St. Mary Parish, LA — Planting Guide
St. Mary Parish, Louisiana gardeners: here's your May plan
May is a pivotal month for St. Mary Parish, Louisiana gardens. Focus on these tasks first and you'll set up the rest of the season for success.
-
Basket week: basil, carrots, and cucumber
The more you pick, the more the plant produces. Letting fruit overripen tells the plant it's time to stop.
To set up a strong June, finish these tasks
- First harvests: basil, cucumber, and green beans
St. Mary Parish is in USDA Zone 9b. The average last spring frost is February 14 and the first fall frost is December 5, giving you a growing season of approximately 295 days.
At an elevation of 252 ft, St. Mary Parish receives approximately 48.5 in of rainfall annually. Summer highs average 95°F with winter lows around 45°F. The predominant soil type is Sandy Loam.
Based on 31 years of NOAA climate station data, the last frost date here varies by 51 days year to year — ranging from January 20 in warm years to March 11 in cold years. The growing season is trending shorter by about 2.47 days per decade. St. Mary Parish scores 49/100 (Moderate) on the Microclimate Index.
🌡️ Zone
9b (°F to °F min)
❄️ Last Frost
February 14
🍂 First Frost
December 5
📅 Growing Season
295 days
⛰️ Elevation
252 ft
🌧️ Annual Rainfall
48.5 in
Monthly Watering Calendar
When you'll need to water your garden — based on average monthly rainfall vs. the ~1 inch/week most gardens need.
View detailed monthly data
| Month | Avg Rainfall | Rainy Days | Extra Water Needed | Watering Effort |
|---|---|---|---|---|
| Jan | 3.6 in | 11 days | — | None |
| Feb | 3.4 in | 9 days | 0.9 in | Moderate |
| Mar | 5.1 in | 11 days | — | Low |
| Apr | 3.8 in | 7 days | 0.5 in | Low |
| May | 3.8 in | 10 days | 0.5 in | Low |
| Jun | 3.6 in | 10 days | 0.7 in | Moderate |
| Jul | 5.6 in | 12 days | — | Low |
| Aug | 5.1 in | 10 days | — | Low |
| Sep | 3.5 in | 8 days | 0.8 in | Moderate |
| Oct | 3.1 in | 7 days | 1.2 in | Moderate |
| Nov | 3.9 in | 8 days | 0.4 in | Low |
| Dec | 4.2 in | 10 days | — | None |
Annual total: 48.7 in. Water needs vary by crop — tomatoes need ~1.2"/week while herbs like rosemary need only 0.3"/week. Check individual plant pages for crop-specific water budgets that factor in your county's rainfall and soil drainage.
St. Mary Parish Soil Profile
Soil Type
Sandy Loam
Soil pH
4.8-6.4
Drainage
Well Drained
Frost Risk Probability
Based on 31 years of NOAA weather station data from 3 stations
Beginners: Plant frost-sensitive crops (tomatoes, peppers, squash) after the "Safe" date on the left. Harvest or cover them before the "Protect by" date on the right. Hardy crops (lettuce, peas, kale) can go in the yellow transition zones.
How to read this table: "Conservative" means you're safe from frost 9 out of 10 years — best for beginners and frost-sensitive crops. "Average year" is the typical date. "Aggressive" means only 1 in 10 years is that warm — experienced gardeners with frost protection can try these dates.
| Planting Strategy | Last Spring Frost | First Fall Frost | Frost-Free Days |
|---|---|---|---|
| Conservative (safest) | Mar 11 | Dec 20 | 284 days |
| Cautious | Mar 2 | Dec 10 | 283 days |
| Average year | Feb 14 | Dec 5 | 294 days |
| Optimistic | Feb 5 | Nov 27 | 295 days |
| Aggressive (risky) | Jan 20 | Nov 15 | 299 days |
Not very — frost dates can vary by ±51 days year-to-year. Use the "Conservative" row in the table below, and keep row covers handy for surprise late frosts.
Yes — growing seasons are getting shorter here (about 2.5 days per decade). Use the "Conservative" dates and choose fast-maturing varieties.
Gardening Difficulty Score
St. Mary Parish presents some gardening challenges. Choose adapted varieties and plan around frost dates.
Local Gardening Help in St. Mary Parish
Free expert help is closer than you think. Your county's cooperative extension office connects you with trained gardeners, soil testing labs, and local programs — all specific to St. Mary Parish's climate and soil.
County Extension Office
St. Mary Parish LSU AgCenter Extension Extension Office
Phone: 225-578-4161
Visit Extension Office Website →
Extension offices are run by land-grant universities and funded by the USDA. Their advice is free, research-based, and tailored to your county's specific conditions.
Master Gardener Program
Free gardening help from trained volunteers
Master Gardeners are community volunteers who complete 40–60 hours of university horticultural training. They answer gardening questions, diagnose plant problems, and offer workshops — all free.
Many extension offices run a Master Gardener hotline where you can call or email with photos of plant problems for free diagnosis.
Soil Testing
Available through your extension office
Before amending your soil, get it tested. Your extension office offers soil testing (typically $10–$25) that tells you exact pH, nutrient levels, and amendment recommendations specific to what you want to grow.
