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When to Plant Edamame in Bastrop County, TX

Bastrop County, Texas Zone 9a May

Top priorities for Bastrop County, Texas gardeners in May

May is a pivotal month for Bastrop County, Texas gardens. Focus on these tasks first and you'll set up the rest of the season for success.

Avg. last frost February 27
Avg. first frost December 1
Soil temp (4") 64°F
Watering Low
Pest pressure High
Daylight 13.5 hrs
  1. Collect edamame at their peak

    Morning harvests are best — cooler temperatures mean crisper produce and longer fridge life.

June prep starts now
  • First harvests: edamame

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Edamame are soybeans harvested at the immature green stage for a sweet, nutty snack. They are high in protein and easy to grow in warm climates.

Bastrop County, Texas is in USDA Zone 9a. The average last spring frost is February 27 and the first fall frost is December 1, giving you a growing season of approximately 277 days.

At an elevation of 3,716 feet, Bastrop County receives approximately 57 inches of rainfall annually with predominantly clay soil. Summer highs average 91°F, providing good warmth for Edamame during the growing season. Clay soil retains moisture well for Edamame, but amend with compost to improve drainage and prevent root rot. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Edamame root diseases.

Bastrop County, TX (Zone 9a) Year-round
277 days
Last Spring Frost February 27
277 growing days
First Fall Frost December 1
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Bastrop County Soil Profile

Soil Type

Clay

Soil pH

7.2-7.9

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (160 days to spare)
Transplant: Feb 13 🍅 Harvest: May 1 – Jun 12
Recommended (50%) ✓ Fits season (158 days to spare)
Transplant: Feb 27 🍅 Harvest: May 15 – Jun 26
Safe Start (90%) ✓ Fits season (147 days to spare)
Transplant: Mar 22 🍅 Harvest: Jun 7 – Jul 19

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 Bastrop County

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

Soil pH

Your soil pH (7.2–7.9) is more alkaline than Edamame prefers (6.0–7.0). Add sulfur or peat moss to lower pH.

Soil Texture

Heavy clay soil (47% clay) in Bastrop County compacts easily and drains slowly. Amend with compost and avoid working soil when wet.

Organic Matter

Organic matter is moderate (3.0%). Annual compost additions will help Edamame.

How to Plant Edamame

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

Succession Planting Edamame

4
successive plantings in your 277-day season

Sow every 8.6 weeks. Last sowing by Aug 23 to harvest before frost.

Plant Water Budget

Plant needs
0.9″/week
Rainfall provides
0.9″/week
You supply
0.1″/week
Watering frequency Only during dry spells
Season total 115 gal / 100 sq ft
Drought risk

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

Monthly Watering Guide for Edamame

Edamame needs approximately 0.9 inches of water per week (3.9" per month). Here's how your county's rainfall compares month by month.

Month Edamame Needs Rainfall You Supplement Action
Jan 1.5" 0" ❄️ Dormant
Feb 3.9" 2.1" 1.8" 💧 Light watering
Mar 3.9" 4.1" 0" ✅ Rainfall sufficient
Apr 3.9" 6.1" 0" ✅ Rainfall sufficient
May 3.9" 8.8" 0" ✅ Rainfall sufficient
Jun 3.9" 9.4" 0" ✅ Rainfall sufficient
Jul 3.9" 6.7" 0" ✅ Rainfall sufficient
Aug 3.9" 5.8" 0" ✅ Rainfall sufficient
Sep 3.9" 5.6" 0" ✅ Rainfall sufficient
Oct 3.9" 3.5" 0.4" 💧 Light watering
Nov 3.9" 1.9" 2" 🚿 Regular watering
Dec 3.9" 1.5" 2.4" 🚿 Regular watering

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

Edamame 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.

Edamame needs ~1,597 GDD — county provides 5,073 GDD Excellent fit

Edamame Planting Timeline — Bastrop County, TX

Edamame Planting Calendar

Activity When Date Range
Direct Sow March 6 Mar 6 – Mar 27
Harvest May 22 May 22 – Jul 3

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

Month-by-Month Timeline

MonthActivities
January
February
March Direct Sow
April
May Harvest
June Harvest
July Harvest
August
September
October
November
December
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Growing Conditions

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

0.9"/week · Only during dry spells

📅 Days to Maturity

75–100 days

🧪 Soil pH

Needs 6–7 · Your soil: too_alkaline

🗺️ USDA Zone

Zone 9a

📆 Growing Season

277 days in Bastrop County

Growing Tips for Edamame in Bastrop County

Direct sow Edamame outdoors after February 27 in Bastrop County when soil has warmed and frost danger has passed.

With Bastrop County's clay soil (47% clay), work in 3-4 inches of compost before planting Edamame. Avoid tilling when soil is wet to prevent compaction.

Common pests for Edamame in this region include bean beetles and aphids. Use row covers early in the season and inspect plants weekly.

General growing tips

Direct sow after soil is warm. Do not over-fertilize with nitrogen. Harvest when pods are plump and bright green but before they start to yellow. Steam or boil pods before eating.

Companion Planting

Good Companions

Avoid Planting Near

  • Onion
  • Garlic

Check more plant combinations with our Companion Planting Checker →

Frequently Asked Questions

When should I plant Edamame in Bastrop County, TX?

Bastrop County is in Zone 9a with an average last frost of February 27. Plan your Edamame planting based on this frost date — see the calendar above for exact timing.

What planting zone is Bastrop County, TX?

Bastrop County, Texas is in USDA Hardiness Zone 9a. The average last spring frost is February 27 and first fall frost is December 1.

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Your Bastrop County Garden Planner — Free

A 24-page printable planner built for Bastrop 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 Bastrop County, TX. Local conditions may vary. Last updated: May 2026.

Sources & credits

Every number on this page traces back to a primary horticulture or government data source. Click through to verify.