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When to Plant Savoy Cabbage in Shannon County, SD

Shannon County, South Dakota Zone 4a May

Shannon County, South Dakota gardeners: here's your May plan

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

Avg. last frost May 14
Avg. first frost October 2
Soil temp (4") 53°F
Watering High
Pest pressure Low
Daylight 14.5 hrs
  1. Time to transplant savoy cabbage

    Bring a watering can to the bed. Each transplant gets a drink the moment it's in the ground, not ten minutes later.

  2. Seed savoy cabbage outdoors

    Mark the row. Birds and stray feet both have opinions about unmarked beds.

Get ahead of June
  • Starting indoors: savoy cabbage

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Savoy cabbage has crinkled, deeply veined leaves that form looser heads than regular cabbage. It has a milder, sweeter flavor and is more cold-tolerant.

Shannon County, South Dakota is in USDA Zone 4a. The average last spring frost is May 14 and the first fall frost is October 2, giving you a growing season of approximately 141 days.

At an elevation of 939 feet, Shannon County receives approximately 24.4 inches of rainfall annually with predominantly loam soil. Summer highs average 81°F, so choose short-season varieties of Savoy Cabbage to ensure they mature before fall.

Shannon County, SD (Zone 4a) Short season
141 days
Last Spring Frost May 14
141 growing days
First Fall Frost October 2

Shannon County Soil Profile

Soil Type

Loam

Soil pH

6.3-7.8

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (10 days to spare)
Start indoors: Mar 29 Transplant: May 10 🍅 Harvest: Jul 19 – Sep 13
Recommended (50%) ✓ Fits season (15 days to spare)
Start indoors: Apr 2 Transplant: May 14 🍅 Harvest: Jul 23 – Sep 17
Safe Start (90%) ✓ Fits season (15 days to spare)
Start indoors: Apr 12 Transplant: May 24 🍅 Harvest: Aug 2 – Sep 27

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 Shannon County

How your county's soil matches Savoy Cabbage's growing requirements.

Soil pH

Your soil pH (6.3–7.8) overlaps with Savoy Cabbage's range (6.0–7.5), though not a perfect match.

Soil Texture

The loam soil in Shannon County is excellent for Savoy Cabbage — good drainage, moisture retention, and nutrient holding capacity.

Organic Matter

Organic matter is moderate (4.0%). Annual compost additions will help Savoy Cabbage.

How to Plant Savoy Cabbage

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 Savoy Cabbage

2
successive plantings in your 141-day season

Sow every 8 weeks. Last sowing by Jun 14 to harvest before frost.

For a dedicated fall crop, sow by Jul 10.

Plant Water Budget

Plant needs
1.0″/week
Rainfall provides
0.7″/week
You supply
0.3″/week
Watering frequency 1-2 times/week
Season total 411 gal / 100 sq ft
Drought risk

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

Monthly Watering Guide for Savoy Cabbage

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

Month Savoy Cabbage Needs Rainfall You Supplement Action
Jan 1.6" 0" ❄️ Dormant
Feb 1.3" 0" ❄️ Dormant
Mar 2" 0" ❄️ Dormant
Apr 2.5" 0" ❄️ Dormant
May 4.3" 2.6" 1.7" 💧 Light watering
Jun 4.3" 2" 2.3" 🚿 Regular watering
Jul 4.3" 2.3" 2" 💧 Light watering
Aug 4.3" 2.6" 1.7" 💧 Light watering
Sep 4.3" 2" 2.3" 🚿 Regular watering
Oct 4.3" 2.3" 2" 💧 Light watering
Nov 1.9" 0" ❄️ Dormant
Dec 1.3" 0" ❄️ Dormant

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

Savoy Cabbage 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.

Savoy Cabbage needs ~968 GDD — county provides 1,515 GDD Excellent fit

Savoy Cabbage Planting Timeline — Shannon County, SD

Savoy Cabbage 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 23 Jul 23 – Sep 17
Fall Sowing July 10 Jul 10 – Jul 24

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 Harvest
October
November
December

Growing Conditions

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

1"/week · 1-2 times/week

📅 Days to Maturity

70–110 days

🧪 Soil pH

Needs 6–7.5 · Your soil: acceptable

🗺️ USDA Zone

Zone 4a

📆 Growing Season

141 days in Shannon County

Growing Tips for Savoy Cabbage in Shannon County

Direct sow Savoy Cabbage outdoors after May 14 in Shannon County when soil has warmed and frost danger has passed.

Common pests for Savoy Cabbage in this region include cabbage worm and flea beetles. Use row covers early in the season and inspect plants weekly.

Shannon County receives only 24" of rain annually. Savoy Cabbage needs consistent moisture — install drip irrigation or water deeply 2-3 times per week.

General growing tips

Start seeds indoors 4-6 weeks before last frost. Savoy cabbage is more forgiving of temperature fluctuations than smooth-leaved types. Excellent for stuffed cabbage rolls.

Companion Planting

Good Companions

Avoid Planting Near

  • Strawberries
  • Tomatoes

Check more plant combinations with our Companion Planting Checker →

Frequently Asked Questions

When should I plant Savoy Cabbage in Shannon County, SD?

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

What planting zone is Shannon County, SD?

Shannon County, South Dakota is in USDA Hardiness Zone 4a. The average last spring frost is May 14 and first fall frost is October 2.

🌱

Your Shannon County Garden Planner — Free

A 24-page printable planner built for Shannon County (Zone 4a). 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 Shannon County, SD. 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.