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When to Plant Amaranth in Rapides Parish, LA

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.

Rapides Parish, Louisiana is in USDA Zone 8b. The average last spring frost is March 5 and the first fall frost is November 16, giving you a growing season of approximately 256 days.

At an elevation of 388 feet, Rapides Parish receives approximately 54.4 inches of rainfall annually with predominantly loam soil. Summer highs average 91ยฐF, providing good warmth for Amaranth during the growing season. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Amaranth root diseases.

Rapides Parish, LA (Zone 8b) Long season
256 days
Last Spring Frost March 5
256 growing days
First Fall Frost November 16

Rapides Parish Soil Profile

Soil Type

Loam

Soil pH

5.9-7.2

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (108 days to spare)
Start indoors: Jan 4 Transplant: Mar 8 🍅 Harvest: Jun 7 – Jul 26
Recommended (50%) ✓ Fits season (102 days to spare)
Start indoors: Jan 15 Transplant: Mar 19 🍅 Harvest: Jun 18 – Aug 6
Safe Start (90%) ✓ Fits season (98 days to spare)
Start indoors: Feb 16 Transplant: Apr 20 🍅 Harvest: Jul 20 – Sep 7

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.

Plant Water Budget

Plant needs
1.0″/week
Rainfall provides
0.9″/week
You supply
0.1″/week
Watering frequency Only during dry spells
Season total 245 gal / 100 sq ft
Amaranth needs ~1,916 GDD — county provides 4,672 GDD Excellent fit

Amaranth Planting Timeline โ€” Rapides Parish, LA

Amaranth Planting Calendar

Activity When Date Range
Start Indoors January 15 Jan 15 โ€“ Jan 29
Transplant Outdoors March 19 Mar 19 โ€“ Apr 2
Direct Sow March 12 Mar 12 โ€“ Apr 2
Harvest June 18 Jun 18 โ€“ Aug 6

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

Month-by-Month Timeline

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

Growing Conditions

Sun

Full Sun (6-8+ hours)

Water

Moderate โ€” regular watering

Days to Maturity

90โ€“120 days

Soil pH

6 โ€“ 7.5

USDA Zone

Zone 8b

Growing Season

256 days

Growing Tips for Rapides Parish

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

Level Up Your Garden

Frequently Asked Questions

When should I plant Amaranth in Rapides Parish, LA?

Rapides Parish is in Zone 8b with an average last frost of March 5. Plan your Amaranth planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Rapides Parish, LA?

Rapides Parish, Louisiana is in USDA Hardiness Zone 8b. The average last spring frost is March 5 and first fall frost is November 16.

๐ŸŒฑ

Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Rapides Parish gardeners in Zone 8b organize planting dates, track what's growing, and never miss a planting window.

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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 Rapides Parish, LA. Local conditions may vary. Last updated: April 2026.