Generally — Most Areas
chrysanthemum (zones 5-9) suits most of South Dakota (4a-5b) — zone 5 are in range, and the rest of the state is the exception.
Your yard isn't the whole zone.
South Dakota spans zones 4a-5b, 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 chrysanthemum against your land's actual soil, sun, and frost.
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Zone Comparison
Chrysanthemum Needs
- USDA Zones: 5-9
- Frost-Free Days: 180+
- Sun: Full Sun
- Mature size: 3 ft tall
- Picking window: ~45 days of harvest
- Drought tolerance: Medium
South Dakota Has
- USDA Zones: 4a-5b
- Last Hard Freeze (28°F): Apr 22 - Apr 29
- First Hard Freeze (28°F): Oct 9 - Oct 15
- Annual Rainfall: 14-26 inches
- Common Soils: Prairie loam, Clay, Sandy loam
Plant Zone Range (zones 5-9)
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 Chrysanthemum in South Dakota
The frost window
Across South Dakota, the last spring hard freeze (28°F) clears between Apr 22 and Apr 29, and the first fall hard freeze lands between Oct 9 and Oct 15 (NOAA Regional Climate Centers ACIS, 1991-2020). Counting from the latest last freeze to the earliest first freeze, that's a 163-day window you can count on — up to 176 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
Chrysanthemum is frost-tender — its listed minimum temperature is 37.4°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 chrysanthemum goes out, not when it starts. It is sown under cover about 8 weeks ahead, so counting back from South Dakota's late-side last freeze of Apr 29 is what fixes your sowing date — and a yard that clears frost earlier than the state's late date starts earlier still.
Timing tuned to sub-state frost dates — Lawrence 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 chrysanthemum survives winter in part of South Dakota, not across all of it. Whether the season is long enough — and warm enough — is a different question.
Frost-free days
Chrysanthemum wants 180+ frost-free days; a typical South Dakota site sees ~168 (NOAA Regional Climate Centers ACIS, 1991-2020) — 12 days short of what it needs. A typical South Dakota season does not carry this crop to harvest outdoors, and a gap that size is not one an earlier sowing date or a faster cultivar closes; growing it here means growing it under cover.
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
Chrysanthemum likes near-neutral soil (pH 5.5-7.3). That's the common-ground band across South Dakota's prairie loam and clay — a soil test confirms it for your site. It will grow across that whole span, but it does best between pH 6 and 6.5 — worth knowing before you decide whether a South Dakota soil test result is a problem or just a number. Drainage matters: this plant wants well (dry spells). If your South Dakota site is heavier clay or sits in a low spot, raised beds or amendment with compost solve it.
Your land, not the state average
South Dakota's soils run mostly loam, but SSURGO maps the series, texture, and drainage under your exact parcel. Chrysanthemum needs about 7 inches of workable depth, so it is that horizon — not the surface — you are testing for. That map unit, not the state average, decides how chrysanthemum performs.
Check your parcel → Source: USDA NRCS SSURGO.
Plant pH and drainage requirements from USDA PLANTS Database. South Dakota soil profile from USDA NRCS SSURGO. Site-specific verification: a 30-minute soil test from your local Extension lab.
Chrysanthemum in South Dakota — Quick Answer
- Verdict: Generally — Most Areas
- Plant Zones: 5-9 (USDA PLANTS Database)
- State Zones: 4a-5b (USDA ARS PHZM 2023)
- Growing Season: 28°F hard freezes about Apr 22 - Apr 29 to Oct 9 - Oct 15 (NOAA Regional Climate Centers ACIS, 1991-2020)
What Else to Consider for Chrysanthemum in South Dakota
Zone compatibility tells you about winter cold survival — but South Dakota growers also need to think about:
Extreme cold and short growing season
Low rainfall in western SD
Wind exposure on the open prairie
Growing chrysanthemum here specifically
Chrysanthemum needs pH 5.5–7.3; South Dakota's dominant loam soils may or may not deliver that, so your parcel's SSURGO map unit is the real test.
Start with a soil test on your own ground and adjust pH and texture to fit chrysanthemum's 5.5–7.3 range. How to handle it →
What to actually do about these — and the constraints that apply to every South Dakota grower, not just chrysanthemum — is covered on the South Dakota growing guide.
