When to plant Celery in Plano, IL
Plano's spring Celery window runs April 6 through April 27. time plantings around the expected last-frost window for best survival. A second sowing from August 8 to August 22 extends the harvest into fall.
When to Plant Celery in Plano, IL
Your July game plan for Kendall County, Illinois
Each item below is timed to Kendall County, Illinois's frost dates and soil temperatures. Skip nothing, stress about nothing.
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Start harvesting celery
Taste as you pick. The first ripe produce is the best feedback loop you'll get all season.
A few tasks this July that'll pay off in August
- First harvests: celery
- Fall sowing: celery
Celery is a marshland plant that requires consistent moisture and cool temperatures to produce crisp, flavorful stalks. It is a rewarding but demanding garden crop.
Plano, Illinois is in USDA Zone 5b. The average last spring frost is April 20 and the first fall frost is October 17, giving you a growing season of approximately 180 days.
At an elevation of 708 feet, Kendall County receives approximately 38.2 inches of rainfall annually with predominantly silt loam soil. Summer highs average 85°F, providing good warmth for Celery during the growing season.
Plano Soil Profile
Soil Type
Silt Loam
Soil pH
6.1-6.8
Drainage
Well Drained
Celery 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 Plano
How your county's soil matches Celery's growing requirements.
Soil pH
Your soil pH (6.1–6.8) is within Celery's preferred range (6.0–7.0).
Soil Texture
The silt loam soil in Kendall County is excellent for Celery — good drainage, moisture retention, and nutrient holding capacity.
Organic Matter
Organic matter is excellent (4.9%) — Celery will thrive.
How to Plant Celery
Fall planting: Sow 10 weeks before your first frost date for a fall harvest.
Succession Planting Celery
Sow every 9.1 weeks. Last sowing by Jun 19 to harvest before frost.
For a dedicated fall crop, sow by Aug 08.
Celery Water Budget
Monthly Watering Guide for Celery
Celery needs approximately 1.3 inches of water per week (5.6" per month). Here's how your county's rainfall compares month by month.
| Month | Celery Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 1.7" | 0" | ❄️ Dormant |
| Feb | — | 1.7" | 0" | ❄️ Dormant |
| Mar | — | 3" | 0" | ❄️ Dormant |
| Apr | 5.6" | 3.9" | 1.7" | 💧 Light watering |
| May | 5.6" | 4.6" | 1" | 💧 Light watering |
| Jun | 5.6" | 5.3" | 0.3" | 💧 Light watering |
| Jul | 5.6" | 4.1" | 1.5" | 💧 Light watering |
| Aug | 5.6" | 3.4" | 2.2" | 💧 Light watering |
| Sep | 5.6" | 3" | 2.6" | 💧 Light watering |
| Oct | 5.6" | 2.9" | 2.7" | 💧 Light watering |
| Nov | — | 2.9" | 0" | ❄️ Dormant |
| Dec | — | 1.8" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Apr–Oct in Kendall County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Celery 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.
Celery Planting Timeline — Plano, IL
Celery Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | March 16 | Mar 16 – Mar 30 |
| Transplant Outdoors | April 20 | Apr 20 – May 4 |
| Direct Sow | April 6 | Apr 6 – Apr 27 |
| Harvest | July 13 | Jul 13 – Sep 7 |
| Fall Sowing | August 8 | Aug 8 – Aug 22 |
Plant 1" deep · 15" apart · Rows 24" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | Start Indoors |
| April | Transplant Outdoors Direct Sow |
| May | Transplant Outdoors |
| June | — |
| July | Harvest |
| August | Fall Sowing Harvest |
| September | Harvest |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
1.3"/week · 1-2 times/week
📅 Days to Maturity
80–120 days
🧪 Soil pH
Needs 6–7 · Your soil: ideal
🗺️ USDA Zone
Zone 5b
📆 Growing Season
180 days in Kendall County
Growing Tips for Celery in Plano
Direct sow Celery outdoors after April 20 in Kendall County when soil has warmed and frost danger has passed.
Common pests for Celery in this region include carrot rust fly and parsleyworm. Use row covers early in the season and inspect plants weekly.
General growing tips
Start seeds indoors 10-12 weeks before last frost. Keep soil consistently moist and never let it dry out. Blanch stalks by mounding soil or using collars for milder flavor.
Companion Planting
Good Companions
Avoid Planting Near
Check more plant combinations with our Companion Planting Checker →
Celery in Other Locations
When should I plant Celery in Plano, IL?
In Plano, IL, plant Celery after the last frost (around April 20) and before the first frost (around October 17). Best results when soil holds above 50°F.
What growing zone is Plano, IL for Celery?
Plano sits in USDA Zone 5b. Celery grows reliably in zones 2a through 10b, so it's a good fit here.
Can Celery grow in Plano's climate?
Yes — Celery grows well in Plano's temperate climate. Plano averages a 180-day frost-free season, with last frost around April 20 and first frost around October 17.
Your Kendall County Garden Planner — Free
A 22-page printable planner built for Kendall County (Zone 5b). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.