When to Plant Carrots in Grafton County, NH
Carrots are a popular root vegetable available in orange, purple, white, and yellow varieties. They are rich in beta-carotene and have a sweet, earthy flavor.
Grafton County, New Hampshire is in USDA Zone 4b. The average last spring frost is May 12 and the first fall frost is October 7, giving you a growing season of approximately 148 days.
At an elevation of 524 feet, Grafton County receives approximately 44.9 inches of rainfall annually with predominantly silt loam soil. Summer highs average 80°F, so choose short-season varieties of Carrots to ensure they mature before fall.
Grafton County Soil Profile
Soil Type
Silt Loam
Soil pH
5.2-6.3
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
Carrots Planting Timeline — Grafton County, NH
Carrots Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Direct Sow | May 5 | May 5 – May 26 |
| Fall Sowing | July 15 | Jul 15 – Jul 29 |
| Harvest | July 7 | Jul 7 – Aug 11 |
Plant 0.5" deep · 6" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | — |
| April | — |
| May | Direct Sow |
| June | — |
| July | Fall Sowing Harvest |
| August | Harvest |
| September | — |
| October | — |
| November | — |
| December | — |
Growing Conditions
Sun
Full Sun (6-8+ hours)
Water
Moderate — regular watering
Days to Maturity
60–80 days
Soil pH
6 – 6.8
USDA Zone
Zone 4b
Growing Season
148 days
Growing Tips for Grafton County
Sow seeds directly in loose, stone-free soil for straight roots. Keep soil moist until germination which can take 2-3 weeks. Thin seedlings to 2 inches apart.
Companion Planting
Good Companions
Avoid Planting Near
Level Up Your Garden
Isolate 1/2 mile from Queen Anne's Lace (wild carrot). Biennial — requires two seasons.
Carrots in Other Locations
Frequently Asked Questions
When should I plant Carrots in Grafton County, NH?
Grafton County is in Zone 4b with an average last frost of May 12. Plan your Carrots planting based on this frost date — see the calendar above for exact timing.
What planting zone is Grafton County, NH?
Grafton County, New Hampshire is in USDA Hardiness Zone 4b. The average last spring frost is May 12 and first fall frost is October 7.
Plan Your Garden with Confidence
Get our free Garden Planner — designed to help Grafton County gardeners in Zone 4b organize planting dates, track what's growing, and never miss a planting window.
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