When to plant Broccoli in Madison County, MT
Aim to plant Broccoli in Madison County on or after May 28; the window stays open through June 18. Madison County's 94-day frost-free season gives you just enough for one full spring planting. A second sowing from July 5 to July 19 extends the harvest into fall.
When to Plant Broccoli in Madison County, MT
Broccoli is a nutrient-dense cool-season crop that produces large central heads followed by smaller side shoots. It is one of the most popular garden vegetables.
Madison County, Montana is in USDA Zone 5a. The average last spring frost is June 11 and the first fall frost is September 13, giving you a growing season of approximately 94 days.
At an elevation of 6,394 feet, Madison County receives approximately 20.7 inches of rainfall annually with predominantly loam soil. Summer highs average 80°F, so choose short-season varieties of Broccoli to ensure they mature before fall.
Madison County Soil Profile
Soil Type
Loam
Soil pH
6.0-7.0
Drainage
Well Drained
How Much Broccoli to Grow
For a family of 4, plant approximately 12 broccoli plants in about 24 sq ft. In Madison County's 94-day season, you'll have plenty of time for a full harvest. Plan your garden layout →
Broccoli Planting Timeline — Madison County, MT
Broccoli Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | May 7 | May 7 – May 21 |
| Transplant Outdoors | June 11 | Jun 11 – Jun 25 |
| Direct Sow | May 28 | May 28 – Jun 18 |
| Harvest | August 13 | Aug 13 – Sep 24 |
| Fall Sowing | July 5 | Jul 5 – Jul 19 |
Plant 1" deep · 15" apart · Rows 24" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | — |
| April | — |
| May | Start Indoors Direct Sow |
| June | Transplant Outdoors Direct Sow |
| July | Fall Sowing |
| August | Harvest |
| September | Harvest |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
Moderate — regular watering
📅 Days to Maturity
60–90 days
🧪 Soil pH
Needs 6–7 · Your soil: N/A
🗺️ USDA Zone
Zone 5a
📆 Growing Season
94 days in Madison County
Growing Tips for Madison County
Start seeds indoors 6-8 weeks before last frost. Provide consistent moisture to prevent hollow stems. Harvest heads before yellow flowers appear.
Companion Planting
Good Companions
Avoid Planting Near
Check more plant combinations with our Companion Planting Checker →
Isolate 1/2 mile from other brassicas. Biennial — must overwinter roots.
Broccoli in Other Locations
Frequently Asked Questions
When should I plant Broccoli in Madison County, MT?
Madison County is in Zone 5a with an average last frost of June 11. Plan your Broccoli planting based on this frost date — see the calendar above for exact timing.
What planting zone is Madison County, MT?
Madison County, Montana is in USDA Hardiness Zone 5a. The average last spring frost is June 11 and first fall frost is September 13.
When should I plant Broccoli in Madison County, MT?
In Madison County, MT, plant Broccoli after the last frost (around June 11) and before the first frost (around September 13). Best results when soil holds above 50°F.
What growing zone is Madison County, MT for Broccoli?
Madison County sits in USDA Zone 5a. Broccoli grows reliably in zones 2a through 11b, so it's a good fit here.
Can Broccoli grow in Madison County's climate?
Yes — Broccoli grows well in Madison County's temperate climate. Madison County averages a 94-day frost-free season, with last frost around June 11 and first frost around September 13.
Your Madison County Garden Planner — Free
A 22-page printable planner built for Madison County (Zone 5a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.