When to Plant Brussels Sprouts in Putnam County, NY
May in Putnam County, New York — your action list
May rewards gardeners who work with the weather, not against it. Here's how to stay in step this month in Putnam County, New York.
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Get brussels sprouts seeds going inside
A seed-starting mix and a sunny window (or a grow light) are all you need. Keep soil warm — around 70°F — for fast germination.
Brussels sprouts are a cold-hardy brassica that produces miniature cabbage-like heads along a tall stalk. Flavor improves after a light frost.
Putnam County, New York is in USDA Zone 6b. The average last spring frost is April 10 and the first fall frost is November 1, giving you a growing season of approximately 205 days.
At an elevation of 722 feet, Putnam County receives approximately 40.4 inches of rainfall annually with predominantly silt loam soil. Summer highs average 89°F, providing good warmth for Brussels Sprouts during the growing season.
Putnam County Soil Profile
Soil Type
Silt Loam
Soil pH
5.1-6.3
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.
Soil Compatibility in Putnam County
How your county's soil matches Brussels Sprouts's growing requirements.
Soil pH
Your soil pH (5.1–6.3) is more acidic than Brussels Sprouts prefers (6.0–7.5). Add garden lime to raise pH.
Soil Texture
The silt loam soil in Putnam County is excellent for Brussels Sprouts — good drainage, moisture retention, and nutrient holding capacity.
Organic Matter
Organic matter is moderate (3.6%). Annual compost additions will help Brussels Sprouts.
How to Plant Brussels Sprouts
Fall planting: Sow 10 weeks before your first frost date for a fall harvest.
Plant Water Budget
Monthly Watering Guide for Brussels Sprouts
Brussels Sprouts needs approximately 0.9 inches of water per week (3.9" per month). Here's how your county's rainfall compares month by month.
| Month | Brussels Sprouts Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 3.1" | 0" | ❄️ Dormant |
| Feb | — | 2.6" | 0" | ❄️ Dormant |
| Mar | — | 3.6" | 0" | ❄️ Dormant |
| Apr | 3.9" | 3.2" | 0.7" | 💧 Light watering |
| May | 3.9" | 3.9" | 0" | ✅ Rainfall sufficient |
| Jun | 3.9" | 3.7" | 0.2" | 💧 Light watering |
| Jul | 3.9" | 4" | 0" | ✅ Rainfall sufficient |
| Aug | 3.9" | 3.2" | 0.7" | 💧 Light watering |
| Sep | 3.9" | 3.3" | 0.6" | 💧 Light watering |
| Oct | 3.9" | 3.6" | 0.3" | 💧 Light watering |
| Nov | 3.9" | 3.4" | 0.5" | 💧 Light watering |
| Dec | — | 2.8" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Apr–Nov in Putnam County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Brussels Sprouts 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.
Brussels Sprouts Planting Timeline — Putnam County, NY
Brussels Sprouts Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | March 6 | Mar 6 – Mar 20 |
| Transplant Outdoors | April 10 | Apr 10 – Apr 24 |
| Direct Sow | March 27 | Mar 27 – Apr 17 |
| Harvest | July 10 | Jul 10 – Sep 4 |
| Fall Sowing | August 23 | Aug 23 – Sep 6 |
Plant 1" deep · 15" apart · Rows 24" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | Start Indoors Direct Sow |
| April | Transplant Outdoors Direct Sow |
| May | — |
| June | — |
| July | Harvest |
| August | Fall Sowing Harvest |
| September | Fall Sowing Harvest |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
0.9"/week · Only during dry spells
📅 Days to Maturity
90–130 days
🧪 Soil pH
Needs 6–7.5 · Your soil: too_acidic
🗺️ USDA Zone
Zone 6b
📆 Growing Season
205 days in Putnam County
Growing Tips for Brussels Sprouts in Putnam County
Direct sow Brussels Sprouts outdoors after April 10 in Putnam County when soil has warmed and frost danger has passed.
Common pests for Brussels Sprouts in this region include cabbage worm and flea beetles. Use row covers early in the season and inspect plants weekly.
General growing tips
Start seeds indoors 12-14 weeks before first fall frost. Stake tall plants to prevent toppling. Remove lower leaves as sprouts develop to improve air circulation.
Companion Planting
Good Companions
Avoid Planting Near
Check more plant combinations with our Companion Planting Checker →
Brussels Sprouts in Other Locations
Frequently Asked Questions
When should I plant Brussels Sprouts in Putnam County, NY?
Putnam County is in Zone 6b with an average last frost of April 10. Plan your Brussels Sprouts planting based on this frost date — see the calendar above for exact timing.
What planting zone is Putnam County, NY?
Putnam County, New York is in USDA Hardiness Zone 6b. The average last spring frost is April 10 and first fall frost is November 1.
Your Putnam County Garden Planner — Free
A 24-page printable planner built for Putnam County (Zone 6b). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.