When to plant Salvia in Woodbury County County,
Plant Salvia in Woodbury County County, between May 3 and May 17 — the only viable window. Zone 5a's short season (163 frost-free days) rules out a fall crop.
When to Plant Salvia in Woodbury County, IA
June in Woodbury County, Iowa — your action list
If you only do a handful of things in the garden this June, make it these. They're sequenced around your zone's frost timing.
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Sow salvia in trays indoors
You're about 16 weeks out from your last frost — the perfect window to get these germinating indoors.
Get ahead of July
- 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.
Woodbury County, Iowa is in USDA Zone 5a. The average last spring frost is April 26 and the first fall frost is October 6, giving you a growing season of approximately 163 days.
At an elevation of 1,388 feet, Woodbury County receives approximately 40.2 inches of rainfall annually with predominantly silt loam soil. Summer highs average 80°F, so choose short-season varieties of Salvia to ensure they mature before fall.
Woodbury County Soil Profile
Soil Type
Silt Loam
Soil pH
5.8-6.8
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 Woodbury County
How your county's soil matches Salvia's growing requirements.
Soil pH
Your soil pH (5.8–6.8) is within Salvia's preferred range (5.5–7.0).
Soil Texture
The silt loam soil in Woodbury 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 (4.1%) — Salvia will thrive.
How to Plant Salvia
Succession Planting Salvia
Sow every 8 weeks. Last sowing by Jul 08 to harvest before frost.
Salvia Water Budget
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 | — | 1.5" | 0" | ❄️ Dormant |
| Feb | — | 1.9" | 0" | ❄️ Dormant |
| Mar | — | 2.8" | 0" | ❄️ Dormant |
| Apr | 4.3" | 3.5" | 0.8" | 💧 Light watering |
| May | 4.3" | 4.4" | 0" | ✅ Rainfall sufficient |
| Jun | 4.3" | 5.5" | 0" | ✅ Rainfall sufficient |
| Jul | 4.3" | 4.5" | 0" | ✅ Rainfall sufficient |
| Aug | 4.3" | 4.9" | 0" | ✅ Rainfall sufficient |
| Sep | 4.3" | 3.3" | 1" | 💧 Light watering |
| Oct | 4.3" | 3.4" | 0.9" | 💧 Light watering |
| Nov | — | 2.5" | 0" | ❄️ Dormant |
| Dec | — | 2.2" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Apr–Oct in Woodbury 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 — Woodbury County, IA
Salvia Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | February 22 | Feb 22 – Mar 8 |
| Transplant Outdoors | May 3 | May 3 – May 17 |
| Bloom | July 12 | Jul 12 – Oct 4 |
· 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 · Only during dry spells
📅 Days to Maturity
70–90 days
🧪 Soil pH
Needs 5.5–7 · Your soil: ideal
🗺️ USDA Zone
Zone 5a
📆 Growing Season
163 days in Woodbury County
Growing Tips for Salvia in Woodbury County
Direct sow Salvia outdoors after April 26 in Woodbury 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 Woodbury County, IA?
Woodbury County is in Zone 5a with an average last frost of April 26. Plan your Salvia planting based on this frost date — see the calendar above for exact timing.
What planting zone is Woodbury County, IA?
Woodbury County, Iowa is in USDA Hardiness Zone 5a. The average last spring frost is April 26 and first fall frost is October 6.
When should I plant Salvia in Woodbury County County, ?
In Woodbury County County, , plant Salvia after the last frost (around April 26) and before the first frost (around October 6). Best results when soil holds above 50°F.
What growing zone is Woodbury County County, for Salvia?
Woodbury County County sits in USDA Zone 5a. Salvia grows reliably in zones 2a through 11b, so it's a good fit here.
Can Salvia grow in Woodbury County County's climate?
Yes — Salvia grows well in Woodbury County County's temperate climate. Woodbury County County averages a 163-day frost-free season, with last frost around April 26 and first frost around October 6.
Your Woodbury County Garden Planner — Free
A 22-page printable planner built for Woodbury County (Zone 5a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.