When to Plant Tomatoes in Defiance County, OH
Tomatoes are the most popular home garden crop, available in thousands of varieties from tiny cherries to massive beefsteaks. They are warm-season plants needing full sun.
Defiance County, Ohio is in USDA Zone 5b. The average last spring frost is April 26 and the first fall frost is October 17, giving you a growing season of approximately 174 days.
At an elevation of 821 feet, Defiance County receives approximately 38.7 inches of rainfall annually with predominantly silt loam soil. Summer highs average 86°F, providing good warmth for Tomatoes during the growing season.
Defiance County Soil Profile
Soil Type
Silt Loam
Soil pH
5.8-6.9
Drainage
Well Drained
Plant 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 Defiance County
How your county's soil matches Tomatoes's growing requirements.
Soil pH
Your soil pH (5.8–6.9) overlaps with Tomatoes's range (6.0–7.0), though not a perfect match.
Soil Texture
The silt loam soil in Defiance County is excellent for Tomatoes — good drainage, moisture retention, and nutrient holding capacity.
Organic Matter
Organic matter is excellent (4.6%) — Tomatoes will thrive.
How to Plant Tomatoes
Succession Planting Tomatoes
Sow every 6.9 weeks. Last sowing by Jul 24 to harvest before frost.
Plant Water Budget
Tomatoes Planting Timeline — Defiance County, OH
Tomatoes Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | March 1 | Mar 1 – Mar 15 |
| Transplant Outdoors | May 10 | May 10 – May 24 |
| Direct Sow | May 3 | May 3 – May 24 |
| Harvest | July 12 | Jul 12 – Sep 20 |
Plant 0.5" deep · 24" apart · Rows 36" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | Start Indoors |
| April | — |
| May | Transplant Outdoors Direct Sow |
| June | — |
| July | Harvest |
| August | Harvest |
| September | Harvest |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
1.2"/week · Only during dry spells
📅 Days to Maturity
60–85 days
🧪 Soil pH
Needs 6–7 · Your soil: acceptable
🗺️ USDA Zone
Zone 5b
📆 Growing Season
174 days in Defiance County
Growing Tips for Tomatoes in Defiance County
Direct sow Tomatoes outdoors after April 26 in Defiance County when soil has warmed and frost danger has passed.
Common pests for Tomatoes 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 6-8 weeks before last frost. Bury transplants deep to encourage rooting along the stem. Provide consistent moisture to prevent blossom end rot and cracking.
Companion Planting
Good Companions
Avoid Planting Near
Level Up Your Garden
Isolate 25 ft between varieties for purity. Use open-pollinated varieties for true-to-type seeds.
Tomatoes in Other Locations
Frequently Asked Questions
When should I plant Tomatoes in Defiance County, OH?
Defiance County is in Zone 5b with an average last frost of April 26. Plan your Tomatoes planting based on this frost date — see the calendar above for exact timing.
What planting zone is Defiance County, OH?
Defiance County, Ohio is in USDA Hardiness Zone 5b. The average last spring frost is April 26 and first fall frost is October 17.
Plan Your Garden with Confidence
Get our free Garden Planner — designed to help Defiance County gardeners in Zone 5b organize planting dates, track what's growing, and never miss a planting window.
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