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When to plant Begonias in Traverse County, MN

Traverse County's short 157-day growing season means one Begonias planting between May 9 and May 23. No fall crop in Zone 4b.

When to Plant Begonias in Traverse County, MN

Traverse County, Minnesota Zone 4b July

July in the garden — Traverse County, Minnesota

July rewards gardeners who work with the weather, not against it. Here's how to stay in step this month in Traverse County, Minnesota.

Avg. last frost May 2
Avg. first frost October 6
Soil temp (4") 74°F
Watering Low
Pest pressure High
Daylight 15.2 hrs
  1. Fire up the seed-starting tray: begonias

    A seed-starting mix and a sunny window (or a grow light) are all you need. Keep soil warm — around 70°F — for fast germination.

  2. Basket week: begonias

    Don't tug. Use scissors or pruners for clean cuts — torn stems invite disease.

To set up a strong August, finish these tasks
  • First harvests: begonias

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Wax begonias (Begonia × semperflorens) are the workhorse shade bedding plant of American horticulture, offering continuous bloom from transplant to hard frost. Bronze or green-leaved varieties perform well from deep shade to full sun (in northern zones) and tolerate summer humidity better than most cool- season flowers. A staple of mass plantings, containers, and window boxes.

Traverse County, Minnesota is in USDA Zone 4b. The average last spring frost is May 2 and the first fall frost is October 6, giving you a growing season of approximately 157 days.

At an elevation of 1,008 feet, Traverse County receives approximately 31.7 inches of rainfall annually with predominantly silt loam soil. Summer highs average 80°F, so choose short-season varieties of Begonias to ensure they mature before fall.

Annual Blooms in Multi-season Pollinator-friendly Deer-resistant
Traverse County, MN (Zone 4b) Moderate season
157 days
Last Spring Frost May 2
157 growing days
First Fall Frost October 6

Traverse County Soil Profile

Soil Type

Silt Loam

Soil pH

6.2-7.2

Drainage

Well Drained

Begonias Planting Risk Windows

Early Start (70% safe) ✓ Fits season (12 days to spare)
Start indoors: Feb 8 Transplant: May 3 🌸 Bloom: Jul 12 – Sep 20
Recommended (50%) ✓ Fits season (10 days to spare)
Start indoors: Feb 14 Transplant: May 9 🌸 Bloom: Jul 18 – Sep 26
Safe Start (90%) ✓ Fits season (11 days to spare)
Start indoors: Feb 26 Transplant: May 21 🌸 Bloom: Jul 30 – Oct 8

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 Traverse County

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

Soil pH

Your soil pH (6.2–7.2) is more alkaline than Begonias prefers (5.5–6.5). Add sulfur or peat moss to lower pH.

Soil Texture

The silt loam soil in Traverse County is excellent for Begonias — good drainage, moisture retention, and nutrient holding capacity.

Organic Matter

Organic matter is moderate (3.8%). Annual compost additions will help Begonias.

How to Plant Begonias

8"
Between Plants
10"
Between Rows

Succession Planting Begonias

2
successive plantings in your 157-day season

Sow every 8 weeks. Last sowing by Jul 08 to harvest before frost.

Begonias 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 212 gal / 100 sq ft

Monthly Watering Guide for Begonias

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

Month Begonias Needs Rainfall You Supplement Action
Jan 1.4" 0" ❄️ Dormant
Feb 1.5" 0" ❄️ Dormant
Mar 2.4" 0" ❄️ Dormant
Apr 3.3" 0" ❄️ Dormant
May 4.3" 3.1" 1.2" 💧 Light watering
Jun 4.3" 4.1" 0.2" 💧 Light watering
Jul 4.3" 3.8" 0.5" 💧 Light watering
Aug 4.3" 3.3" 1" 💧 Light watering
Sep 4.3" 2.5" 1.8" 💧 Light watering
Oct 4.3" 2.4" 1.9" 💧 Light watering
Nov 2.3" 0" ❄️ Dormant
Dec 1.7" 0" ❄️ Dormant

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

Begonias 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.

Begonias needs ~800 GDD — county provides 1,570 GDD Excellent fit

Begonias Planting Timeline — Traverse County, MN

Begonias Planting Calendar

Activity When Date Range
Start Indoors February 14 Feb 14 – Feb 28
Transplant Outdoors May 9 May 9 – May 23
Bloom July 18 Jul 18 – Sep 26

· 8" apart · Rows 10" apart

Month-by-Month Timeline

MonthActivities
January
February Start Indoors
March
April
May Transplant Outdoors
June
July Bloom
August Bloom
September Bloom
October
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 5.5–6.5 · Your soil: too_alkaline

🗺️ USDA Zone

Zone 4b

📆 Growing Season

157 days in Traverse County

Growing Tips for Begonias in Traverse County

Direct sow Begonias outdoors after May 02 in Traverse County when soil has warmed and frost danger has passed.

General growing tips

Start seeds indoors 10–12 weeks before last frost — seed is dust-fine; surface-sow on moist mix under lights, do not cover. Bottom heat (70–75°F) speeds germination. Transplant after frost; begonias are not direct-sown in practice. Pinch seedlings once for branching. Keep soil evenly moist; avoid waterlogged conditions. Bronze-leaf types tolerate more sun; green- leaf types prefer shade to part-sun.

Companion Planting

Good Companions

Check more plant combinations with our Companion Planting Checker →

Frequently Asked Questions

When should I plant Begonias in Traverse County, MN?

Traverse County is in Zone 4b with an average last frost of May 2. Plan your Begonias planting based on this frost date — see the calendar above for exact timing.

What planting zone is Traverse County, MN?

Traverse County, Minnesota is in USDA Hardiness Zone 4b. The average last spring frost is May 2 and first fall frost is October 6.

When should I plant Begonias in Traverse County, MN?

In Traverse County, MN, plant Begonias after the last frost (around May 2) and before the first frost (around October 6). Best results when soil holds above 50°F.

What growing zone is Traverse County, MN for Begonias?

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

Can Begonias grow in Traverse County's climate?

Yes — Begonias grows well in Traverse County's temperate climate. Traverse County averages a 157-day frost-free season, with last frost around May 2 and first frost around October 6.

🌱

Your Traverse County Garden Planner — Free

A 22-page printable planner built for Traverse 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 Traverse County, MN. Local conditions may vary. Last updated: July 2026.

Sources & credits

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