When to plant Petunia in Crawford County, IL
In Crawford County, Petunia is a spring-only crop. Plant April 21–May 5 once soil hits 50°F.
When to Plant Petunia in Crawford County, IL
June in the garden — Crawford County, Illinois
We've pulled the most time-sensitive tasks for Crawford County, Illinois this June and put them front and centre. Tackle them in order.
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Get petunia seeds going inside
Label every cell. You will absolutely forget which is which otherwise.
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It's harvest week for petunia
If you can't use it all right away, check the food-preservation section of your planner.
July prep starts now
- First harvests: petunia
Petunias (Petunia x hybrida) are warm-season tender annuals prized for their prolific, trumpet-shaped blooms in nearly every color. They perform from hanging baskets to garden borders and bloom continuously from late spring until frost, provided spent flowers are removed regularly.
Crawford County, Illinois is in USDA Zone 6b. The average last spring frost is April 14 and the first fall frost is October 23, giving you a growing season of approximately 192 days.
At an elevation of 555 feet, Crawford County receives approximately 33 inches of rainfall annually with predominantly silt loam soil. Summer highs average 90°F, providing good warmth for Petunia during the growing season.
Crawford County Soil Profile
Soil Type
Silt Loam
Soil pH
6.3-7
Drainage
Well Drained
Petunia 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 Crawford County
How your county's soil matches Petunia's growing requirements.
Soil pH
Your soil pH (6.3–7.0) is within Petunia's preferred range (6.0–7.0).
Soil Texture
The silt loam soil in Crawford County is excellent for Petunia — good drainage, moisture retention, and nutrient holding capacity.
Organic Matter
Organic matter is moderate (3.9%). Annual compost additions will help Petunia.
How to Plant Petunia
Succession Planting Petunia
Sow every 8 weeks. Last sowing by Jul 25 to harvest before frost.
Petunia Water Budget
Water stress score is 6/10 — consider drought-tolerant varieties and mulching
Monthly Watering Guide for Petunia
Petunia needs approximately 1 inches of water per week (4.3" per month). Here's how your county's rainfall compares month by month.
| Month | Petunia Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 1.6" | 0" | ❄️ Dormant |
| Feb | — | 1.4" | 0" | ❄️ Dormant |
| Mar | — | 2.1" | 0" | ❄️ Dormant |
| Apr | 4.3" | 3.1" | 1.2" | 💧 Light watering |
| May | 4.3" | 3.7" | 0.6" | 💧 Light watering |
| Jun | 4.3" | 3.8" | 0.5" | 💧 Light watering |
| Jul | 4.3" | 3.7" | 0.6" | 💧 Light watering |
| Aug | 4.3" | 4" | 0.3" | 💧 Light watering |
| Sep | 4.3" | 2.7" | 1.6" | 💧 Light watering |
| Oct | 4.3" | 2.5" | 1.8" | 💧 Light watering |
| Nov | — | 2.7" | 0" | ❄️ Dormant |
| Dec | — | 1.6" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Apr–Oct in Crawford County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Petunia 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.
Petunia Planting Timeline — Crawford County, IL
Petunia Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | February 17 | Feb 17 – Mar 3 |
| Transplant Outdoors | April 21 | Apr 21 – May 5 |
| Bloom | June 30 | Jun 30 – Oct 13 |
· 12" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | Start Indoors |
| March | Start Indoors |
| April | Transplant Outdoors |
| May | Transplant Outdoors |
| June | Bloom |
| 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 6–7 · Your soil: ideal
🗺️ USDA Zone
Zone 6b
📆 Growing Season
192 days in Crawford County
Growing Tips for Petunia in Crawford County
Direct sow Petunia outdoors after April 14 in Crawford County when soil has warmed and frost danger has passed.
Common pests for Petunia in this region include tomato hornworm and aphids. Use row covers early in the season and inspect plants weekly.
General growing tips
Start seeds indoors 8–10 weeks before last frost; seeds need light to germinate — press onto moist mix surface, do not cover. Transplant after last frost once nights stay above 50°F. Pinch back leggy plants mid-summer to encourage bushy re-bloom. Wave/spreading types tolerate light shade but bloom less. Feed every 2 weeks with balanced fertilizer once established.
Companion Planting
Good Companions
Check more plant combinations with our Companion Planting Checker →
Petunia in Other Locations
Frequently Asked Questions
When should I plant Petunia in Crawford County, IL?
Crawford County is in Zone 6b with an average last frost of April 14. Plan your Petunia planting based on this frost date — see the calendar above for exact timing.
What planting zone is Crawford County, IL?
Crawford County, Illinois is in USDA Hardiness Zone 6b. The average last spring frost is April 14 and first fall frost is October 23.
When should I plant Petunia in Crawford County, IL?
In Crawford County, IL, plant Petunia after the last frost (around April 14) and before the first frost (around October 23). Best results when soil holds above 50°F.
What growing zone is Crawford County, IL for Petunia?
Crawford County sits in USDA Zone 6b. Petunia grows reliably in zones 2a through 11b, so it's a good fit here.
Can Petunia grow in Crawford County's climate?
Yes — Petunia grows well in Crawford County's temperate climate. Crawford County averages a 192-day frost-free season, with last frost around April 14 and first frost around October 23.
Your Crawford County Garden Planner — Free
A 22-page printable planner built for Crawford 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.