When to Plant Blueberries in St. Tammany Parish, LA
Your April game plan for St. Tammany Parish, Louisiana
We've pulled the most time-sensitive tasks for St. Tammany Parish, Louisiana this April and put them front and centre. Tackle them in order.
Blueberries are long-lived shrubs producing sweet, antioxidant-rich berries. They require acidic soil and are attractive ornamental plants with fall color and spring flowers.
St. Tammany Parish, Louisiana is in USDA Zone 8b. The average last spring frost is February 20 and the first fall frost is November 23, giving you a growing season of approximately 276 days.
At an elevation of 321 feet, St. Tammany Parish receives approximately 57.9 inches of rainfall annually with predominantly sandy loam soil. Summer highs average 96°F, so Blueberries may need afternoon shade and extra watering during peak heat. Sandy soil warms quickly in spring — great for early planting — but Blueberries will need more frequent watering and organic matter to retain nutrients. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Blueberries root diseases.
St. Tammany Parish Soil Profile
Soil Type
Sandy Loam
Soil pH
4.8-6.1
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 St. Tammany Parish
How your county's soil matches Blueberries's growing requirements.
Soil pH
Your soil pH (4.8–6.1) overlaps with Blueberries's range (4.5–5.5), though not a perfect match.
Soil Texture
Sandy soil in St. Tammany Parish warms quickly in spring but drains fast. Blueberries will need more frequent watering and regular compost additions to retain nutrients.
Drainage
Drainage is adequate for Blueberries.
Organic Matter
Organic matter is moderate (2.1%). Annual compost additions will help Blueberries.
How to Plant Blueberries
How Much Blueberries to Grow
For a family of 4, plant approximately 8 blueberries plants in about 192 sq ft. In St. Tammany Parish's 276-day season, you'll have plenty of time for a full harvest. Plan your garden layout →
Plant Water Budget
Monthly Watering Guide for Blueberries
Blueberries needs approximately 1.2 inches of water per week (5.2" per month). Here's how your county's rainfall compares month by month.
| Month | Blueberries Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 4.5" | 0" | ❄️ Dormant |
| Feb | 5.2" | 4.5" | 0.7" | 💧 Light watering |
| Mar | 5.2" | 5.8" | 0" | ✅ Rainfall sufficient |
| Apr | 5.2" | 4.2" | 1" | 💧 Light watering |
| May | 5.2" | 5.2" | 0" | ✅ Rainfall sufficient |
| Jun | 5.2" | 4.6" | 0.6" | 💧 Light watering |
| Jul | 5.2" | 6.8" | 0" | ✅ Rainfall sufficient |
| Aug | 5.2" | 5.3" | 0" | ✅ Rainfall sufficient |
| Sep | 5.2" | 4.2" | 1" | 💧 Light watering |
| Oct | 5.2" | 4.1" | 1.1" | 💧 Light watering |
| Nov | 5.2" | 4.3" | 0.9" | 💧 Light watering |
| Dec | — | 4.3" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Feb–Nov in St. Tammany Parish). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Blueberries 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.
Blueberries Planting Timeline — St. Tammany Parish, LA
Blueberries Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Transplant Outdoors | March 13 | Mar 13 – Mar 27 |
· 48" apart · Rows 72" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | Transplant Outdoors |
| April | — |
| May | — |
| June | — |
| July | — |
| August | — |
| September | — |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
1.2"/week · Natural rainfall sufficient
📅 Days to Maturity
730–1095 days
🧪 Soil pH
Needs 4.5–5.5 · Your soil: acceptable
🗺️ USDA Zone
Zone 8b
📆 Growing Season
276 days in St. Tammany Parish
Growing Tips for Blueberries in St. Tammany Parish
Direct sow Blueberries outdoors after February 20 in St. Tammany Parish when soil has warmed and frost danger has passed.
Sandy soil in St. Tammany Parish dries quickly — mulch Blueberries with 2-3 inches of straw and water deeply 2-3 times per week rather than lightly every day.
With summer highs reaching 96°F in St. Tammany Parish, provide afternoon shade for Blueberries and water deeply in the morning.
Your 277.0-day growing season in St. Tammany Parish is tight for Blueberries (730.0-1095.0 days to maturity). Start indoors and choose early-maturing varieties.
General growing tips
Plant at least two varieties for cross-pollination. Acidify soil with sulfur or pine needle mulch to maintain pH 4.5-5.5. Protect ripening berries from birds with netting.
Companion Planting
Good Companions
Check more plant combinations with our Companion Planting Checker →
Blueberries in Other Locations
Frequently Asked Questions
When should I plant Blueberries in St. Tammany Parish, LA?
St. Tammany Parish is in Zone 8b with an average last frost of February 20. Plan your Blueberries planting based on this frost date — see the calendar above for exact timing.
What planting zone is St. Tammany Parish, LA?
St. Tammany Parish, Louisiana is in USDA Hardiness Zone 8b. The average last spring frost is February 20 and first fall frost is November 23.
Your St. Tammany Parish Garden Planner — Free
A 24-page printable planner built for St. Tammany Parish (Zone 8b). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.