Conditional — Some Areas
chamomile (zones 2-8) has limited zone overlap with Wyoming (3a-5b). Only zones 3-5 in the state are suitable.
Your yard isn't the whole zone.
Chamomile is grown as an annual, so your winter zone isn't the deciding factor — your frost-free window is, and slope, trees, and low spots move the last-frost date across a single yard. Enter your address and we'll score chamomile against your parcel's actual frost dates, sun, and soil.
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Zone Comparison
Chamomile Needs
- USDA Zones: 2-8
- Soil pH: 5 - 7
- Sun: Full Sun
- Drainage: well (dry spells)
- Frost-Free Days: 270+
Wyoming Has
- USDA Zones: 3a-5b
- Last Frost: May 10 - Jun 15
- First Frost: Aug 25 - Sep 25
- Annual Rainfall: 6-20 inches
- Common Soils: Sandy loam, Clay, Alkaline
Plant Zone Range (zones 2-8)
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 Chamomile in Wyoming
The frost window
Across Wyoming, the last spring frost clears between May 10 and Jun 15, and the first fall frost lands between Aug 25 and Sep 25 (NOAA Climate Normals 1991-2020). Counting from the latest last frost to the earliest first frost, that's a 71-day window you can count on — up to 138 days on a mild site in a kind year.
Frost tenderness
Chamomile is frost-tender — its listed minimum temperature is 42.8°F (USDA PLANTS Database) — so set plants out after the last frost has cleared your local site, not the state's earliest date.
Days to maturity vs. the window
At 70 days to maturity (USDA PLANTS Database), one crop fits Wyoming's 71-day dependable window with 1 days of margin — plant at the front of the window to keep that cushion.
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
Chamomile wants 270+ frost-free days; a typical Wyoming site sees ~170 (NOAA Climate Normals). That leaves tight; use transplants and pick early-maturing cultivars.
Growing degree days
Chamomile needs ~1000 GDD (base 50°F) to ripen. The state median runs ~2700 GDD (USDA NRCS county aggregates), so Wyoming's typical season clears that easily.
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
Chamomile likes near-neutral soil (pH 5-7). That's the common-ground band across Wyoming's sandy loam and clay — a soil test confirms it for your site. Drainage matters: this plant wants well (dry spells). If your Wyoming site is heavier clay or sits in a low spot, raised beds or amendment with compost solve it.
Plant pH and drainage requirements from USDA PLANTS Database. Wyoming soil profile from USDA NRCS SSURGO. Site-specific verification: a 30-minute soil test from your local Extension lab.
Chamomile in Wyoming — Quick Answer
- Verdict: Conditional — Some Areas
- Plant Zones: 2-8 (USDA PLANTS Database)
- State Zones: 3a-5b (USDA ARS PHZM 2023)
- Growing Season: May 10 - Jun 15 to Aug 25 - Sep 25 (NOAA Climate Normals)
- Days to Maturity: 70 days
What Else to Consider
Zone compatibility tells you about winter cold survival — but Wyoming growers also need to think about:
Extremely short growing season (60-90 frost-free days)
At 60-90 frost-free days, a greenhouse or high tunnel isn't optional equipment — it's where the season actually happens.
Very low rainfall requires irrigation
Drip irrigation under mulch makes scarce water go the distance — build the system before the first bed.
Persistent high winds desiccate and damage plants
Windbreaks first, plants second — a sheltered bed loses a fraction of the moisture an exposed one does.
Pollinator + Wildlife Value
Chamomile draws pollinators (moderate value, USDA PLANTS Database). Planting it near vegetable beds can lift fruit set on neighboring crops.
Wyoming Cooperative Extension
For Wyoming-specific cultivar recommendations, planting calendars, and pest pressure for chamomile, the canonical source is University of Wyoming Extension. Their fact sheets carry the local trial data we can't generalize across 50 states.
Common Questions About Growing Chamomile in Wyoming
When can I plant Chamomile in Wyoming?
Wyoming's last spring frost clears between May 10 and Jun 15, and the first fall frost lands between Aug 25 and Sep 25 (NOAA Climate Normals 1991-2020). Chamomile is frost-tender — its listed minimum temperature is 42.8°F (USDA PLANTS Database) — so wait until the last frost has cleared your specific site before planting out.
Can Chamomile mature before first frost in Wyoming?
Yes — Chamomile matures in 70 days (USDA PLANTS Database), and Wyoming's dependable frost-free window runs 71 days (NOAA Climate Normals 1991-2020), leaving 1 days of margin. Plant just after last frost and it ripens ahead of the first fall frost.
What hardiness zone is Chamomile grown in across Wyoming?
Wyoming spans USDA hardiness zones 3a-5b (USDA ARS PHZM 2023). Chamomile carries a range of zones 2-8, so the overlap zones are where outdoor growing is most reliable.
How many frost-free days does a typical Wyoming site have?
A typical Wyoming site sees ~170 frost-free days per year (derived from NOAA Climate Normals 1991-2020). Chamomile needs 270+ frost-free days, so check whether your local microclimate runs above or below the state average before settling on a planting date.
How should I amend the soil for Chamomile in Wyoming?
Chamomile prefers pH 5-7 and well (dry spells) drainage (USDA PLANTS Database). That sits in the common-ground band across Wyoming soils — a 30-minute soil test from a local Extension lab confirms it for your specific site.
Will Chamomile actually grow on my specific land in Wyoming?
State-level zone + climate data is a sketch. A Growable Ground parcel report scores chamomile 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 Wyoming
State-level data is a sketch. Your Growable Ground report scores chamomile 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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