When to Plant Eggplant in Salem County, NJ
Eggplant is a heat-loving solanaceous crop that produces glossy fruits in purple, white, or striped varieties. It requires long, warm growing seasons for best production.
Salem County, New Jersey is in USDA Zone 7a. The average last spring frost is April 6 and the first fall frost is November 1, giving you a growing season of approximately 209 days.
At an elevation of 1,061 feet, Salem County receives approximately 38.9 inches of rainfall annually with predominantly silt loam soil. Summer highs average 88°F, providing good warmth for Eggplant during the growing season.
Salem County Soil Profile
Soil Type
Silt Loam
Soil pH
4.9-6.4
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 Salem County
How your county's soil matches Eggplant's growing requirements.
Soil pH
Your soil pH (4.9–6.4) overlaps with Eggplant's range (5.5–7.0), though not a perfect match.
Soil Texture
The silt loam soil in Salem County is excellent for Eggplant — good drainage, moisture retention, and nutrient holding capacity.
Drainage
Drainage is adequate for Eggplant.
Organic Matter
Organic matter is moderate (3.4%). Annual compost additions will help Eggplant.
How to Plant Eggplant
Succession Planting Eggplant
Sow every 7.4 weeks. Last sowing by Aug 08 to harvest before frost.
Plant Water Budget
Monthly Watering Guide for Eggplant
Eggplant needs approximately 1.1 inches of water per week (4.8" per month). Here's how your county's rainfall compares month by month.
| Month | Eggplant Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 2.7" | 0" | ❄️ Dormant |
| Feb | — | 2.8" | 0" | ❄️ Dormant |
| Mar | — | 3.1" | 0" | ❄️ Dormant |
| Apr | 4.8" | 3.8" | 1" | 💧 Light watering |
| May | 4.8" | 3.3" | 1.5" | 💧 Light watering |
| Jun | 4.8" | 3.8" | 1" | 💧 Light watering |
| Jul | 4.8" | 3.8" | 1" | 💧 Light watering |
| Aug | 4.8" | 3.6" | 1.2" | 💧 Light watering |
| Sep | 4.8" | 3.6" | 1.2" | 💧 Light watering |
| Oct | 4.8" | 2.9" | 1.9" | 💧 Light watering |
| Nov | 4.8" | 2.5" | 2.3" | 💧 Light watering |
| Dec | — | 3" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Apr–Nov in Salem County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Eggplant 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.
Eggplant Planting Timeline — Salem County, NJ
Eggplant Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | February 2 | Feb 2 – Feb 16 |
| Transplant Outdoors | April 20 | Apr 20 – May 4 |
| Direct Sow | April 13 | Apr 13 – May 4 |
| Harvest | June 29 | Jun 29 – Aug 31 |
Plant 1" deep · 30" apart · Rows 42" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | Start Indoors |
| March | — |
| April | Transplant Outdoors Direct Sow |
| May | Transplant Outdoors Direct Sow |
| June | Harvest |
| July | Harvest |
| August | Harvest |
| September | — |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
1.1"/week · Natural rainfall sufficient
📅 Days to Maturity
65–85 days
🧪 Soil pH
Needs 5.5–7 · Your soil: acceptable
🗺️ USDA Zone
Zone 7a
📆 Growing Season
209 days in Salem County
Growing Tips for Eggplant in Salem County
Direct sow Eggplant outdoors after April 06 in Salem County when soil has warmed and frost danger has passed.
Common pests for Eggplant 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. Transplant only after nighttime temperatures stay above 55F. Mulch to retain moisture and warmth around roots.
Companion Planting
Good Companions
Avoid Planting Near
Check more plant combinations with our Companion Planting Checker →
Eggplant in Other Locations
Frequently Asked Questions
When should I plant Eggplant in Salem County, NJ?
Salem County is in Zone 7a with an average last frost of April 6. Plan your Eggplant planting based on this frost date — see the calendar above for exact timing.
What planting zone is Salem County, NJ?
Salem County, New Jersey is in USDA Hardiness Zone 7a. The average last spring frost is April 6 and first fall frost is November 1.
Plan Your Garden with Confidence
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