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When to plant Lovage in Flathead County County,

In Flathead County County, Lovage is a single-season spring crop — there's no second fall window. Plant June 10–June 24 for an 90-day harvest, finishing well before the September 10 first frost.

When to Plant Lovage in Flathead County, MT

Flathead County, Montana Zone 5a June

Your June game plan for Flathead County, Montana

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

Avg. last frost June 3
Avg. first frost September 10
Soil temp (4") 51°F
Watering High
Pest pressure High
Daylight 15.8 hrs
  1. Move lovage into the garden

    Your last frost (June 3) has passed. These warm-season crops can handle outdoor soil now.

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Lovage is a large perennial herb with a celery-like flavor that can grow 4-6 feet tall. All parts are edible including the leaves, stems, seeds, and roots.

Flathead County, Montana is in USDA Zone 5a. The average last spring frost is June 3 and the first fall frost is September 10, giving you a growing season of approximately 99 days.

At an elevation of 6,233 feet, Flathead County receives approximately 20.7 inches of rainfall annually with predominantly loam soil. Summer highs average 87°F, providing good warmth for Lovage during the growing season.

Flathead County, MT (Zone 5a) Very short season
99 days
Last Spring Frost June 3
99 growing days
First Fall Frost September 10

Flathead County Soil Profile

Soil Type

Loam

Soil pH

6.6-8.4

Drainage

Well Drained

Lovage Planting Risk Windows

Early Start (70% safe) ✗ May not fit
Transplant: May 29 🍅 Harvest: Aug 7 – Oct 9
Recommended (50%) ✗ May not fit
Transplant: Jun 10 🍅 Harvest: Aug 19 – Oct 21
Safe Start (90%) ✗ May not fit
Transplant: Jun 29 🍅 Harvest: Sep 7 – Nov 9

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 Flathead County

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

Soil pH

Your soil pH (6.6–8.4) is more alkaline than Lovage prefers (6.0–7.0). Add sulfur or peat moss to lower pH.

Soil Texture

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

Organic Matter

Organic matter is moderate (2.4%). Annual compost additions will help Lovage.

How to Plant Lovage

0.5"
Planting Depth
8"
Between Plants
12"
Between Rows

Lovage Water Budget

Plant needs
1.0″/week
Rainfall provides
0.9″/week
You supply
0.2″/week
Watering frequency Only during dry spells
Season total 129 gal / 100 sq ft
Drought risk

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

Monthly Watering Guide for Lovage

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

Month Lovage Needs Rainfall You Supplement Action
Jan 1.5" 0" ❄️ Dormant
Feb 1.3" 0" ❄️ Dormant
Mar 1.6" 0" ❄️ Dormant
Apr 2.2" 0" ❄️ Dormant
May 2.7" 0" ❄️ Dormant
Jun 4.3" 1.5" 2.8" 🚿 Regular watering
Jul 4.3" 1.5" 2.8" 🚿 Regular watering
Aug 4.3" 2.1" 2.2" 🚿 Regular watering
Sep 4.3" 1.5" 2.8" 🚿 Regular watering
Oct 1.9" 0" ❄️ Dormant
Nov 1.6" 0" ❄️ Dormant
Dec 1.3" 0" ❄️ Dormant

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

Lovage 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.

Lovage needs ~1,220 GDD — county provides 1,509 GDD Good fit

Lovage Planting Timeline — Flathead County, MT

Lovage Planting Calendar

Activity When Date Range
Transplant Outdoors June 10 Jun 10 – Jun 24
Harvest August 19 Aug 19 – Oct 21

Plant 0.5" deep · 8" apart · Rows 12" apart

Month-by-Month Timeline

MonthActivities
January
February
March
April
May
June Transplant Outdoors
July
August Harvest
September Harvest
October Harvest
November
December

Growing Conditions

☀️ Sun

Partial Shade (3-6 hours)

💧 Water

1"/week · Only during dry spells

📅 Days to Maturity

70–90 days

🧪 Soil pH

Needs 6–7 · Your soil: too_alkaline

🗺️ USDA Zone

Zone 5a

📆 Growing Season

99 days in Flathead County

Growing Tips for Lovage in Flathead County

Direct sow Lovage outdoors after June 03 in Flathead County when soil has warmed and frost danger has passed.

Your 99.0-day growing season in Flathead County is tight for Lovage (70.0-90.0 days to maturity). Start indoors and choose early-maturing varieties.

Common pests for Lovage in this region include carrot rust fly and parsleyworm. Use row covers early in the season and inspect plants weekly.

Flathead County receives only 21" of rain annually. Lovage needs consistent moisture — install drip irrigation or water deeply 2-3 times per week.

General growing tips

Start seeds indoors or direct sow in spring. One plant is usually enough for a family. Harvest outer stems and leaves as needed. Divide clumps every 3-4 years.

Companion Planting

Good Companions

Check more plant combinations with our Companion Planting Checker →

Frequently Asked Questions

When should I plant Lovage in Flathead County, MT?

Flathead County is in Zone 5a with an average last frost of June 3. Plan your Lovage planting based on this frost date — see the calendar above for exact timing.

What planting zone is Flathead County, MT?

Flathead County, Montana is in USDA Hardiness Zone 5a. The average last spring frost is June 3 and first fall frost is September 10.

When should I plant Lovage in Flathead County, ?

In Flathead County, , plant Lovage after the last frost (around June 3) and before the first frost (around September 10). Best results when soil holds above 50°F.

What growing zone is Flathead County, for Lovage?

Flathead County sits in USDA Zone 5a. Lovage grows reliably in zones 3a through 8b, so it's a good fit here.

Can Lovage grow in Flathead County's climate?

Yes — Lovage grows well in Flathead County's temperate climate. Flathead County averages a 99-day frost-free season, with last frost around June 3 and first frost around September 10.

🌱

Your Flathead County Garden Planner — Free

A 22-page printable planner built for Flathead 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 Flathead County, MT. Local conditions may vary. Last updated: June 2026.

Sources & credits

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