When to Plant Chamomile in Fergus County, MT
Chamomile is a daisy-like herb famous for its calming, apple-scented tea. German chamomile is an annual while Roman chamomile is a perennial ground cover.
Fergus County, Montana is in USDA Zone 4a. The average last spring frost is May 20 and the first fall frost is September 20, giving you a growing season of approximately 123 days.
At an elevation of 6,957 feet, Fergus County receives approximately 12 inches of rainfall annually with predominantly loam soil. Summer highs average 80°F, so choose short-season varieties of Chamomile to ensure they mature before fall. With low rainfall, drip irrigation is essential for growing Chamomile successfully. Mulch heavily to conserve soil moisture.
Fergus County Soil Profile
Soil Type
Loam
Soil pH
6.4-8
Drainage
Well Drained
Plant Planting Risk Windows
Percentages indicate frost risk at transplant. The 70% safe window means there is a 30% chance of frost after transplant — suitable for cold-hardy crops or gardeners with frost protection. The 90% safe window is best for tender plants.
Soil Compatibility in Fergus County
How your county's soil matches Chamomile's growing requirements.
Soil pH
Your soil pH (6.4–8.0) overlaps with Chamomile's range (5.6–7.5), though not a perfect match.
Soil Texture
The loam soil in Fergus County is excellent for Chamomile — good drainage, moisture retention, and nutrient holding capacity.
Organic Matter
Organic matter is moderate (2.3%). Annual compost additions will help Chamomile.
How to Plant Chamomile
Fall planting: Sow 12 weeks before your first frost date for a fall harvest.
Succession Planting Chamomile
Sow every 6.9 weeks. Last sowing by Jun 22 to harvest before frost.
For a dedicated fall crop, sow by Jun 28.
Plant Water Budget
Water stress score is 8/10 — consider drought-tolerant varieties and mulching
Monthly Watering Guide for Chamomile
Chamomile needs approximately 0.4 inches of water per week (1.7" per month). Here's how your county's rainfall compares month by month.
| Month | Chamomile Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 0.8" | 0" | ❄️ Dormant |
| Feb | — | 0.8" | 0" | ❄️ Dormant |
| Mar | — | 1.1" | 0" | ❄️ Dormant |
| Apr | — | 1.3" | 0" | ❄️ Dormant |
| May | 1.7" | 1.3" | 0.4" | 💧 Light watering |
| Jun | 1.7" | 0.7" | 1" | 🚿 Regular watering |
| Jul | 1.7" | 1.1" | 0.6" | 💧 Light watering |
| Aug | 1.7" | 1.3" | 0.4" | 💧 Light watering |
| Sep | 1.7" | 0.8" | 0.9" | 🚿 Regular watering |
| Oct | — | 1.2" | 0" | ❄️ Dormant |
| Nov | — | 0.8" | 0" | ❄️ Dormant |
| Dec | — | 0.8" | 0" | ❄️ Dormant |
Water needs are for active growing months only (May–Sep in Fergus County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Chamomile Heat Requirements (GDD)
What are Growing Degree Days (GDD)?
Growing Degree Days measure the total warmth your plants receive during the growing season. Think of it as a "heat bank" — every day above 50°F deposits warmth that helps your plants grow.
Each plant needs a certain amount of accumulated heat to mature. If your county provides more GDD than the plant needs, it's a great fit. If it's close, you may want to choose faster-maturing varieties or start seeds indoors to get a head start.
Chamomile Planting Timeline — Fergus County, MT
Chamomile Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | April 8 | Apr 8 – Apr 22 |
| Transplant Outdoors | May 13 | May 13 – May 27 |
| Direct Sow | May 13 | May 13 – Jun 3 |
| Harvest | July 15 | Jul 15 – Sep 23 |
| Fall Sowing | June 28 | Jun 28 – Jul 12 |
Plant 0.5" deep · 8" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | — |
| April | Start Indoors |
| May | Transplant Outdoors Direct Sow |
| June | Direct Sow Fall Sowing |
| July | Fall Sowing Harvest |
| August | Harvest |
| September | Harvest |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
0.4"/week · Natural rainfall sufficient
📅 Days to Maturity
60–90 days
🧪 Soil pH
Needs 5.6–7.5 · Your soil: acceptable
🗺️ USDA Zone
Zone 4a
📆 Growing Season
123 days in Fergus County
Growing Tips for Chamomile in Fergus County
Direct sow Chamomile outdoors after May 20 in Fergus County when soil has warmed and frost danger has passed.
Common pests for Chamomile in this region include aphids and slugs. Use row covers early in the season and inspect plants weekly.
General growing tips
Direct sow on the soil surface as seeds need light. Harvest flowers when petals begin to curl back. Chamomile self-sows freely and improves the health of nearby plants.
Companion Planting
Good Companions
Check more plant combinations with our Companion Planting Checker →
Chamomile in Other Locations
Frequently Asked Questions
When should I plant Chamomile in Fergus County, MT?
Fergus County is in Zone 4a with an average last frost of May 20. Plan your Chamomile planting based on this frost date — see the calendar above for exact timing.
What planting zone is Fergus County, MT?
Fergus County, Montana is in USDA Hardiness Zone 4a. The average last spring frost is May 20 and first fall frost is September 20.
Plan Your Garden with Confidence
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