When to Plant Echinacea in Logan County, ND
Echinacea (purple coneflower) is a native prairie perennial valued for its immune-supporting properties and beautiful daisy-like flowers that attract pollinators.
Logan County, North Dakota is in USDA Zone 4a. The average last spring frost is May 13 and the first fall frost is September 28, giving you a growing season of approximately 138 days.
At an elevation of 1,073 feet, Logan County receives approximately 25.2 inches of rainfall annually with predominantly loam soil. Summer highs average 82°F, so choose short-season varieties of Echinacea to ensure they mature before fall.
Logan County Soil Profile
Soil Type
Loam
Soil pH
6.5-7.7
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 Logan County
How your county's soil matches Echinacea's growing requirements.
Soil pH
Your soil pH (6.5–7.7) is more alkaline than Echinacea prefers (6.0–7.0). Add sulfur or peat moss to lower pH.
Soil Texture
The loam soil in Logan County is excellent for Echinacea — good drainage, moisture retention, and nutrient holding capacity.
Organic Matter
Organic matter is excellent (4.1%) — Echinacea will thrive.
How to Plant Echinacea
Plant Water Budget
Water stress score is 6/10 — consider drought-tolerant varieties and mulching
Monthly Watering Guide for Echinacea
Echinacea needs approximately 0.5 inches of water per week (2.2" per month). Here's how your county's rainfall compares month by month.
| Month | Echinacea Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 0.6" | 0" | ❄️ Dormant |
| Feb | — | 0.8" | 0" | ❄️ Dormant |
| Mar | — | 1.5" | 0" | ❄️ Dormant |
| Apr | — | 2.8" | 0" | ❄️ Dormant |
| May | 2.2" | 3.8" | 0" | ✅ Rainfall sufficient |
| Jun | 2.2" | 3.9" | 0" | ✅ Rainfall sufficient |
| Jul | 2.2" | 3.3" | 0" | ✅ Rainfall sufficient |
| Aug | 2.2" | 2.9" | 0" | ✅ Rainfall sufficient |
| Sep | 2.2" | 2.5" | 0" | ✅ Rainfall sufficient |
| Oct | — | 1.5" | 0" | ❄️ Dormant |
| Nov | — | 0.9" | 0" | ❄️ Dormant |
| Dec | — | 0.6" | 0" | ❄️ Dormant |
Water needs are for active growing months only (May–Sep in Logan County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Echinacea 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.
Echinacea Planting Timeline — Logan County, ND
Echinacea Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Transplant Outdoors | May 20 | May 20 – Jun 3 |
| Harvest | September 23 | Sep 23 – Oct 14 |
Plant 0.5" deep · 8" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | — |
| April | — |
| May | Transplant Outdoors |
| June | Transplant Outdoors |
| July | — |
| August | — |
| September | Harvest |
| October | Harvest |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
0.5"/week · Natural rainfall sufficient
📅 Days to Maturity
120–180 days
🧪 Soil pH
Needs 6–7 · Your soil: too_alkaline
🗺️ USDA Zone
Zone 4a
📆 Growing Season
138 days in Logan County
Growing Tips for Echinacea in Logan County
Direct sow Echinacea outdoors after May 13 in Logan County when soil has warmed and frost danger has passed.
Your 138.0-day growing season in Logan County is tight for Echinacea (120.0-180.0 days to maturity). Start indoors and choose early-maturing varieties.
Common pests for Echinacea in this region include aphids and slugs. Use row covers early in the season and inspect plants weekly.
General growing tips
Start seeds indoors 8-10 weeks before last frost or direct sow in fall for spring germination. Seeds need cold stratification. Deadhead to prolong blooming or leave seed heads for birds.
Companion Planting
Good Companions
Check more plant combinations with our Companion Planting Checker →
Echinacea in Other Locations
Frequently Asked Questions
When should I plant Echinacea in Logan County, ND?
Logan County is in Zone 4a with an average last frost of May 13. Plan your Echinacea planting based on this frost date — see the calendar above for exact timing.
What planting zone is Logan County, ND?
Logan County, North Dakota is in USDA Hardiness Zone 4a. The average last spring frost is May 13 and first fall frost is September 28.
Plan Your Garden with Confidence
Get our free Garden Planner — designed to help Logan County gardeners in Zone 4a organize planting dates, track what's growing, and never miss a planting window.
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