Greek mountain tea
Sideritis syriaca
A low, drought-loving Mediterranean herb grown for its woolly silver-grey rosettes of soft, felted leaves and its stiff summer spikes of small, soft-yellow flowers cupped in densely woolly bracts — the plant known as Greek mountain tea or ironwort. It is a tough alpine and rock-garden subject that wants hot, dry, very sharply drained ground and full sun, and rots in wet or rich soil; it is only borderline hardy. POWO (Kew) records Sideritis syriaca as native to the eastern Mediterranean — Crete, the Levant, and Türkiye. The dried leaves and flower spikes make the traditional caffeine-free Greek herbal infusion long valued as a folk remedy for colds and coughs, so it is parts-edible as a tea but is grown as a herb rather than a food crop. The soft-yellow summer spikes are a good bee plant.
Climate fit: narrow (30/100)
Border
Edible
Pollinator
Container
Light
Full sun
Water
Low water
Mature size
8-18" tall · 12" apart
Hardy in zones
6a-9b
cold to frosty winters
Native in Illinois
No
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Insect-pollinated, and a good bee plant: the soft-yellow, woolly-bracted summer spikes are a genuine nectar source worked by honey bees and solitary bees such as leafcutter and mason bees.
Cold hardiness
These values are location-based: this location's current hardiness is the baseline, and the 2050 value is a projected future climate for this same location.
Now
Zone 6b
Plotwright
USDA Zone 6b
-5°F to 0°F
Well-suited
Zone 7a
Plotwright
0°F to 5°F
Well-suited
In plain terms: This location has cold winters. Its winters are projected to keep warming through 2050.
✓
Well-suited today and still thriving in 2050.
Heat tolerance
Heat tolerance values are location-based too: heat days today are observed at this site, and the 2050 value projects this same location under a future climate.
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Where this plant fits
Suitable across 41 ecoregions — 38 climate-resilient through 2070 · 1 suited today · 2 newly possible by 2070. Best matches first.
Appalachian mixed mesophytic forests
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Appalachian-Blue Ridge forests
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Arizona Mountains forests
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Atlantic coastal pine barrens
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Blue Mountains forests
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Canadian Aspen forests and parklands
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Central Pacific Northwest coastal forests
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Central Tallgrass prairie
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Central-Southern Cascades Forests
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Chilean Matorral
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Sources & citations
Cite this page
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Plotwright. (2026, May 17). Greek mountain tea (Sideritis syriaca). Retrieved 2026, June 25, from https://plotwright.com/plants/sideritis-syriaca
Sources for every fact
Every fact on this page traces to a source. 18 fields cited - 18 source-backed.
Plants of the World Online (POWO)
Botanical research database
Backs 17 fields
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