Unlikely — Zone Mismatch
cardamom (zones 10-13) does not overlap with South Carolina's zone range (7a-9b). Growing outdoors is unlikely without significant protection.
One zone short — what would close it
Cardamom is hardy to zone 10, and the warmest ground in South Carolina is zone 9 — 1 zone short. Planted in open ground it will not survive a South Carolina winter. To grow it here, grow cardamom in a container and move it under cover for the coldest weeks, or give it a greenhouse.
Season extension and overwintering under cover both work at this margin. How to buy the weeks →
Zone math from 10-13 (plant) against 7-9 (South Carolina). Lift modeled by crop_engine Sprint 20B effective_zone_modifier (+2 zones) via api/fast_sections.py Unlock Engine v2.
Your yard isn't the whole zone.
South Carolina spans zones 7a-9b, but your yard has its own microclimate — slope, trees, and low spots shift frost and sun across a single parcel. Enter your address and we'll score cardamom against your land's actual soil, sun, and frost.
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Zone Comparison
Cardamom Needs
- USDA Zones: 10-13
- Frost-Free Days: 240+
- Sun: Part Sun
- Mature size: 12 ft tall
- Drought tolerance: Low
South Carolina Has
- USDA Zones: 7a-9b
- Last Hard Freeze (28°F): Feb 27 - Mar 12
- First Hard Freeze (28°F): Nov 23 - Dec 1
- Annual Rainfall: 45-55 inches
- Common Soils: Red clay (Piedmont), Sandy loam (Coastal), Alluvial
Plant Zone Range (zones 10-13)
Preferred Soil pH
Plant data: USDA PLANTS Database / Growable Ground plant catalog. State data: USDA ARS PHZM 2023, NOAA Climate Normals, NRCS SSURGO.
When to Plant Cardamom in South Carolina
The frost window
Across South Carolina, the last spring hard freeze (28°F) clears between Feb 27 and Mar 12, and the first fall hard freeze lands between Nov 23 and Dec 1 (NOAA Regional Climate Centers ACIS, 1991-2020). Counting from the latest last freeze to the earliest first freeze, that's a 256-day window you can count on — up to 277 days on a mild site in a kind year. That marks the hard freeze, not the last light frost, so tender transplants usually wait another 2-3 weeks.
Frost tenderness
Cardamom is frost-tender — its listed minimum temperature is 50°F (USDA PLANTS Database) — so set plants out two to three weeks PAST your local last hard freeze, not on it and not on the state's earliest date. The 28°F marker above is when killing freezes stop, not when light frost does.
When to start the seed
Those dates are when cardamom goes out, not when it starts. It is sown under cover about 12 weeks ahead, so counting back from South Carolina's late-side last freeze of Mar 12 is what fixes your sowing date — and a yard that clears frost earlier than the state's late date starts earlier still.
Grown as an annual here
Cardamom is a true perennial in its home range — it overwinters from USDA zone 10 and warmer (NC State Extension Gardener Plant Toolbox; Missouri Botanical Garden Plant Finder) — but South Carolina runs as cold as zone 7, so it is killed back each winter and replanted each spring. Treat it on the season schedule above, not as a permanent planting: there is no fall establishment window for it here.
Timing tuned to sub-state frost dates — Chester County, not the statewide average.
Frost window: NOAA Climate Normals 1991-2020. Plant timing fields: USDA PLANTS Database. Your site's own frost dates can run earlier or later than the state range — a parcel report pins them down.
Growing Season Fit
The zone check says cardamom does not survive a South Carolina winter in the ground. The season figures below measure a different question — whether it could finish a season here at all — and they only bear on South Carolina under protection.
Frost-free days
Cardamom wants 240+ frost-free days; a typical South Carolina site sees ~265 (NOAA Regional Climate Centers ACIS, 1991-2020). That leaves a workable window — start indoors to bank time.
Growing degree days
Cardamom needs ~5000 GDD (base 50°F) to ripen. The state median runs ~5233 GDD (from PRISM 1991-2020 climate normals), so South Carolina sits right at the threshold — pay attention to siting and microclimate.
GDD and chill-hour figures are computed from PRISM 1991-2020 monthly climate normals; frost-free days from NOAA Regional Climate Centers ACIS, 1991-2020. Each is the state median across its counties (P25/P75 span the within-state spread). Hardiness-zone range is USDA PHZM 2023.
Soil + Drainage Fit
Cardamom likes near-neutral soil (pH 4.8-7). That's the common-ground band across South Carolina's red clay (piedmont) and sandy loam (coastal) — a soil test confirms it for your site. It will grow across that whole span, but it does best between pH 5.5 and 6 — worth knowing before you decide whether a South Carolina soil test result is a problem or just a number. Drainage matters: this plant wants well (dry spells). If your South Carolina site is heavier clay or sits in a low spot, raised beds or amendment with compost solve it.
Your land, not the state average
SSURGO maps about 21.6% of South Carolina as poorly or somewhat-poorly drained, and the class flips parcel to parcel. Cardamom has low drought tolerance, so it is the fast-draining end that will cost you — your soil map unit, not the state average, is the real answer.
Check your parcel → Source: USDA NRCS SSURGO.
Plant pH and drainage requirements from USDA PLANTS Database. South Carolina soil profile from USDA NRCS SSURGO. Site-specific verification: a 30-minute soil test from your local Extension lab.
