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When to Plant Mulberries in Iberia Parish, LA

Iberia Parish, Louisiana Zone 9b May

May in Iberia Parish, Louisiana — your action list

Each item below is timed to Iberia Parish, Louisiana's frost dates and soil temperatures. Skip nothing, stress about nothing.

Avg. last frost February 13
Avg. first frost December 5
Soil temp (4") 77°F
Watering Low
Pest pressure High
Daylight 13.5 hrs

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Mulberries are fast-growing, long-lived trees that produce abundant sweet-tart berries over an extended harvest period. The berries resemble elongated blackberries.

Iberia Parish, Louisiana is in USDA Zone 9b. The average last spring frost is February 13 and the first fall frost is December 5, giving you a growing season of approximately 295 days.

At an elevation of 114 feet, Iberia Parish receives approximately 60.1 inches of rainfall annually with predominantly sandy loam soil. Summer highs average 101°F, so Mulberries may need afternoon shade and extra watering during peak heat. Sandy soil warms quickly in spring — great for early planting — but Mulberries will need more frequent watering and organic matter to retain nutrients. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Mulberries root diseases.

Iberia Parish, LA (Zone 9b) Year-round
295 days
Last Spring Frost February 13
295 growing days
First Fall Frost December 5
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Iberia Parish Soil Profile

Soil Type

Sandy Loam

Soil pH

5.1-6

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season
Transplant: Feb 14
Recommended (50%) ✓ Fits season
Transplant: Feb 27
Safe Start (90%) ✓ Fits season
Transplant: Mar 23

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 Iberia Parish

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

Soil pH

Your soil pH (5.1–6.0) overlaps with Mulberries's range (5.5–7.0), though not a perfect match.

Soil Texture

Sandy soil in Iberia Parish warms quickly in spring but drains fast. Mulberries will need more frequent watering and regular compost additions to retain nutrients.

Drainage

Drainage is adequate for Mulberries.

Organic Matter

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

How to Plant Mulberries

120"
Between Plants
144"
Between Rows

Plant Water Budget

Plant needs
1.0″/week
Rainfall provides
0.9″/week
Watering frequency Natural rainfall sufficient
Season total 0 gal / 100 sq ft

Monthly Watering Guide for Mulberries

Mulberries needs approximately 1 inches of water per week (4.3" per month). Here's how your county's rainfall compares month by month.

Month Mulberries Needs Rainfall You Supplement Action
Jan 5.5" 0" ❄️ Dormant
Feb 4.3" 4.8" 0" ✅ Rainfall sufficient
Mar 4.3" 6.3" 0" ✅ Rainfall sufficient
Apr 4.3" 5.3" 0" ✅ Rainfall sufficient
May 4.3" 4.7" 0" ✅ Rainfall sufficient
Jun 4.3" 4.9" 0" ✅ Rainfall sufficient
Jul 4.3" 5.9" 0" ✅ Rainfall sufficient
Aug 4.3" 5.3" 0" ✅ Rainfall sufficient
Sep 4.3" 4.5" 0" ✅ Rainfall sufficient
Oct 4.3" 3.8" 0.5" 💧 Light watering
Nov 4.3" 4.7" 0" ✅ Rainfall sufficient
Dec 4.3" 4.5" 0" ✅ Rainfall sufficient

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

Mulberries 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.

Mulberries needs ~32,896 GDD — county provides 7,622 GDD May not mature

Mulberries Planting Timeline — Iberia Parish, LA

Mulberries Planting Calendar

Activity When Date Range
Transplant Outdoors February 27 Feb 27 – Mar 13

· 120" apart · Rows 144" apart

Month-by-Month Timeline

MonthActivities
January
February Transplant Outdoors
March Transplant Outdoors
April
May
June
July
August
September
October
November
December
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Growing Conditions

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

1"/week · Natural rainfall sufficient

📅 Days to Maturity

730–1825 days

🧪 Soil pH

Needs 5.5–7 · Your soil: acceptable

🗺️ USDA Zone

Zone 9b

📆 Growing Season

295 days in Iberia Parish

Growing Tips for Mulberries in Iberia Parish

Direct sow Mulberries outdoors after February 13 in Iberia Parish when soil has warmed and frost danger has passed.

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

With summer highs reaching 101°F in Iberia Parish, provide afternoon shade for Mulberries and water deeply in the morning.

Your 296.0-day growing season in Iberia Parish is tight for Mulberries (730.0-1825.0 days to maturity). Start indoors and choose early-maturing varieties.

General growing tips

Plant away from driveways and patios as fallen berries stain. Minimal pruning is needed. Harvest by shaking branches over a tarp. Birds love mulberries so plant extra.

Companion Planting

Good Companions

Check more plant combinations with our Companion Planting Checker →

Frequently Asked Questions

When should I plant Mulberries in Iberia Parish, LA?

Iberia Parish is in Zone 9b with an average last frost of February 13. Plan your Mulberries planting based on this frost date — see the calendar above for exact timing.

What planting zone is Iberia Parish, LA?

Iberia Parish, Louisiana is in USDA Hardiness Zone 9b. The average last spring frost is February 13 and first fall frost is December 5.

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Your Iberia Parish Garden Planner — Free

A 24-page printable planner built for Iberia Parish (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 Iberia Parish, LA. 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.