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When to plant Amaranth in Arcadia, FL

Plant Amaranth in Arcadia from February 1 to February 22 in spring. Arcadia sits in USDA Zone 9b, with last frost around February 1 and first frost on December 20.

When to Plant Amaranth in Arcadia, FL

DeSoto County, Florida Zone 9b June

What to do in June

June rewards gardeners who work with the weather, not against it. Here's how to stay in step this month in DeSoto County, Florida.

Avg. last frost February 1
Avg. first frost December 20
Soil temp (4") 89°F
Watering Low
Pest pressure High
Daylight 13.7 hrs
  1. Start harvesting amaranth

    Taste as you pick. The first ripe produce is the best feedback loop you'll get all season.

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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.

Arcadia, Florida is in USDA Zone 9b. The average last spring frost is February 1 and the first fall frost is December 20, giving you a growing season of approximately 322 days.

At an elevation of 214 feet, DeSoto County receives approximately 53.6 inches of rainfall annually with predominantly sand soil. Summer highs average 97°F, so Amaranth may need afternoon shade and extra watering during peak heat. Sandy soil warms quickly in spring — great for early planting — but Amaranth will need more frequent watering and organic matter to retain nutrients. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Amaranth root diseases.

Arcadia, FL (Zone 9b) Year-round
322 days
Last Spring Frost February 1
322 growing days
First Fall Frost December 20

Arcadia Soil Profile

Soil Type

Sand

Soil pH

5-6

Drainage

Well Drained

Amaranth Planting Risk Windows

Early Start (70% safe) ✓ Fits season (175 days to spare)
Start indoors: Dec 11 Transplant: Jan 29 🍅 Harvest: Apr 30 – Jun 18
Recommended (50%) ✓ Fits season (175 days to spare)
Start indoors: Dec 21 Transplant: Feb 8 🍅 Harvest: May 10 – Jun 28
Safe Start (90%) ✓ Fits season (151 days to spare)
Start indoors: Jan 19 Transplant: Mar 9 🍅 Harvest: Jun 8 – Jul 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 Arcadia

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

Soil pH

Your soil pH (5.0–6.0) is more acidic than Amaranth prefers (6.0–7.5). Add garden lime to raise pH.

Soil Texture

Sandy soil in DeSoto County warms quickly in spring but drains fast. Amaranth will need more frequent watering and regular compost additions to retain nutrients.

Drainage

Drainage is adequate for Amaranth.

Organic Matter

Organic matter is low (1.7%). Add 2-3 inches of compost before planting Amaranth.

How to Plant Amaranth

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

Amaranth Water Budget

Plant needs
1.0″/week
Rainfall provides
0.7″/week
You supply
0.6″/week
Watering frequency 1-2 times/week
Season total 1,734 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 2.5" 0" ❄️ Dormant
Feb 4.3" 2.5" 1.8" 💧 Light watering
Mar 4.3" 3.7" 0.6" 💧 Light watering
Apr 4.3" 2.7" 1.6" 💧 Light watering
May 4.3" 3.4" 0.9" 💧 Light watering
Jun 4.3" 8.3" 0" ✅ Rainfall sufficient
Jul 4.3" 7.5" 0" ✅ Rainfall sufficient
Aug 4.3" 6.8" 0" ✅ Rainfall sufficient
Sep 4.3" 6.1" 0" ✅ Rainfall sufficient
Oct 4.3" 5.2" 0" ✅ Rainfall sufficient
Nov 4.3" 2.5" 1.8" 💧 Light watering
Dec 4.3" 2.4" 1.9" 💧 Light watering

Water needs are for active growing months only (Feb–Dec in DeSoto 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 ~2,389 GDD — county provides 7,348 GDD Excellent fit

Amaranth Planting Timeline — Arcadia, FL

Amaranth Planting Calendar

Activity When Date Range
Start Indoors December 21 Dec 21 – Jan 4
Transplant Outdoors February 8 Feb 8 – Feb 22
Direct Sow February 1 Feb 1 – Feb 22
Harvest May 10 May 10 – Jun 28

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

Month-by-Month Timeline

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

Growing Conditions

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

1"/week · 1-2 times/week

📅 Days to Maturity

90–120 days

🧪 Soil pH

Needs 6–7.5 · Your soil: too_acidic

🗺️ USDA Zone

Zone 9b

📆 Growing Season

322 days in DeSoto County

Growing Tips for Amaranth in Arcadia

Direct sow Amaranth outdoors after February 01 in DeSoto County when soil has warmed and frost danger has passed.

Sandy soil in DeSoto County dries quickly — mulch Amaranth with 2-3 inches of straw and water deeply 2-3 times per week rather than lightly every day.

With summer highs reaching 97°F in DeSoto County, provide afternoon shade for Amaranth and water deeply in the morning.

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 →

When should I plant Amaranth in Arcadia, FL?

In Arcadia, FL, plant Amaranth after the last frost (around February 1) and before the first frost (around December 20). Best results when soil holds above 50°F.

What growing zone is Arcadia, FL for Amaranth?

Arcadia sits in USDA Zone 9b. Amaranth grows reliably in zones 2a through 11b, so it's a good fit here.

Can Amaranth grow in Arcadia's climate?

Yes — Amaranth grows well in Arcadia's temperate climate. Arcadia averages a 323-day frost-free season, with last frost around February 1 and first frost around December 20.

🌱

Your DeSoto County Garden Planner — Free

A 22-page printable planner built for DeSoto County (Zone 9b). 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 DeSoto County, FL. Local conditions may vary. Last updated: June 2026.