When to plant Thyme in Riley County, KS
Plant Thyme in Riley County, between April 24 and May 8 — the only viable window. Zone 6b's short season (184 frost-free days) rules out a fall crop.
When to Plant Thyme in Riley County, KS
Thyme is a low-growing perennial herb with tiny, aromatic leaves and a warm, earthy flavor. It is one of the most versatile culinary and medicinal herbs.
Riley County, Kansas is in USDA Zone 6b. The average last spring frost is April 17 and the first fall frost is October 18, giving you a growing season of approximately 184 days.
At an elevation of 551 feet, Riley County receives approximately 32.9 inches of rainfall annually with predominantly loam soil. Summer highs average 85°F, providing good warmth for Thyme during the growing season.
Riley County Soil Profile
Soil Type
Loam
Soil pH
6.8-7.7
Drainage
Well Drained
Monthly Watering Guide for Thyme
Thyme needs approximately 1 inches of water per week (4.3" per month). Here's how your county's rainfall compares month by month.
| Month | Thyme Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 1" | 0" | ❄️ Dormant |
| Feb | — | 1.2" | 0" | ❄️ Dormant |
| Mar | — | 2.3" | 0" | ❄️ Dormant |
| Apr | 4.3" | 3.1" | 1.2" | 💧 Light watering |
| May | 4.3" | 4.3" | 0" | ✅ Rainfall sufficient |
| Jun | 4.3" | 5.5" | 0" | ✅ Rainfall sufficient |
| Jul | 4.3" | 4" | 0.3" | 💧 Light watering |
| Aug | 4.3" | 4" | 0.3" | 💧 Light watering |
| Sep | 4.3" | 3.1" | 1.2" | 💧 Light watering |
| Oct | 4.3" | 2.3" | 2" | 💧 Light watering |
| Nov | — | 1.2" | 0" | ❄️ Dormant |
| Dec | — | 0.9" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Apr–Oct in Riley County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Thyme Planting Timeline — Riley County, KS
Thyme Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Transplant Outdoors | April 24 | Apr 24 – May 8 |
| Harvest | July 3 | Jul 3 – Sep 4 |
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 | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
Low — drought tolerant
📅 Days to Maturity
70–90 days
🧪 Soil pH
Needs 6–8 · Your soil: N/A
🗺️ USDA Zone
Zone 6b
📆 Growing Season
184 days in Riley County
Growing Tips for Riley County
Start from seed, cuttings, or divisions. Plant in well-drained, lean soil. Prune lightly after flowering. Replace plants every 3-4 years when they become woody.
Companion Planting
Good Companions
Check more plant combinations with our Companion Planting Checker →
Thyme in Other Locations
Frequently Asked Questions
When should I plant Thyme in Riley County, KS?
Riley County is in Zone 6b with an average last frost of April 17. Plan your Thyme planting based on this frost date — see the calendar above for exact timing.
What planting zone is Riley County, KS?
Riley County, Kansas is in USDA Hardiness Zone 6b. The average last spring frost is April 17 and first fall frost is October 18.
When should I plant Thyme in Riley County, KS?
In Riley County, KS, plant Thyme after the last frost (around April 17) and before the first frost (around October 18). Best results when soil holds above 50°F.
What growing zone is Riley County, KS for Thyme?
Riley County sits in USDA Zone 6b. Thyme grows reliably in zones 4a through 9b, so it's a good fit here.
Can Thyme grow in Riley County's climate?
Yes — Thyme grows well in Riley County's temperate climate. Riley County averages a 184-day frost-free season, with last frost around April 17 and first frost around October 18.
Your Riley County Garden Planner — Free
A 22-page printable planner built for Riley County (Zone 6b). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.