When to plant Chamomile in Boundary County, ID
In Boundary County, plant Chamomile in spring between April 26 and May 17, once soil temps hold above 50°F. Boundary County's last frost averages May 10, so time plantings around the expected last-frost window for best survival. For a fall crop, sow between July 14 and July 28 — roughly 60–90 days before the first frost on September 22.
When to Plant Chamomile in Boundary County, ID
What to do in July
Welcome to July in Zone 6a. These are the moves that will have the biggest impact on your growing season.
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Harvest chamomile as they ripen
Taste as you pick. The first ripe produce is the best feedback loop you'll get all season.
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Direct-sow chamomile for cool weather
Your first frost is about 7 weeks away — plenty of time for these to mature.
August prep starts now
- First harvests: chamomile
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.
Boundary County, Idaho is in USDA Zone 6a. The average last spring frost is May 10 and the first fall frost is September 22, giving you a growing season of approximately 135 days.
At an elevation of 5,105 feet, Boundary County receives approximately 21.1 inches of rainfall annually with predominantly loam soil. Summer highs average 87°F, providing good warmth for Chamomile during the growing season.
Boundary County Soil Profile
Soil Type
Loam
Soil pH
6.7-8.3
Drainage
Well Drained
Chamomile 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 Boundary County
How your county's soil matches Chamomile's growing requirements.
Soil pH
Your soil pH (6.7–8.3) overlaps with Chamomile's range (5.6–7.5), though not a perfect match.
Soil Texture
The loam soil in Boundary 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 10 weeks before your first frost date for a fall harvest.
Succession Planting Chamomile
Sow every 6.9 weeks. Last sowing by Jun 24 to harvest before frost.
For a dedicated fall crop, sow by Jul 14.
Chamomile Water Budget
Water stress score is 6/10 — 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 | — | 1.6" | 0" | ❄️ Dormant |
| Feb | — | 1.2" | 0" | ❄️ Dormant |
| Mar | — | 1.9" | 0" | ❄️ Dormant |
| Apr | — | 2" | 0" | ❄️ Dormant |
| May | 1.7" | 2.7" | 0" | ✅ Rainfall sufficient |
| Jun | 1.7" | 1.6" | 0.1" | 💧 Light watering |
| Jul | 1.7" | 1.8" | 0" | ✅ Rainfall sufficient |
| Aug | 1.7" | 1.9" | 0" | ✅ Rainfall sufficient |
| Sep | 1.7" | 1.6" | 0.1" | 💧 Light watering |
| Oct | — | 2.1" | 0" | ❄️ Dormant |
| Nov | — | 1.5" | 0" | ❄️ Dormant |
| Dec | — | 1.3" | 0" | ❄️ Dormant |
Water needs are for active growing months only (May–Sep in Boundary 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 — Boundary County, ID
Chamomile Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | April 5 | Apr 5 – Apr 19 |
| Transplant Outdoors | May 3 | May 3 – May 17 |
| Direct Sow | April 26 | Apr 26 – May 17 |
| Harvest | July 5 | Jul 5 – Sep 13 |
| Fall Sowing | July 14 | Jul 14 – Jul 28 |
Plant 0.5" deep · 8" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | — |
| April | Start Indoors Direct Sow |
| May | Transplant Outdoors Direct Sow |
| June | — |
| 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 6a
📆 Growing Season
135 days in Boundary County
Growing Tips for Chamomile in Boundary County
Direct sow Chamomile outdoors after May 10 in Boundary 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 Boundary County, ID?
Boundary County is in Zone 6a with an average last frost of May 10. Plan your Chamomile planting based on this frost date — see the calendar above for exact timing.
What planting zone is Boundary County, ID?
Boundary County, Idaho is in USDA Hardiness Zone 6a. The average last spring frost is May 10 and first fall frost is September 22.
When should I plant Chamomile in Boundary County, ID?
In Boundary County, ID, plant Chamomile after the last frost (around May 10) and before the first frost (around September 22). Best results when soil holds above 50°F.
What growing zone is Boundary County, ID for Chamomile?
Boundary County sits in USDA Zone 6a. Chamomile grows reliably in zones 3a through 9b, so it's a good fit here.
Can Chamomile grow in Boundary County's climate?
Yes — Chamomile grows well in Boundary County's temperate climate. Boundary County averages a 135-day frost-free season, with last frost around May 10 and first frost around September 22.
Your Boundary County Garden Planner — Free
A 22-page printable planner built for Boundary County (Zone 6a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.