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When to plant Chard in Musselshell County, MT

For Chard in Musselshell County, the safe spring window opens around May 7 and closes around May 28. Last expected frost is May 14, first fall frost September 23, giving a 132-day growing season. A second sowing from July 1 to July 15 extends the harvest into fall.

When to Plant Chard in Musselshell County, MT

Musselshell County, Montana Zone 4b August

Top priorities for Musselshell County, Montana gardeners in August

If you only do a handful of things in the garden this August, make it these. They're sequenced around your zone's frost timing.

Avg. last frost May 14
Avg. first frost September 23
Soil temp (4") 54°F
Watering High
Pest pressure High
Daylight 14 hrs
  1. Collect chard at their peak

    Morning harvests are best — cooler temperatures mean crisper produce and longer fridge life.

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Swiss chard is a colorful, heat-tolerant green with large crinkled leaves and vibrant stalks in red, yellow, and white. Both the leaves and stems are edible and nutritious.

Musselshell County, Montana is in USDA Zone 4b. The average last spring frost is May 14 and the first fall frost is September 23, giving you a growing season of approximately 132 days.

At an elevation of 6,528 feet, Musselshell County receives approximately 15.4 inches of rainfall annually with predominantly loam soil. Summer highs average 82°F, so choose short-season varieties of Chard to ensure they mature before fall. With low rainfall, drip irrigation is essential for growing Chard successfully. Mulch heavily to conserve soil moisture.

Musselshell County, MT (Zone 4b) Short season
132 days
Last Spring Frost May 14
132 growing days
First Fall Frost September 23

Musselshell County Soil Profile

Soil Type

Loam

Soil pH

6.5-8.4

Drainage

Well Drained

Chard Planting Risk Windows

Early Start (70% safe) ✓ Fits season (26 days to spare)
Start indoors: Mar 28 Transplant: May 9 🍅 Harvest: Jul 4 – Aug 22
Recommended (50%) ✓ Fits season (27 days to spare)
Start indoors: Apr 2 Transplant: May 14 🍅 Harvest: Jul 9 – Aug 27
Safe Start (90%) ✓ Fits season (34 days to spare)
Start indoors: Apr 13 Transplant: May 25 🍅 Harvest: Jul 20 – Sep 7

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 Musselshell County

How your county's soil matches Chard's growing requirements.

Soil pH

Your soil pH (6.5–8.4) is more alkaline than Chard prefers (6.0–7.0). Add sulfur or peat moss to lower pH.

Soil Texture

The loam soil in Musselshell County is excellent for Chard — good drainage, moisture retention, and nutrient holding capacity.

Organic Matter

Organic matter is moderate (2.7%). Annual compost additions will help Chard.

How to Plant Chard

1"
Planting Depth
15"
Between Plants
24"
Between Rows

Fall planting: Sow 12 weeks before your first frost date for a fall harvest.

Succession Planting Chard

3
successive plantings in your 132-day season

Sow every 5.7 weeks. Last sowing by Jul 25 to harvest before frost.

For a dedicated fall crop, sow by Jul 01.

Chard Water Budget

Plant needs
0.8″/week
Rainfall provides
0.5″/week
You supply
0.4″/week
Watering frequency 1-2 times/week
Season total 437 gal / 100 sq ft
Drought risk

Water stress score is 8/10 — consider drought-tolerant varieties and mulching

Monthly Watering Guide for Chard

Chard needs approximately 0.8 inches of water per week (3.5" per month). Here's how your county's rainfall compares month by month.

Month Chard Needs Rainfall You Supplement Action
Jan 1.1" 0" ❄️ Dormant
Feb 0.8" 0" ❄️ Dormant
Mar 1.2" 0" ❄️ Dormant
Apr 1.7" 0" ❄️ Dormant
May 3.5" 2" 1.5" 💧 Light watering
Jun 3.5" 1.1" 2.4" 🚿 Regular watering
Jul 3.5" 1.3" 2.2" 🚿 Regular watering
Aug 3.5" 1.6" 1.9" 🚿 Regular watering
Sep 3.5" 1.1" 2.4" 🚿 Regular watering
Oct 1.4" 0" ❄️ Dormant
Nov 1.1" 0" ❄️ Dormant
Dec 1" 0" ❄️ Dormant

Water needs are for active growing months only (May–Sep in Musselshell County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.

Chard 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.

Chard needs ~632 GDD — county provides 1,518 GDD Excellent fit

Chard Planting Timeline — Musselshell County, MT

Chard Planting Calendar

Activity When Date Range
Start Indoors April 2 Apr 2 – Apr 16
Transplant Outdoors May 14 May 14 – May 28
Direct Sow May 7 May 7 – May 28
Harvest July 9 Jul 9 – Aug 27
Fall Sowing July 1 Jul 1 – Jul 15

Plant 1" deep · 15" apart · Rows 24" apart

Month-by-Month Timeline

MonthActivities
January
February
March
April Start Indoors
May Transplant Outdoors Direct Sow
June
July Fall Sowing Harvest
August Harvest
September
October
November
December

Growing Conditions

☀️ Sun

Partial Shade (3-6 hours)

💧 Water

0.8"/week · 1-2 times/week

📅 Days to Maturity

50–60 days

🧪 Soil pH

Needs 6–7 · Your soil: too_alkaline

🗺️ USDA Zone

Zone 4b

📆 Growing Season

132 days in Musselshell County

Growing Tips for Chard in Musselshell County

Direct sow Chard outdoors after May 14 in Musselshell County when soil has warmed and frost danger has passed.

General growing tips

Direct sow or transplant after last frost. Harvest outer leaves regularly to encourage continuous production. Chard tolerates both heat and light frost.

Companion Planting

Good Companions

Avoid Planting Near

  • Corn
  • Cucumbers

Check more plant combinations with our Companion Planting Checker →

Frequently Asked Questions

When should I plant Chard in Musselshell County, MT?

Musselshell County is in Zone 4b with an average last frost of May 14. Plan your Chard planting based on this frost date — see the calendar above for exact timing.

What planting zone is Musselshell County, MT?

Musselshell County, Montana is in USDA Hardiness Zone 4b. The average last spring frost is May 14 and first fall frost is September 23.

When should I plant Chard in Musselshell County, MT?

In Musselshell County, MT, plant Chard after the last frost (around May 14) and before the first frost (around September 23). Best results when soil holds above 50°F.

What growing zone is Musselshell County, MT for Chard?

Musselshell County sits in USDA Zone 4b. Chard grows reliably in zones 2a through 11b, so it's a good fit here.

Can Chard grow in Musselshell County's climate?

Yes — Chard grows well in Musselshell County's temperate climate. Musselshell County averages a 132-day frost-free season, with last frost around May 14 and first frost around September 23.

🌱

Your Musselshell County Garden Planner — Free

A 22-page printable planner built for Musselshell County (Zone 4b). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.

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Data sources: USDA Plant Hardiness Zone Map (2023), NOAA 30-Year Climate Normals. Frost dates are based on 50% probability averages for Musselshell County, MT. Local conditions may vary. Last updated: August 2026.

Sources & credits

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