When to plant Salvia in Clinton County County,
Clinton County County sits in cold Zone 6a. Plant Salvia May 7–May 21 for the single annual harvest; the October 13 first frost closes the window.
When to Plant Salvia in Clinton County, MI
June to-do list for Clinton County, Michigan
A quick June briefing for Clinton County, Michigan gardeners — what's urgent, what's next, and what can wait.
July will be here before you know it — start on
- Starting indoors: salvia
- First harvests: salvia
Salvia splendens is a tender perennial from Brazil grown as a warm-season annual throughout the US. Its vivid, upright flower spikes in brilliant red, purple, and coral are irresistible to hummingbirds, bees, and butterflies. One of the longest-blooming annuals in the landscape — plants bloom from early summer until hard frost with minimal deadheading required.
Clinton County, Michigan is in USDA Zone 6a. The average last spring frost is April 30 and the first fall frost is October 13, giving you a growing season of approximately 166 days.
At an elevation of 519 feet, Clinton County receives approximately 34.1 inches of rainfall annually with predominantly silt loam soil. Summer highs average 84°F, so choose short-season varieties of Salvia to ensure they mature before fall.
Clinton County Soil Profile
Soil Type
Silt Loam
Soil pH
5.9-6.7
Drainage
Well Drained
Salvia 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 Clinton County
How your county's soil matches Salvia's growing requirements.
Soil pH
Your soil pH (5.9–6.7) is within Salvia's preferred range (5.5–7.0).
Soil Texture
The silt loam soil in Clinton County is excellent for Salvia — good drainage, moisture retention, and nutrient holding capacity.
Drainage
Drainage is adequate for Salvia.
Organic Matter
Organic matter is excellent (4.8%) — Salvia will thrive.
How to Plant Salvia
Succession Planting Salvia
Sow every 8 weeks. Last sowing by Jul 15 to harvest before frost.
Salvia Water Budget
Water stress score is 6/10 — consider drought-tolerant varieties and mulching
Monthly Watering Guide for Salvia
Salvia needs approximately 1 inches of water per week (4.3" per month). Here's how your county's rainfall compares month by month.
| Month | Salvia Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 1.4" | 0" | ❄️ Dormant |
| Feb | — | 1.7" | 0" | ❄️ Dormant |
| Mar | — | 2.4" | 0" | ❄️ Dormant |
| Apr | 4.3" | 2.9" | 1.4" | 💧 Light watering |
| May | 4.3" | 3.8" | 0.5" | 💧 Light watering |
| Jun | 4.3" | 4.1" | 0.2" | 💧 Light watering |
| Jul | 4.3" | 3.7" | 0.6" | 💧 Light watering |
| Aug | 4.3" | 3.9" | 0.4" | 💧 Light watering |
| Sep | 4.3" | 3" | 1.3" | 💧 Light watering |
| Oct | 4.3" | 2.7" | 1.6" | 💧 Light watering |
| Nov | — | 2.5" | 0" | ❄️ Dormant |
| Dec | — | 2" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Apr–Oct in Clinton County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Salvia 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.
Salvia Planting Timeline — Clinton County, MI
Salvia Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | February 26 | Feb 26 – Mar 12 |
| Transplant Outdoors | May 7 | May 7 – May 21 |
| Bloom | July 16 | Jul 16 – Oct 22 |
· 12" apart · Rows 18" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | Start Indoors |
| March | Start Indoors |
| April | — |
| May | Transplant Outdoors |
| June | — |
| July | Bloom |
| August | Bloom |
| September | Bloom |
| October | Bloom |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
1"/week · 1-2 times/week
📅 Days to Maturity
70–90 days
🧪 Soil pH
Needs 5.5–7 · Your soil: ideal
🗺️ USDA Zone
Zone 6a
📆 Growing Season
166 days in Clinton County
Growing Tips for Salvia in Clinton County
Direct sow Salvia outdoors after April 30 in Clinton County when soil has warmed and frost danger has passed.
General growing tips
Start indoors 8-10 weeks before last frost; seeds need 65-70°F soil and light to germinate (surface-sow, do not cover). Transplant after last frost when soil has warmed. Salvia is frost-sensitive — even a light frost kills plants. Pinch spent spikes to encourage continued bloom. Tolerates heat and humidity well once established. In zones 9b-11b can be grown as a short-lived perennial.
Companion Planting
Good Companions
Check more plant combinations with our Companion Planting Checker →
Salvia in Other Locations
Frequently Asked Questions
When should I plant Salvia in Clinton County, MI?
Clinton County is in Zone 6a with an average last frost of April 30. Plan your Salvia planting based on this frost date — see the calendar above for exact timing.
What planting zone is Clinton County, MI?
Clinton County, Michigan is in USDA Hardiness Zone 6a. The average last spring frost is April 30 and first fall frost is October 13.
When should I plant Salvia in Clinton County County, ?
In Clinton County County, , plant Salvia after the last frost (around April 30) and before the first frost (around October 13). Best results when soil holds above 50°F.
What growing zone is Clinton County County, for Salvia?
Clinton County County sits in USDA Zone 6a. Salvia grows reliably in zones 2a through 11b, so it's a good fit here.
Can Salvia grow in Clinton County County's climate?
Yes — Salvia grows well in Clinton County County's temperate climate. Clinton County County averages a 166-day frost-free season, with last frost around April 30 and first frost around October 13.
Your Clinton County Garden Planner — Free
A 22-page printable planner built for Clinton 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.