When to Plant Cardoon in Cape May County, NJ
Your May game plan for Cape May County, New Jersey
May rewards gardeners who work with the weather, not against it. Here's how to stay in step this month in Cape May County, New Jersey.
Cardoon is a large thistle relative of the artichoke, grown for its edible leaf stalks. It has dramatic silvery foliage and makes a striking ornamental as well.
Cape May County, New Jersey is in USDA Zone 7b. The average last spring frost is March 29 and the first fall frost is November 11, giving you a growing season of approximately 227 days.
At an elevation of 928 feet, Cape May County receives approximately 44.7 inches of rainfall annually with predominantly silt loam soil. Summer highs average 94°F, providing good warmth for Cardoon during the growing season.
Cape May County Soil Profile
Soil Type
Silt Loam
Soil pH
4.9-6.5
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 Cape May County
How your county's soil matches Cardoon's growing requirements.
Soil pH
Your soil pH (4.9–6.5) is more acidic than Cardoon prefers (6.0–7.5). Add garden lime to raise pH.
Soil Texture
The silt loam soil in Cape May County is excellent for Cardoon — good drainage, moisture retention, and nutrient holding capacity.
Drainage
Drainage is adequate for Cardoon.
Organic Matter
Organic matter is moderate (3.1%). Annual compost additions will help Cardoon.
How to Plant Cardoon
Plant Water Budget
Monthly Watering Guide for Cardoon
Cardoon needs approximately 1 inches of water per week (4.3" per month). Here's how your county's rainfall compares month by month.
| Month | Cardoon Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 2.9" | 0" | ❄️ Dormant |
| Feb | — | 2.9" | 0" | ❄️ Dormant |
| Mar | 4.3" | 3.5" | 0.8" | 💧 Light watering |
| Apr | 4.3" | 4.2" | 0.1" | 💧 Light watering |
| May | 4.3" | 4.2" | 0.1" | 💧 Light watering |
| Jun | 4.3" | 4.2" | 0.1" | 💧 Light watering |
| Jul | 4.3" | 3.8" | 0.5" | 💧 Light watering |
| Aug | 4.3" | 4.5" | 0" | ✅ Rainfall sufficient |
| Sep | 4.3" | 4.1" | 0.2" | 💧 Light watering |
| Oct | 4.3" | 3.7" | 0.6" | 💧 Light watering |
| Nov | 4.3" | 3.2" | 1.1" | 💧 Light watering |
| Dec | — | 3.4" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Mar–Nov in Cape May County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Cardoon 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.
Cardoon Planting Timeline — Cape May County, NJ
Cardoon Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Transplant Outdoors | April 12 | Apr 12 – Apr 26 |
| Harvest | August 16 | Aug 16 – Sep 27 |
Plant 1" deep · 30" apart · Rows 42" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | — |
| April | Transplant Outdoors |
| May | — |
| June | — |
| July | — |
| August | Harvest |
| September | Harvest |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
1"/week · Natural rainfall sufficient
📅 Days to Maturity
120–150 days
🧪 Soil pH
Needs 6–7.5 · Your soil: too_acidic
🗺️ USDA Zone
Zone 7b
📆 Growing Season
227 days in Cape May County
Growing Tips for Cardoon in Cape May County
Direct sow Cardoon outdoors after March 29 in Cape May County when soil has warmed and frost danger has passed.
Common pests for Cardoon in this region include aphids and slugs. Use row covers early in the season and inspect plants weekly.
General growing tips
Blanch stalks by wrapping with cardboard or tying leaves together 3-4 weeks before harvest. Provide deep, rich soil and consistent moisture. Protect from hard frost.
Companion Planting
Good Companions
Avoid Planting Near
Check more plant combinations with our Companion Planting Checker →
Cardoon in Other Locations
Frequently Asked Questions
When should I plant Cardoon in Cape May County, NJ?
Cape May County is in Zone 7b with an average last frost of March 29. Plan your Cardoon planting based on this frost date — see the calendar above for exact timing.
What planting zone is Cape May County, NJ?
Cape May County, New Jersey is in USDA Hardiness Zone 7b. The average last spring frost is March 29 and first fall frost is November 11.
Your Cape May County Garden Planner — Free
A 24-page printable planner built for Cape May County (Zone 7b). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.