When to Plant Cauliflower in Suffolk County, NY
Cauliflower is a cool-season brassica that produces dense white, purple, or green heads called curds. It is more finicky than broccoli but rewards with a mild, nutty flavor.
Suffolk County, New York is in USDA Zone 7a. The average last spring frost is April 15 and the first fall frost is October 31, giving you a growing season of approximately 199 days.
At an elevation of 1,187 feet, Suffolk County receives approximately 41 inches of rainfall annually with predominantly silt loam soil. Summer highs average 90°F, providing good warmth for Cauliflower during the growing season.
Suffolk County Soil Profile
Soil Type
Silt Loam
Soil pH
4.9-6.7
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.
Plant Water Budget
Cauliflower Planting Timeline — Suffolk County, NY
Cauliflower Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | March 11 | Mar 11 – Mar 25 |
| Transplant Outdoors | April 15 | Apr 15 – Apr 29 |
| Direct Sow | April 1 | Apr 1 – Apr 22 |
| Fall Sowing | August 22 | Aug 22 – Sep 5 |
| Harvest | June 10 | Jun 10 – Aug 12 |
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 | — |
| June | Harvest |
| July | Harvest |
| August | Fall Sowing Harvest |
| September | Fall Sowing |
| October | — |
| November | — |
| December | — |
Growing Conditions
Sun
Full Sun (6-8+ hours)
Water
High — keep soil consistently moist
Days to Maturity
55–100 days
Soil pH
6 – 7
USDA Zone
Zone 7a
Growing Season
199 days
Growing Tips for Suffolk County
Start seeds indoors 6 weeks before transplanting. Blanch white varieties by tying outer leaves over the head. Provide consistent moisture and avoid temperature extremes.
Companion Planting
Good Companions
Avoid Planting Near
Level Up Your Garden
Cauliflower in Other Locations
Frequently Asked Questions
When should I plant Cauliflower in Suffolk County, NY?
Suffolk County is in Zone 7a with an average last frost of April 15. Plan your Cauliflower planting based on this frost date — see the calendar above for exact timing.
What planting zone is Suffolk County, NY?
Suffolk County, New York is in USDA Hardiness Zone 7a. The average last spring frost is April 15 and first fall frost is October 31.
Plan Your Garden with Confidence
Get our free Garden Planner — designed to help Suffolk County gardeners in Zone 7a organize planting dates, track what's growing, and never miss a planting window.
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