Growing Eucalyptus: A Complete Profile
By Growing Home Greens Team · August 10, 2026
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.
Handle the transplant carefully
Transplanting is recommended, sowing seed 8 to 10 weeks before planting out, covered lightly, with high humidity helping germination along. Seedlings dislike root disturbance, so bottom-water or mist rather than watering from above, and avoid letting roots circle in a too-small cell before moving up. Harden off and transplant outside once frost danger has passed. Space plants 12 to 24 inches apart.
Harvest once it’s woody
Cut once the leaves feel leathery and the stems have turned woody, not while the growth is still soft and green. Fresh-cut stems can be hung to dry, or preserved in a glycerin and water solution, which produces a more durable, pliable stem that still looks freshly cut rather than dried.
Eucalyptus has no well-established companion pairings, and nothing it needs to be kept away from. At 1 plant per square foot, it’s a useful foliage filler for the Garden Designer’s cutting rows, grown fresh each year in most climates rather than left in the ground over winter.
Source: Eucalyptus: Key Growing Information, Johnny’s Selected Seeds.
Companion planting guide for Eucalyptus · Find your planting dates
Typically viable in USDA zones 2-11. Not sure your zone? Look it up by ZIP code.
Mature height: 2-4 ft
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.
When to plant eucalyptus, by zone
Every zone eucalyptus grows in. Pick your zone in the header and it will be highlighted here. Each zone links to its full page.
| 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 | 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.
See exact start-indoors, direct-sow, and harvest dates for your zone →
How many Eucalyptus plants fit per square foot?
Spacing: 1 per square foot (square-foot-gardening spacing). Mature height: 2-4 ft.
Varieties worth considering
- 'Baby Blue Bouquet' eucalyptus (E. pulverulenta): Johnny's Selected Seeds describes this as classic florists' eucalyptus, one of their most widely used varieties for fresh and dried arrangements. (source)
- 'Silver Dollar' eucalyptus (E. cinerea) (best for: large round leaves, classic look): Johnny's Selected Seeds describes this as having large, silvery blue-green leaves that appear strung on the stem, a different species from Baby Blue Bouquet with a bolder, rounder leaf shape. (source)
Why each variety is listed comes from the source shown next to it. We haven't grown these ourselves yet, so treat this as a research-backed starting point, not a personal endorsement. The buy links are separate from those sources: they go to seed suppliers that sell that exact variety, and we may earn a commission on some of them.
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.
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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)
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Growing Eucalyptus: Classic florists' silver-blue foliage, grown from seed as an annual cut-flower filler outside its zone 9-11 perennial range.
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