When to Plant Romanesco in Carroll County, MD
Romanesco is a stunning brassica with a lime-green head composed of fractal-patterned spiraling florets. It has a nuttier, milder flavor than cauliflower.
Carroll County, Maryland is in USDA Zone 6b. The average last spring frost is April 17 and the first fall frost is October 26, giving you a growing season of approximately 192 days.
At an elevation of 715 feet, Carroll County receives approximately 42.1 inches of rainfall annually with predominantly silt loam soil. Summer highs average 87°F, providing good warmth for Romanesco during the growing season.
Carroll County Soil Profile
Soil Type
Silt Loam
Soil pH
5.6-6.5
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.
Plant Water Budget
Romanesco Planting Timeline — Carroll County, MD
Romanesco Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | March 13 | Mar 13 – Mar 27 |
| Transplant Outdoors | April 17 | Apr 17 – May 1 |
| Direct Sow | April 3 | Apr 3 – Apr 24 |
| Fall Sowing | August 17 | Aug 17 – Aug 31 |
| Harvest | July 3 | Jul 3 – Aug 14 |
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 | — |
| October | — |
| November | — |
| December | — |
Growing Conditions
Sun
Full Sun (6-8+ hours)
Water
Moderate — regular watering
Days to Maturity
75–100 days
Soil pH
6 – 7
USDA Zone
Zone 6b
Growing Season
192 days
Growing Tips for Carroll County
Start seeds indoors 5-7 weeks before transplanting. Provide consistent moisture and avoid temperature stress. Harvest when head is fully formed but before florets begin to separate.
Companion Planting
Good Companions
Avoid Planting Near
Level Up Your Garden
Romanesco in Other Locations
Frequently Asked Questions
When should I plant Romanesco in Carroll County, MD?
Carroll County is in Zone 6b with an average last frost of April 17. Plan your Romanesco planting based on this frost date — see the calendar above for exact timing.
What planting zone is Carroll County, MD?
Carroll County, Maryland is in USDA Hardiness Zone 6b. The average last spring frost is April 17 and first fall frost is October 26.
Plan Your Garden with Confidence
Get our free Garden Planner — designed to help Carroll County gardeners in Zone 6b organize planting dates, track what's growing, and never miss a planting window.
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