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When to Plant Microgreens in Lincoln County, MT

Lincoln County, Montana Zone 5a May

Lincoln County, Montana gardeners: here's your May plan

Here's what deserves your attention in Lincoln County, Montana this month. Everything below is tailored to Zone 5a and timed around your local frost dates.

Avg. last frost May 16
Avg. first frost September 23
Soil temp (4") 37°F
Watering High
Pest pressure Low
Daylight 15 hrs
  1. Transplant microgreens outside

    Pick a cloudy afternoon or evening to plant. Less transplant shock, and your seedlings will barely blink.

  2. Plant microgreens from seed, right in the garden

    Your soil is 37°F — warm enough for these to germinate without babying.

  3. Basket week: microgreens

    This is the payoff month. Bring a basket, bring a friend, and get into the beds.

Get ahead of June
  • Starting indoors: microgreens
  • First harvests: microgreens

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Microgreens are young seedlings of vegetables and herbs harvested at the cotyledon or first true leaf stage. They pack concentrated flavors and nutrients in a tiny package.

Lincoln County, Montana is in USDA Zone 5a. The average last spring frost is May 16 and the first fall frost is September 23, giving you a growing season of approximately 130 days.

At an elevation of 6,794 feet, Lincoln County receives approximately 18.1 inches of rainfall annually with predominantly loam soil. Summer highs average 86°F, providing good warmth for Microgreens during the growing season. With low rainfall, drip irrigation is essential for growing Microgreens successfully. Mulch heavily to conserve soil moisture.

Lincoln County, MT (Zone 5a) Short season
130 days
Last Spring Frost May 16
130 growing days
First Fall Frost September 23

Lincoln County Soil Profile

Soil Type

Loam

Soil pH

6.8-7.7

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (100 days to spare)
Start indoors: Mar 31 Transplant: May 5 🍅 Harvest: May 12 – Jun 9
Recommended (50%) ✓ Fits season (95 days to spare)
Start indoors: Apr 11 Transplant: May 16 🍅 Harvest: May 23 – Jun 20
Safe Start (90%) ✓ Fits season (93 days to spare)
Start indoors: May 5 Transplant: Jun 9 🍅 Harvest: Jun 16 – Jul 14

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 Lincoln County

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

Soil pH

Your soil pH (6.8–7.7) is more alkaline than Microgreens prefers (6.0–7.0). Add sulfur or peat moss to lower pH.

Soil Texture

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

Organic Matter

Organic matter is moderate (2.6%). Annual compost additions will help Microgreens.

How to Plant Microgreens

0.5"
Planting Depth
2"
Between Plants
6"
Between Rows

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

Succession Planting Microgreens

25
successive plantings in your 130-day season

Sow every 0.7 weeks. Last sowing by Sep 02 to harvest before frost.

For a dedicated fall crop, sow by Jul 15.

Plant Water Budget

Plant needs
1.0″/week
Rainfall provides
0.6″/week
You supply
0.5″/week
Watering frequency 1-2 times/week
Season total 577 gal / 100 sq ft
Drought risk

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

Monthly Watering Guide for Microgreens

Microgreens needs approximately 1 inches of water per week (4.3" per month). Here's how your county's rainfall compares month by month.

Month Microgreens Needs Rainfall You Supplement Action
Jan 1.4" 0" ❄️ Dormant
Feb 1.1" 0" ❄️ Dormant
Mar 1.5" 0" ❄️ Dormant
Apr 1.9" 0" ❄️ Dormant
May 4.3" 2.1" 2.2" 🚿 Regular watering
Jun 4.3" 1.2" 3.1" 🚿 Regular watering
Jul 4.3" 1.8" 2.5" 🚿 Regular watering
Aug 4.3" 1.6" 2.7" 🚿 Regular watering
Sep 4.3" 1.5" 2.8" 🚿 Regular watering
Oct 1.6" 0" ❄️ Dormant
Nov 1.4" 0" ❄️ Dormant
Dec 0.9" 0" ❄️ Dormant

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

Microgreens 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.

Microgreens needs ~203 GDD — county provides 1,885 GDD Excellent fit

Microgreens Planting Timeline — Lincoln County, MT

Microgreens Planting Calendar

Activity When Date Range
Start Indoors April 11 Apr 11 – Apr 25
Transplant Outdoors May 16 May 16 – May 30
Direct Sow May 2 May 2 – May 23
Harvest May 23 May 23 – Jun 20
Fall Sowing July 15 Jul 15 – Jul 29

Plant 0.5" deep · 2" apart · Rows 6" apart

Month-by-Month Timeline

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

Growing Conditions

☀️ Sun

Partial Shade (3-6 hours)

💧 Water

1"/week · 1-2 times/week

📅 Days to Maturity

7–21 days

🧪 Soil pH

Needs 6–7 · Your soil: too_alkaline

🗺️ USDA Zone

Zone 5a

📆 Growing Season

130 days in Lincoln County

Growing Tips for Microgreens in Lincoln County

Direct sow Microgreens outdoors after May 16 in Lincoln County when soil has warmed and frost danger has passed.

Your generous 130.0-day season in Lincoln County allows multiple plantings of Microgreens. Sow every 3.0 days for continuous harvest.

Lincoln County receives only 18" of rain annually. Microgreens needs consistent moisture — install drip irrigation or water deeply 2-3 times per week.

General growing tips

Sow seeds densely on shallow trays of moist growing medium. Cover until germination, then provide light. Harvest with scissors when 1-3 inches tall. Grow year-round indoors.

Frequently Asked Questions

When should I plant Microgreens in Lincoln County, MT?

Lincoln County is in Zone 5a with an average last frost of May 16. Plan your Microgreens planting based on this frost date — see the calendar above for exact timing.

What planting zone is Lincoln County, MT?

Lincoln County, Montana is in USDA Hardiness Zone 5a. The average last spring frost is May 16 and first fall frost is September 23.

🌱

Your Lincoln County Garden Planner — Free

A 24-page printable planner built for Lincoln 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.

Instant PDF download. No spam, unsubscribe any time.

Data sources: USDA Plant Hardiness Zone Map (2023), NOAA 30-Year Climate Normals. Frost dates are based on 50% probability averages for Lincoln 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.