When to Plant Watercress in Beauregard Parish, LA
Your May game plan for Beauregard Parish, Louisiana
Welcome to May in Zone 9a. These are the moves that will have the biggest impact on your growing season.
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Pick watercress
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Watercress is a semi-aquatic plant with a peppery, tangy flavor rich in vitamins and minerals. It grows naturally along streams and can be cultivated in containers with standing water.
Beauregard Parish, Louisiana is in USDA Zone 9a. The average last spring frost is March 7 and the first fall frost is November 16, giving you a growing season of approximately 254 days.
At an elevation of 206 feet, Beauregard Parish receives approximately 49.3 inches of rainfall annually with predominantly sandy loam soil. Summer highs average 91°F, providing good warmth for Watercress during the growing season. Sandy soil warms quickly in spring — great for early planting — but Watercress will need more frequent watering and organic matter to retain nutrients.
Beauregard Parish Soil Profile
Soil Type
Sandy Loam
Soil pH
4.8-6.2
Drainage
Well Drained
Plant Planting Risk Windows
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 Beauregard Parish
How your county's soil matches Watercress's growing requirements.
Soil pH
Your soil pH (4.8–6.2) is more acidic than Watercress prefers (6.5–7.5). Add garden lime to raise pH.
Soil Texture
Sandy soil in Beauregard Parish warms quickly in spring but drains fast. Watercress will need more frequent watering and regular compost additions to retain nutrients.
Organic Matter
Organic matter is low (1.7%). Add 2-3 inches of compost before planting Watercress.
How to Plant Watercress
Fall planting: Sow 8 weeks before your first frost date for a fall harvest.
Succession Planting Watercress
Sow every 4.6 weeks. Last sowing by Sep 17 to harvest before frost.
For a dedicated fall crop, sow by Sep 21.
Plant Water Budget
Water stress score is 6/10 — consider drought-tolerant varieties and mulching
Monthly Watering Guide for Watercress
Watercress needs approximately 1.5 inches of water per week (6.5" per month). Here's how your county's rainfall compares month by month.
| Month | Watercress Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 3.8" | 0" | ❄️ Dormant |
| Feb | — | 4.5" | 0" | ❄️ Dormant |
| Mar | 6.5" | 4.2" | 2.3" | 💧 Light watering |
| Apr | 6.5" | 3.4" | 3.1" | 💧 Light watering |
| May | 6.5" | 4.2" | 2.3" | 💧 Light watering |
| Jun | 6.5" | 4" | 2.5" | 💧 Light watering |
| Jul | 6.5" | 5.4" | 1.1" | 💧 Light watering |
| Aug | 6.5" | 4.8" | 1.7" | 💧 Light watering |
| Sep | 6.5" | 4.4" | 2.1" | 💧 Light watering |
| Oct | 6.5" | 3.3" | 3.2" | 💧 Light watering |
| Nov | 6.5" | 3.9" | 2.6" | 💧 Light watering |
| Dec | — | 3.5" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Mar–Nov in Beauregard Parish). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Watercress 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.
Watercress Planting Timeline — Beauregard Parish, LA
Watercress Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | February 7 | Feb 7 – Feb 21 |
| Transplant Outdoors | March 7 | Mar 7 – Mar 21 |
| Direct Sow | February 14 | Feb 14 – Mar 7 |
| Harvest | April 18 | Apr 18 – May 23 |
| Fall Sowing | September 21 | Sep 21 – Oct 5 |
Plant 0.5" deep · 6" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | Start Indoors Direct Sow |
| March | Transplant Outdoors Direct Sow |
| April | Harvest |
| May | Harvest |
| June | — |
| July | — |
| August | — |
| September | Fall Sowing |
| October | Fall Sowing |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Partial Shade (3-6 hours)
💧 Water
1.5"/week · 2-3 times/week
📅 Days to Maturity
40–60 days
🧪 Soil pH
Needs 6.5–7.5 · Your soil: too_acidic
🗺️ USDA Zone
Zone 9a
📆 Growing Season
254 days in Beauregard Parish
Growing Tips for Watercress in Beauregard Parish
Direct sow Watercress outdoors after March 07 in Beauregard Parish when soil has warmed and frost danger has passed.
Sandy soil in Beauregard Parish dries quickly — mulch Watercress with 2-3 inches of straw and water deeply 2-3 times per week rather than lightly every day.
Your generous 254.0-day season in Beauregard Parish allows multiple plantings of Watercress. Sow every 20.0 days for continuous harvest.
Common pests for Watercress in this region include cabbage worm and flea beetles. Use row covers early in the season and inspect plants weekly.
General growing tips
Grow in containers with trays of water kept fresh. Provide partial shade and cool conditions. Harvest stems by cutting above water level. Replace water frequently to prevent stagnation.
Companion Planting
Good Companions
Check more plant combinations with our Companion Planting Checker →
Watercress in Other Locations
Frequently Asked Questions
When should I plant Watercress in Beauregard Parish, LA?
Beauregard Parish is in Zone 9a with an average last frost of March 7. Plan your Watercress planting based on this frost date — see the calendar above for exact timing.
What planting zone is Beauregard Parish, LA?
Beauregard Parish, Louisiana is in USDA Hardiness Zone 9a. The average last spring frost is March 7 and first fall frost is November 16.
Your Beauregard Parish Garden Planner — Free
A 24-page printable planner built for Beauregard Parish (Zone 9a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.