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When to Plant Chickpeas in Sweet Grass County, MT

Sweet Grass County, Montana Zone 5a May

May to-do list for Sweet Grass County, Montana

We've pulled the most time-sensitive tasks for Sweet Grass County, Montana this May and put them front and centre. Tackle them in order.

Avg. last frost May 22
Avg. first frost September 19
Soil temp (4") 32°F
Watering High
Pest pressure Low
Daylight 14.7 hrs
  1. Plant out chickpeas

    Plant tomatoes deep — bury the stem up to the first true leaves to grow extra roots. Everything else goes in at the same depth it grew in the tray.

  2. Outdoor sowing time: chickpeas

    Your soil is 32°F — warm enough for these to germinate without babying.

June will be here before you know it — start on
  • Starting indoors: chickpeas

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Chickpeas (garbanzo beans) are a drought-tolerant legume producing round, nutty-flavored beans. They are the base for hummus, falafel, and many global dishes.

Sweet Grass County, Montana is in USDA Zone 5a. The average last spring frost is May 22 and the first fall frost is September 19, giving you a growing season of approximately 120 days.

At an elevation of 7,534 feet, Sweet Grass County receives approximately 16.9 inches of rainfall annually with predominantly loam soil. Summer highs average 82°F, so choose short-season varieties of Chickpeas to ensure they mature before fall. With low rainfall, drip irrigation is essential for growing Chickpeas successfully. Mulch heavily to conserve soil moisture.

Sweet Grass County, MT (Zone 5a) Short season
120 days
Last Spring Frost May 22
120 growing days
First Fall Frost September 19
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Sweet Grass County Soil Profile

Soil Type

Loam

Soil pH

6.7-8.4

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✗ May not fit
Start indoors: Apr 11 Transplant: May 16 🍅 Harvest: Aug 8 – Sep 19
Recommended (50%) ✗ May not fit
Start indoors: Apr 17 Transplant: May 22 🍅 Harvest: Aug 14 – Sep 25
Safe Start (90%) ✗ May not fit
Start indoors: May 2 Transplant: Jun 6 🍅 Harvest: Aug 29 – Oct 10

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 Sweet Grass County

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

Soil pH

Your soil pH (6.7–8.4) overlaps with Chickpeas's range (6.0–8.0), though not a perfect match.

Soil Texture

The loam soil in Sweet Grass County is excellent for Chickpeas — good drainage, moisture retention, and nutrient holding capacity.

Organic Matter

Organic matter is moderate (2.2%). Annual compost additions will help Chickpeas.

How to Plant Chickpeas

0.5"
Planting Depth
6"
Between Plants
12"
Between Rows

Fall planting: Sow 10 weeks before your first frost date for a fall harvest.

Plant Water Budget

Plant needs
0.5″/week
Rainfall provides
0.6″/week
Watering frequency Natural rainfall sufficient
Season total 0 gal / 100 sq ft
Drought risk

Water stress score is 6/10 — consider drought-tolerant varieties and mulching

Monthly Watering Guide for Chickpeas

Chickpeas needs approximately 0.5 inches of water per week (2.2" per month). Here's how your county's rainfall compares month by month.

Month Chickpeas Needs Rainfall You Supplement Action
Jan 1.3" 0" ❄️ Dormant
Feb 1" 0" ❄️ Dormant
Mar 1.3" 0" ❄️ Dormant
Apr 2" 0" ❄️ Dormant
May 2.2" 2" 0.2" 💧 Light watering
Jun 2.2" 1" 1.2" 🚿 Regular watering
Jul 2.2" 1.4" 0.8" 💧 Light watering
Aug 2.2" 1.9" 0.3" 💧 Light watering
Sep 2.2" 1.2" 1" 💧 Light watering
Oct 1.6" 0" ❄️ Dormant
Nov 1.3" 0" ❄️ Dormant
Dec 0.9" 0" ❄️ Dormant

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

Chickpeas 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.

Chickpeas needs ~1,092 GDD — county provides 1,380 GDD Good fit

Chickpeas Planting Timeline — Sweet Grass County, MT

Chickpeas Planting Calendar

Activity When Date Range
Start Indoors April 17 Apr 17 – May 1
Transplant Outdoors May 22 May 22 – Jun 5
Direct Sow May 8 May 8 – May 29
Harvest August 14 Aug 14 – Sep 25
Fall Sowing July 11 Jul 11 – Jul 25

Plant 0.5" deep · 6" apart · Rows 12" apart

Month-by-Month Timeline

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

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

0.5"/week · Natural rainfall sufficient

📅 Days to Maturity

80–110 days

🧪 Soil pH

Needs 6–8 · Your soil: acceptable

🗺️ USDA Zone

Zone 5a

📆 Growing Season

120 days in Sweet Grass County

Growing Tips for Chickpeas in Sweet Grass County

Direct sow Chickpeas outdoors after May 22 in Sweet Grass County when soil has warmed and frost danger has passed.

Your 120.0-day growing season in Sweet Grass County is tight for Chickpeas (80.0-110.0 days to maturity). Start indoors and choose early-maturing varieties.

Common pests for Chickpeas in this region include bean beetles and aphids. Use row covers early in the season and inspect plants weekly.

Sweet Grass County receives only 17" of rain annually. Chickpeas needs consistent moisture — install drip irrigation or water deeply 2-3 times per week.

General growing tips

Direct sow 4 weeks before last frost as chickpeas prefer cool growing conditions. Avoid overhead watering to prevent fungal diseases. Harvest when pods rattle with dry beans inside.

Companion Planting

Good Companions

Avoid Planting Near

  • Onion
  • Garlic

Check more plant combinations with our Companion Planting Checker →

Frequently Asked Questions

When should I plant Chickpeas in Sweet Grass County, MT?

Sweet Grass County is in Zone 5a with an average last frost of May 22. Plan your Chickpeas planting based on this frost date — see the calendar above for exact timing.

What planting zone is Sweet Grass County, MT?

Sweet Grass County, Montana is in USDA Hardiness Zone 5a. The average last spring frost is May 22 and first fall frost is September 19.

🌱

Your Sweet Grass County Garden Planner — Free

A 24-page printable planner built for Sweet Grass 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.

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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 Sweet Grass County, MT. Local conditions may vary. Last updated: May 2026.

Sources & credits

Every number on this page traces back to a primary horticulture or government data source. Click through to verify.