When to plant Feverfew in Mason County, IL
Plant Feverfew in Mason County, between April 22 and May 6 — the only viable window. Zone 6a's short season (182 frost-free days) rules out a fall crop.
When to Plant Feverfew in Mason County, IL
Feverfew is a bushy perennial herb with small daisy-like flowers and aromatic leaves. It has been used traditionally for headache relief and is a cheerful garden plant.
Mason County, Illinois is in USDA Zone 6a. The average last spring frost is April 15 and the first fall frost is October 14, giving you a growing season of approximately 182 days.
At an elevation of 768 feet, Mason County receives approximately 30.4 inches of rainfall annually with predominantly silt loam soil. Summer highs average 86°F, providing good warmth for Feverfew during the growing season.
Mason County Soil Profile
Soil Type
Silt Loam
Soil pH
6.0-7.0
Drainage
Well Drained
Feverfew Planting Timeline — Mason County, IL
Feverfew Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Transplant Outdoors | April 22 | Apr 22 – May 6 |
| Harvest | July 22 | Jul 22 – Oct 7 |
Plant 0.5" deep · 8" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | — |
| April | Transplant Outdoors |
| May | Transplant Outdoors |
| June | — |
| July | Harvest |
| August | Harvest |
| September | Harvest |
| October | Harvest |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
Low — drought tolerant
📅 Days to Maturity
90–120 days
🧪 Soil pH
Needs 6–7 · Your soil: N/A
🗺️ USDA Zone
Zone 6a
📆 Growing Season
182 days in Mason County
Growing Tips for Mason County
Start seeds indoors or direct sow on the soil surface. Deadhead regularly to prevent aggressive self-seeding. Divide clumps every 2-3 years to maintain vigor.
Companion Planting
Good Companions
Check more plant combinations with our Companion Planting Checker →
Feverfew in Other Locations
Frequently Asked Questions
When should I plant Feverfew in Mason County, IL?
Mason County is in Zone 6a with an average last frost of April 15. Plan your Feverfew planting based on this frost date — see the calendar above for exact timing.
What planting zone is Mason County, IL?
Mason County, Illinois is in USDA Hardiness Zone 6a. The average last spring frost is April 15 and first fall frost is October 14.
When should I plant Feverfew in Mason County, IL?
In Mason County, IL, plant Feverfew after the last frost (around April 15) and before the first frost (around October 14). Best results when soil holds above 50°F.
What growing zone is Mason County, IL for Feverfew?
Mason County sits in USDA Zone 6a. Feverfew grows reliably in zones 5a through 9b, so it's a good fit here.
Can Feverfew grow in Mason County's climate?
Yes — Feverfew grows well in Mason County's temperate climate. Mason County averages a 182-day frost-free season, with last frost around April 15 and first frost around October 14.
Your Mason County Garden Planner — Free
A 22-page printable planner built for Mason 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.