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When to plant Amaranth in Crestview, FL

In Zone 9a (Crestview), direct-sow Amaranth between March 14 and April 4 for spring, after the March 14 last-frost mark.

When to Plant Amaranth in Crestview, FL

Okaloosa County, Florida Zone 9a August

Your August game plan for Okaloosa County, Florida

A quick August briefing for Okaloosa County, Florida gardeners — what's urgent, what's next, and what can wait.

Avg. last frost March 14
Avg. first frost November 16
Soil temp (4") 90°F
Watering Low
Pest pressure High
Daylight 13.1 hrs
  1. It's harvest week for amaranth

    If you can't use it all right away, check the food-preservation section of your planner.

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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.

Crestview, Florida is in USDA Zone 9a. The average last spring frost is March 14 and the first fall frost is November 16, giving you a growing season of approximately 247 days.

At an elevation of 396 feet, Okaloosa County receives approximately 48.4 inches of rainfall annually with predominantly sand soil. Summer highs average 92°F, providing good warmth for Amaranth during the growing season. Sandy soil warms quickly in spring — great for early planting — but Amaranth will need more frequent watering and organic matter to retain nutrients.

Crestview, FL (Zone 9a) Long season
247 days
Last Spring Frost March 14
247 growing days
First Fall Frost November 16

Crestview Soil Profile

Soil Type

Sand

Soil pH

4.9-5.8

Drainage

Well Drained

Amaranth Planting Risk Windows

Early Start (70% safe) ✓ Fits season (103 days to spare)
Start indoors: Jan 23 Transplant: Mar 13 🍅 Harvest: Jun 12 – Jul 31
Recommended (50%) ✓ Fits season (100 days to spare)
Start indoors: Jan 31 Transplant: Mar 21 🍅 Harvest: Jun 20 – Aug 8
Safe Start (90%) ✓ Fits season (99 days to spare)
Start indoors: Feb 24 Transplant: Apr 14 🍅 Harvest: Jul 14 – Sep 1

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 Crestview

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

Soil pH

Your soil pH (4.9–5.8) is more acidic than Amaranth prefers (6.0–7.5). Add garden lime to raise pH.

Soil Texture

Sandy soil in Okaloosa 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 (1.6%). 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
0.8″/week
You supply
0.6″/week
Watering frequency 1-2 times/week
Season total 1,258 gal / 100 sq ft
Drought risk

Water stress score is 6/10 — consider drought-tolerant varieties and mulching

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 2.1" 0" ❄️ Dormant
Feb 2.4" 0" ❄️ Dormant
Mar 4.3" 2.7" 1.6" 💧 Light watering
Apr 4.3" 2.3" 2" 💧 Light watering
May 4.3" 3.5" 0.8" 💧 Light watering
Jun 4.3" 6.1" 0" ✅ Rainfall sufficient
Jul 4.3" 8.5" 0" ✅ Rainfall sufficient
Aug 4.3" 6.3" 0" ✅ Rainfall sufficient
Sep 4.3" 6.4" 0" ✅ Rainfall sufficient
Oct 4.3" 4" 0.3" 💧 Light watering
Nov 4.3" 2.3" 2" 💧 Light watering
Dec 1.8" 0" ❄️ Dormant

Water needs are for active growing months only (Mar–Nov in Okaloosa 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 ~1,995 GDD — county provides 4,693 GDD Excellent fit

Amaranth Planting Timeline — Crestview, FL

Amaranth Planting Calendar

Activity When Date Range
Start Indoors January 31 Jan 31 – Feb 14
Transplant Outdoors March 21 Mar 21 – Apr 4
Direct Sow March 14 Mar 14 – Apr 4
Harvest June 20 Jun 20 – Aug 8

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

Month-by-Month Timeline

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

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 9a

📆 Growing Season

247 days in Okaloosa County

Growing Tips for Amaranth in Crestview

Direct sow Amaranth outdoors after March 14 in Okaloosa County when soil has warmed and frost danger has passed.

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

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 Crestview, FL?

In Crestview, FL, plant Amaranth after the last frost (around March 14) and before the first frost (around November 16). Best results when soil holds above 50°F.

What growing zone is Crestview, FL for Amaranth?

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

Can Amaranth grow in Crestview's climate?

Yes — Amaranth grows well in Crestview's temperate climate. Crestview averages a 247-day frost-free season, with last frost around March 14 and first frost around November 16.

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