Conditional — Some Areas
creeping phlox (zones 4-10) has limited zone overlap with Kansas (5b-7a). Only zones 5-7 in the state are suitable.
Your yard isn't the whole zone.
Kansas spans zones 5b-7a, but your yard sits in exactly one — and slope, tree cover, and cold-air pockets nudge it further. Enter your address and we'll score creeping phlox against your parcel's actual hardiness, soil, and sun.
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Zone Comparison
Creeping Phlox Needs
- USDA Zones: 4-10
- Soil pH: 5.7 - 8
- Sun: Part Sun
- Drainage: well (dry spells)
- Frost-Free Days: 100+
Kansas Has
- USDA Zones: 5b-7a
- Last Frost: Apr 5 - May 1
- First Frost: Oct 5 - Oct 30
- Annual Rainfall: 16-42 inches
- Common Soils: Prairie loam, Silt loam, Clay
Plant Zone Range (zones 4-10)
Preferred Soil pH
Plant data: USDA PLANTS Database / plant_species_v5.csv. State data: USDA ARS PHZM 2023, NOAA Climate Normals, NRCS SSURGO.
When to Plant Creeping Phlox in Kansas
The frost window
Across Kansas, the last spring frost clears between Apr 5 and May 1, and the first fall frost lands between Oct 5 and Oct 30 (NOAA Climate Normals 1991-2020). Counting from the latest last frost to the earliest first frost, that's a 157-day window you can count on — up to 208 days on a mild site in a kind year.
Frost hardiness
Creeping Phlox is cold-hardy to -33°F (USDA PLANTS Database), so you can plant on the early side of Kansas's window — even a few weeks before the final frost date.
Establishment timing
As a long-lived plant, creeping phlox isn't racing the calendar to a harvest date. Plant it in spring once the last-frost window passes so roots settle in through the full season, or in early fall while the soil still holds summer warmth.
Timing tuned to sub-state frost dates — Thomas 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
Zone compatibility says you can survive winter here. Whether the growing season is long enough — and warm enough — is a different question.
Frost-free days
Creeping Phlox wants 100+ frost-free days; a typical Kansas site sees ~190 (NOAA Climate Normals). That leaves comfortable headroom for succession planting.
Climate aggregates derive from USDA NRCS county-level hardiness data + Cornell CALS Extension GDD-by-region tables + MSU Extension chill-hours-by-zone (1991-2020 NOAA Climate Normals baseline).
Soil + Drainage Fit
Creeping Phlox likes near-neutral soil (pH 5.7-8). That's the common-ground band across Kansas's prairie loam and silt loam — a soil test confirms it for your site. Drainage matters: this plant wants well (dry spells). If your Kansas site is heavier clay or sits in a low spot, raised beds or amendment with compost solve it.
Your land, not the state average
Kansas's soils run mostly silt loam, but SSURGO maps the series, texture, and drainage under your exact parcel — that map unit, not the state average, decides how creeping phlox performs.
Check your parcel → Source: USDA NRCS SSURGO.
Plant pH and drainage requirements from USDA PLANTS Database. Kansas soil profile from USDA NRCS SSURGO. Site-specific verification: a 30-minute soil test from your local Extension lab.
Creeping Phlox in Kansas — Quick Answer
- Verdict: Conditional — Some Areas
- Plant Zones: 4-10 (USDA PLANTS Database)
- State Zones: 5b-7a (USDA ARS PHZM 2023)
- Growing Season: Apr 5 - May 1 to Oct 5 - Oct 30 (NOAA Climate Normals)
What Else to Consider
Zone compatibility tells you about winter cold survival — but Kansas growers also need to think about:
Low rainfall in western KS requires irrigation
Out west, drip lines and heavy mulch are the growing season — design the water before the beds.
Extreme wind and hail during severe storm season
Stage row cover for hail season and give young plants a windbreak — quick shelter saves seasons.
Hot dry summers with 100F+ days
Lean on the spring and fall windows, shade the summer survivors, and water deep and early in the day.
Growing creeping phlox here specifically
Creeping Phlox needs pH 5.7–8.0; Kansas's dominant silt 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 creeping phlox's 5.7–8.0 range. How to handle it →
Timing shifts within Kansas
Kansas isn't one climate. In Thomas County, the last hard freeze (28°F) holds until about Apr 4 — roughly 19 days later than the recorded state median — so plant creeping phlox to your county's window, not the statewide date.
County last-freeze dates: NOAA/PRISM Climate Normals 1991-2020, 28°F threshold (earlier than the folk 32°F "last frost"). A parcel report resolves your address's own frost dates.
Pollinator + Wildlife Value
Creeping Phlox draws pollinators (high value, USDA PLANTS Database). Planting it near vegetable beds can lift fruit set on neighboring crops.
Recommended Creeping Phlox Varieties for Kansas
Kansas publishes no state variety trial for creeping phlox, so we won't invent a "best for Kansas" list. Choose types rated to your USDA hardiness zone (5b-7a), and confirm winter survival and drainage against your own parcel.
Kansas Cooperative Extension
For Kansas-specific cultivar recommendations, planting calendars, and pest pressure for creeping phlox, the canonical source is K-State Research and Extension. Their fact sheets carry the local trial data we can't generalize across 50 states.
Is Creeping Phlox native to Kansas?
Creeping Phlox is native to parts of the Lower 48, but the USDA PLANTS Database (accessed 2026-07-01) does not document a native range in Kansas. It can still earn a place in a Kansas garden — the zone comparison above tells you whether it will thrive.
Looking for plants that belong here? The Kansas growing guide lists USDA-documented natives for the state.
Native-range data: USDA PLANTS Database state-distribution records, accessed 2026-07-01.
Common Questions About Growing Creeping Phlox in Kansas
When can I plant Creeping Phlox in Kansas?
Kansas's last spring frost clears between Apr 5 and May 1, and the first fall frost lands between Oct 5 and Oct 30 (NOAA Climate Normals 1991-2020). Creeping Phlox is a long-lived planting, so target spring just after your local last frost — or early fall while the soil holds warmth — and let it establish through the season.
What hardiness zone is Creeping Phlox grown in across Kansas?
Kansas spans USDA hardiness zones 5b-7a (USDA ARS PHZM 2023). Creeping Phlox carries a range of zones 4-10, so the overlap zones are where outdoor growing is most reliable.
How many frost-free days does a typical Kansas site have?
A typical Kansas site sees ~190 frost-free days per year (derived from NOAA Climate Normals 1991-2020). Creeping Phlox needs 100+ 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 Thomas, the freeze-free season runs shorter than the state average, so verify your own county's window.
Is Creeping Phlox native to Kansas?
Creeping Phlox is native to parts of the Lower 48, but the USDA PLANTS Database (accessed 2026-07-01) does not document a native range in Kansas. It can still earn a place in a Kansas garden — the zone comparison above tells you whether it will thrive.
How should I amend the soil for Creeping Phlox in Kansas?
Creeping Phlox prefers pH 5.7-8 and well (dry spells) drainage (USDA PLANTS Database). That sits in the common-ground band across Kansas soils — a 30-minute soil test from a local Extension lab confirms it for your specific site.
Will Creeping Phlox actually grow on my specific land in Kansas?
State-level zone + climate data is a sketch. A Growable Ground parcel report scores creeping phlox 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 Kansas
State-level data is a sketch. Your Growable Ground report scores creeping phlox against your parcel's exact soil, sun, drainage, and frost data — not zone averages.
Three things about your exact spot that zone averages miss:
We read public map data for this spot — soil, climate, flood, and parcel records. How we handle your address.
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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 →