Timing shifts within South Dakota
South Dakota isn't one climate. In Lawrence County, the last hard freeze (28°F) holds until about May 12 — roughly 17 days later than the recorded state median — so plant chrysanthemum to your county's window, not the statewide date.
Chrysanthemum needs about 180 days of frost-free season to complete its cycle. 7 of South Dakota’s 66 counties give it that outright. The tightest that does is Bon Homme County at 181 frost-free days — 1 to spare. Below that line you are transplanting or extending the season, not direct-sowing.
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"). Chrysanthemum's 180-day requirement: USDA PLANTS / Growable Ground plant database (minimum frost-free days). A parcel report resolves your address's own frost dates.
Where in South Dakota Fits Best
Even within South Dakota's zones 4a-5b, county microclimates differ enough to change what thrives. These counties carry the closest zone match for chrysanthemum (USDA PHZM 2023):
Pollinator + Wildlife Value
Chrysanthemum draws honeybees and butterflies (moderate value, Growable Ground Plant Database). Planting it near vegetable beds can lift fruit set on neighboring crops. Outdoors, chrysanthemum can only work that bloom inside South Dakota's frost window — roughly 168 days, opening after the last 28°F freeze (Apr 22 - Apr 29) and closing at the first (Oct 9 - Oct 15), per NOAA Regional Climate Centers ACIS, 1991-2020.
Good to Know Before You Plant Chrysanthemum
Chrysanthemum is listed as toxic to dogs, cats (all) at a mild level (ASPCA). Most listed plants only cause brief upset — a raised bed or a fenced corner usually keeps curious pets clear. Worth knowing for placement: in South Dakota this is a one-season plant and the first hard freeze (Oct 9 - Oct 15) takes it down, so the exposure above is a summer-long one rather than something standing in the bed all year.
Recommended Chrysanthemum Varieties for South Dakota
South Dakota publishes no state variety trial for chrysanthemum, so we won't invent a "best for South Dakota" list. Choose types rated to your USDA hardiness zone (4a-5b), and confirm winter survival and drainage against your own parcel.
South Dakota Cooperative Extension
For South Dakota-specific cultivar recommendations, planting calendars, and pest pressure for chrysanthemum, the canonical source is SDSU Extension. Their fact sheets carry the local trial data we can't generalize across 50 states.
Common Questions About Growing Chrysanthemum in South Dakota
When can I plant Chrysanthemum in South Dakota?
South Dakota's last spring hard freeze (28°F) clears between Apr 22 and Apr 29, and the first fall hard freeze lands between Oct 9 and Oct 15 (NOAA Regional Climate Centers ACIS, 1991-2020). Chrysanthemum is frost-tender — its listed minimum temperature is 37.4°F (USDA PLANTS Database) — so wait two to three weeks past your site's last hard freeze, when light frost has also stopped, before planting out.
What hardiness zone is Chrysanthemum grown in across South Dakota?
South Dakota spans USDA hardiness zones 4a-5b (USDA ARS PHZM 2023). Chrysanthemum carries a range of zones 5-9, so the overlap zones are where outdoor growing is most reliable.
How many frost-free days does a typical South Dakota site have?
A typical South Dakota site sees ~168 frost-free days per year (derived from NOAA Regional Climate Centers ACIS, 1991-2020). Chrysanthemum needs 180+ 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 Lawrence, the freeze-free season runs shorter than the state average, so verify your own county's window.
How should I amend the soil for Chrysanthemum in South Dakota?
Chrysanthemum prefers pH 5.5-7.3 and well (dry spells) drainage (FAO ECOCROP). That sits in the common-ground band across South Dakota soils — a 30-minute soil test from a local Extension lab confirms it for your specific site.
Will Chrysanthemum actually grow on my specific land in South Dakota?
State-level zone + climate data is a sketch. A Growable Ground parcel report scores chrysanthemum 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 Dakota
State-level data is a sketch. Your Growable Ground report scores chrysanthemum against your parcel's exact soil, sun, drainage, and frost data — not zone averages.
Three things about your lot that South Dakota chrysanthemum averages can't show:
We read public map data around South Dakota — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the South Dakota chrysanthemum average
Explore More
Growing guides for chrysanthemum
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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