" 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 Eucalyptus in USDA zone 4b: when to start seeds indoors, when to direct-sow, and when to expect a bloom.
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