Cardamom in South Carolina — Quick Answer
- Verdict: Unlikely — Zone Mismatch
- Plant Zones: 10-13 (USDA PLANTS Database)
- State Zones: 7a-9b (USDA ARS PHZM 2023)
- Growing Season: 28°F hard freezes about Feb 27 - Mar 12 to Nov 23 - Dec 1 (NOAA Regional Climate Centers ACIS, 1991-2020)
- Days to Maturity: 365 days
What Else to Consider for Cardamom in South Carolina
Zone compatibility tells you about winter cold survival — but South Carolina growers also need to think about:
Red Piedmont clay requires amendment for drainage
High heat and humidity promote diseases
Hurricane risk along the coast
Growing cardamom here specifically
Cardamom needs sharp drainage and sends shallow roots hardy to about 50°F; in South Carolina, about 21.6% of soils are poorly-drained (SSURGO), and standing water is what actually kills it.
Build cardamom up on a coarse, free-draining mound so its crown never sit in saturated soil. How to handle it →
What to actually do about these — and the constraints that apply to every South Carolina grower, not just cardamom — is covered on the South Carolina growing guide.
Timing shifts within South Carolina
South Carolina isn't one climate. In Chester County, the last hard freeze (28°F) holds until about Mar 22 — roughly 14 days later than the recorded state median — so plant cardamom to your county's window, not the statewide date.
Cardamom needs about 240 days of frost-free season to complete its cycle. 44 of South Carolina’s 46 counties give it that outright. The tightest that does is Laurens County at 240 frost-free days — 0 to spare. Below that line you are transplanting or extending the season, not direct-sowing.
Across South Carolina’s 46 counties the frost-free season runs from 237 days in Chester County to 320 days in Charleston County — a spread of 83 days, which is why a single statewide planting date misleads. The median South Carolina county sees 265 frost-free days, leaving cardamom about 25 days of slack on a typical parcel — room for a second sowing where the season runs long.
County last-freeze dates and frost-free day counts: NOAA Regional Climate Centers ACIS (1991-2020), county 28°F freeze (earlier than the folk 32°F "last frost"). Cardamom's 240-day requirement: USDA PLANTS / Growable Ground plant database (minimum frost-free days). A parcel report resolves your address's own frost dates.
Pollinator + Wildlife Value
Cardamom draws native bees (low value, Growable Ground Plant Database). Planting it near vegetable beds can lift fruit set on neighboring crops. Outdoors, cardamom can only work that bloom inside South Carolina's frost window — roughly 265 days, opening after the last 28°F freeze (Feb 27 - Mar 12) and closing at the first (Nov 23 - Dec 1), per NOAA Regional Climate Centers ACIS, 1991-2020.
Recommended Cardamom Varieties for South Carolina
South Carolina publishes no state variety trial for cardamom, so we won't invent a "best for South Carolina" list. Choose types rated to your USDA hardiness zone (7a-9b), and confirm winter survival and drainage against your own parcel.
South Carolina Cooperative Extension
For South Carolina-specific cultivar recommendations, planting calendars, and pest pressure for cardamom, the canonical source is Clemson Cooperative Extension. Their fact sheets carry the local trial data we can't generalize across 50 states.
Common Questions About Growing Cardamom in South Carolina
When can I plant Cardamom in South Carolina?
South Carolina's last spring hard freeze (28°F) clears between Feb 27 and Mar 12, and the first fall hard freeze lands between Nov 23 and Dec 1 (NOAA Regional Climate Centers ACIS, 1991-2020). Cardamom overwinters only from USDA zone 10 and warmer, and South Carolina runs as cold as zone 7, so it is grown as an annual here — plant it after the last hard freeze, two to three weeks later for tender stock, and expect to replant next spring rather than establishing it for the long term.
What hardiness zone is Cardamom grown in across South Carolina?
South Carolina spans USDA hardiness zones 7a-9b (USDA ARS PHZM 2023). Cardamom carries a range of zones 10-13, so the overlap zones are where outdoor growing is most reliable.
How many frost-free days does a typical South Carolina site have?
A typical South Carolina site sees ~265 frost-free days per year (derived from NOAA Regional Climate Centers ACIS, 1991-2020). Cardamom needs 240+ frost-free days, so check whether your local microclimate runs above or below the state average before settling on a planting date. In cooler counties like Chester, the freeze-free season runs shorter than the state average, so verify your own county's window.
How should I amend the soil for Cardamom in South Carolina?
Cardamom prefers pH 4.8-7 and well (dry spells) drainage (FAO ECOCROP). That sits in the common-ground band across South Carolina soils — a 30-minute soil test from a local Extension lab confirms it for your specific site.
Will Cardamom actually grow on my specific land in South Carolina?
State-level zone + climate data is a sketch. A Growable Ground parcel report scores cardamom against your address's exact soil pH, drainage, sun, and frost-date data drawn from USDA SSURGO, NOAA, and PRISM — not state averages.
Check your specific parcel in South Carolina
State-level data is a sketch. Your Growable Ground report scores cardamom against your parcel's exact soil, sun, drainage, and frost data — not zone averages.
Three things about your lot that South Carolina cardamom averages can't show:
We read public map data around South Carolina — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the South Carolina cardamom average
Explore More
Growing guides for cardamom
Analysis by the Growable Ground research team, grounded in USDA PLANTS, USDA NRCS SSURGO, NOAA Climate Normals (1991-2020), and named Cooperative Extension sources. How we know →
Cite this dataset
Kirchick, M. (2026). Growable Ground Plant Database [Data set]. Zenodo. https://doi.org/10.5281/zenodo.21435643
Licensed CC BY-NC 4.0. DOI 10.5281/zenodo.21435643
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