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When to plant Amaranth in Hampton, FL

In Zone 9a (Hampton), direct-sow Amaranth between March 1 and March 22 for spring, after the March 1 last-frost mark.

When to Plant Amaranth in Hampton, FL

Bradford County, Florida Zone 9a August

Your August planting checklist for Bradford County, Florida

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

Avg. last frost March 1
Avg. first frost November 28
Soil temp (4") 95°F
Watering Low
Pest pressure High
Daylight 13.1 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.

Hampton, Florida is in USDA Zone 9a. The average last spring frost is March 1 and the first fall frost is November 28, giving you a growing season of approximately 272 days.

At an elevation of 297 feet, Bradford County receives approximately 51.9 inches of rainfall annually with predominantly sand soil. Summer highs average 98°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.

Hampton, FL (Zone 9a) Year-round
272 days
Last Spring Frost March 1
272 growing days
First Fall Frost November 28

Hampton Soil Profile

Soil Type

Sand

Soil pH

4.9-6.1

Drainage

Well Drained

Amaranth Planting Risk Windows

Early Start (70% safe) ✓ Fits season (132 days to spare)
Start indoors: Jan 3 Transplant: Feb 21 🍅 Harvest: May 23 – Jul 11
Recommended (50%) ✓ Fits season (125 days to spare)
Start indoors: Jan 18 Transplant: Mar 8 🍅 Harvest: Jun 7 – Jul 26
Safe Start (90%) ✓ Fits season (126 days to spare)
Start indoors: Feb 8 Transplant: Mar 29 🍅 Harvest: Jun 28 – Aug 16

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 Hampton

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

Soil pH

Your soil pH (4.9–6.1) is more acidic than Amaranth prefers (6.0–7.5). Add garden lime to raise pH.

Soil Texture

Sandy soil in Bradford 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
0.8″/week
You supply
0.5″/week
Watering frequency 1-2 times/week
Season total 1,207 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 2.3" 0" ❄️ Dormant
Feb 2.5" 0" ❄️ Dormant
Mar 4.3" 3.3" 1" 💧 Light watering
Apr 4.3" 2.6" 1.7" 💧 Light watering
May 4.3" 3.2" 1.1" 💧 Light watering
Jun 4.3" 6.9" 0" ✅ Rainfall sufficient
Jul 4.3" 8.7" 0" ✅ Rainfall sufficient
Aug 4.3" 7.1" 0" ✅ Rainfall sufficient
Sep 4.3" 6.9" 0" ✅ Rainfall sufficient
Oct 4.3" 4" 0.3" 💧 Light watering
Nov 4.3" 2.1" 2.2" 🚿 Regular watering
Dec 2.2" 0" ❄️ Dormant

Water needs are for active growing months only (Mar–Nov in Bradford 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 ~2,468 GDD — county provides 6,392 GDD Excellent fit

Amaranth Planting Timeline — Hampton, FL

Amaranth Planting Calendar

Activity When Date Range
Start Indoors January 18 Jan 18 – Feb 1
Transplant Outdoors March 8 Mar 8 – Mar 22
Direct Sow March 1 Mar 1 – Mar 22
Harvest June 7 Jun 7 – Jul 26

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
May
June Harvest
July Harvest
August
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

272 days in Bradford County

Growing Tips for Amaranth in Hampton

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

Sandy soil in Bradford 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 98°F in Bradford 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 Hampton, FL?

In Hampton, FL, plant Amaranth after the last frost (around March 1) and before the first frost (around November 28). Best results when soil holds above 50°F.

What growing zone is Hampton, FL for Amaranth?

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

Can Amaranth grow in Hampton's climate?

Yes — Amaranth grows well in Hampton's temperate climate. Hampton averages a 272-day frost-free season, with last frost around March 1 and first frost around November 28.

🌱

Your Bradford County Garden Planner — Free

A 22-page printable planner built for Bradford 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 Bradford County, FL. Local conditions may vary. Last updated: August 2026.