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When to plant Amaranth in Madison County, AL

The best window to plant Amaranth in Madison County, is April 13–May 4, when soil warms to 50°F. Last frost typically hits April 6; first frost October 31.

When to Plant Amaranth in Madison County, AL

Madison County, Alabama Zone 8a June

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Avg. last frost April 6
Avg. first frost October 31
Soil temp (4") 76°F
Watering Low
Pest pressure High
Daylight 14.3 hrs
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Amaranth is an ancient grain crop with edible leaves and seeds, rich in protein and micronutrients. It thrives in warm conditions and is drought-tolerant once established.

Madison County, Alabama is in USDA Zone 8a. The average last spring frost is April 6 and the first fall frost is October 31, giving you a growing season of approximately 208 days.

At an elevation of 286 feet, Madison County receives approximately 55.3 inches of rainfall annually with predominantly clay loam soil. Summer highs average 90°F, providing good warmth for Amaranth during the growing season. Clay soil retains moisture well for Amaranth, but amend with compost to improve drainage and prevent root rot. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Amaranth root diseases.

Madison County, AL (Zone 8a) Long season
208 days
Last Spring Frost April 6
208 growing days
First Fall Frost October 31

Madison County Soil Profile

Soil Type

Clay Loam

Soil pH

5.6-6.7

Drainage

Well Drained

Amaranth Planting Risk Windows

Early Start (70% safe) ✓ Fits season (56 days to spare)
Start indoors: Feb 6 Transplant: Apr 10 🍅 Harvest: Jul 10 – Aug 28
Recommended (50%) ✓ Fits season (54 days to spare)
Start indoors: Feb 16 Transplant: Apr 20 🍅 Harvest: Jul 20 – Sep 7
Safe Start (90%) ✓ Fits season (54 days to spare)
Start indoors: Mar 1 Transplant: May 3 🍅 Harvest: Aug 2 – Sep 20

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 Madison County

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

Soil pH

Your soil pH (5.6–6.7) overlaps with Amaranth's range (6.0–7.5), though not a perfect match.

Soil Texture

The clay loam soil in Madison County is excellent for Amaranth — good drainage, moisture retention, and nutrient holding capacity.

Organic Matter

Organic matter is moderate (2.7%). Annual compost additions will help Amaranth.

How to Plant Amaranth

1"
Planting Depth
15"
Between Plants
24"
Between Rows

Amaranth Water Budget

Plant needs
1.0″/week
Rainfall provides
1.1″/week
Watering frequency Natural rainfall sufficient
Season total 0 gal / 100 sq ft

Monthly Watering Guide for Amaranth

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

Month Amaranth Needs Rainfall You Supplement Action
Jan 4.9" 0" ❄️ Dormant
Feb 4.3" 0" ❄️ Dormant
Mar 5.6" 0" ❄️ Dormant
Apr 4.3" 4" 0.3" 💧 Light watering
May 4.3" 4" 0.3" 💧 Light watering
Jun 4.3" 4.2" 0.1" 💧 Light watering
Jul 4.3" 6.6" 0" ✅ Rainfall sufficient
Aug 4.3" 4.8" 0" ✅ Rainfall sufficient
Sep 4.3" 3.8" 0.5" 💧 Light watering
Oct 4.3" 3.5" 0.8" 💧 Light watering
Nov 4.8" 0" ❄️ Dormant
Dec 4.8" 0" ❄️ Dormant

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

Amaranth 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.

Amaranth needs ~1,838 GDD — county provides 3,640 GDD Excellent fit

Amaranth Planting Timeline — Madison County, AL

Amaranth Planting Calendar

Activity When Date Range
Start Indoors February 16 Feb 16 – Mar 2
Transplant Outdoors April 20 Apr 20 – May 4
Direct Sow April 13 Apr 13 – May 4
Harvest July 20 Jul 20 – Sep 7

Plant 1" deep · 15" apart · Rows 24" apart

Month-by-Month Timeline

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

Growing Conditions

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

1"/week · Natural rainfall sufficient

📅 Days to Maturity

90–120 days

🧪 Soil pH

Needs 6–7.5 · Your soil: acceptable

🗺️ USDA Zone

Zone 8a

📆 Growing Season

208 days in Madison County

Growing Tips for Amaranth in Madison County

Direct sow Amaranth outdoors after April 06 in Madison County when soil has warmed and frost danger has passed.

With Madison County's clay soil (29% clay), work in 3-4 inches of compost before planting Amaranth. Avoid tilling when soil is wet to prevent compaction.

General growing tips

Direct sow after last frost when soil is warm. Thin seedlings to 18 inches apart. Harvest leaves when young and tender; harvest seeds when flower heads begin to dry.

Companion Planting

Good Companions

Avoid Planting Near

  • Fennel

Check more plant combinations with our Companion Planting Checker →

Frequently Asked Questions

When should I plant Amaranth in Madison County, AL?

Madison County is in Zone 8a with an average last frost of April 6. Plan your Amaranth planting based on this frost date — see the calendar above for exact timing.

What planting zone is Madison County, AL?

Madison County, Alabama is in USDA Hardiness Zone 8a. The average last spring frost is April 6 and first fall frost is October 31.

When should I plant Amaranth in Madison County, AL?

In Madison County, AL, plant Amaranth after the last frost (around April 6) and before the first frost (around October 31). Best results when soil holds above 50°F.

What growing zone is Madison County, AL for Amaranth?

Madison County sits in USDA Zone 8a. Amaranth grows reliably in zones 2a through 11b, so it's a good fit here.

Can Amaranth grow in Madison County's climate?

Yes — Amaranth grows well in Madison County's temperate climate. Madison County averages a 208-day frost-free season, with last frost around April 6 and first frost around October 31.

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Your Madison County Garden Planner — Free

A 22-page printable planner built for Madison County (Zone 8a). 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 Madison County, AL. Local conditions may vary. Last updated: June 2026.

Sources & credits

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