Services Available in St. Mary Parish
Finding local nurseries & garden centers in St. Mary Parish
Why Buy Local
Local nurseries carry plants that are proven to grow in your area. Staff can give you advice specific to St. Mary Parish's soil and climate that big-box stores can't. Plants from local growers are typically hardier because they're already acclimated to your zone.
How to Find Them
Search for "nurseries near St. Mary Parish LA" or "garden center St. Mary Parish" on Google Maps. Also check with your extension office — they often maintain lists of reputable local nurseries and plant sales.
Community gardens & gardening groups
Community gardens are a great way to learn from experienced gardeners in your area, especially if you're limited on space. Search "community garden St. Mary Parish LA" or check your extension office and local parks department. Facebook groups like "St. Mary Parish Gardeners" or "Louisiana Gardening" are also excellent for local advice and plant swaps.
What to Plant After Your Harvest
After your first crops finish, use the remaining frost-free days to grow a second round.
Show 6 more succession options
Sunlight & Day Length
Monthly daylight hours and peak sun — critical for onion varieties, photoperiod-sensitive plants, and solar garden planning.
Longest Day
13.9 hours
Summer solstice daylight
Shortest Day
10.1 hours
Winter solstice daylight
Peak Sun Hours
8.7 hr/day peak (summer)
Peak sun hours (green dashed line below) account for cloud cover — this is the usable direct sunlight your garden actually receives. Most vegetables need 6+ peak sun hours.
Onion tip: Your shorter days favor short-day onion varieties like Vidalia, Texas 1015, and Red Creole. Plant in fall for best results.
View detailed monthly data
| Month | Daylight Hours | Peak Sun Hours | Day Length |
|---|---|---|---|
| January | 10.3 hr | 5 hr | Short day |
| February | 11 hr | 5.9 hr | Short day |
| March | 11.8 hr | 6.3 hr | Short day |
| April | 12.7 hr | 7.7 hr | Neutral |
| May | 13.5 hr | 8.7 hr | Neutral |
| June | 13.9 hr | 8.4 hr | Neutral |
| July | 13.7 hr | 7.7 hr | Neutral |
| August | 13.1 hr | 7.1 hr | Neutral |
| September | 12.2 hr | 7.1 hr | Neutral |
| October | 11.3 hr | 7.3 hr | Short day |
| November | 10.5 hr | 5.5 hr | Short day |
| December | 10.1 hr | 4.8 hr | Short day |
Peak sun hours factor in typical cloud cover — use these for solar panel and shade-planning calculations.
Soil Temperature & Composting Calendar
Monthly soil temps tell you when to plant warm-season crops, and when your compost pile is actively working.
Plant Warm Crops When
Soil reaches 60°F+
Soil warm enough from Mar through Nov.
Best Month to Compost
Apr
Microbial activity peaks when soil is warm.
Active Composting
12 months
Nearly year-round composting.
View detailed monthly data
| Month | Soil 4" Deep | Soil 8" Deep | Compost Activity | Time to Finish |
|---|---|---|---|---|
| Jan | 51°F | 60°F | ♻️ Active | ~14 weeks |
| Feb | 52°F | 59°F | ♻️ Active | ~14 weeks |
| Mar | 62°F | 63°F | ♻️ Active | ~14 weeks |
| Apr | 69°F | 68°F | 🔥 Peak | ~8 weeks |
| May | 77°F | 77°F | 🔥 Peak | ~8 weeks |
| Jun | 85°F | 83°F | 🔥 Peak | ~8 weeks |
| Jul | 97°F | 90°F | 🔥 Peak | ~8 weeks |
| Aug | 98°F | 92°F | 🔥 Peak | ~8 weeks |
| Sep | 90°F | 89°F | 🔥 Peak | ~8 weeks |
| Oct | 80°F | 82°F | 🔥 Peak | ~8 weeks |
| Nov | 69°F | 73°F | 🔥 Peak | ~8 weeks |
| Dec | 59°F | 65°F | ♻️ Active | ~14 weeks |
Highlighted rows = soil 60°F+ (safe for warm-season transplants). Compost finishes fastest during peak activity months.
Pest & Disease Pressure in St. Mary Parish
Computed from local climate patterns — warmer, humid conditions increase pest generations and fungal disease risk.
Insect Pest Pressure
High — expect multiple pest generations. Preventative measures essential.
Disease Risk
High fungal/bacterial risk. Space plants for airflow, water at soil level.
Seasonal Risk
View 6 common pests in your area
| Pest | Risk Level | Peak Months |
|---|---|---|
| Aphids | High | Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov |
| Whiteflies | High | Apr, May, Jun, Jul, Aug, Sep, Oct, Nov |
| Spider mites | High | May, Jun, Jul, Aug, Sep, Oct |
| Fire ants | High | Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov |
| Thrips | Moderate | Apr, May, Jun, Jul, Aug |
| Leaf miners | Low | Mar, Apr, May, Jun |
Organic pest management tips
- Install physical barriers: floating row covers, copper tape for slugs, mesh netting
- Apply Bt (Bacillus thuringiensis) for caterpillar control — safe for beneficial insects
- Use kaolin clay spray to deter a wide range of insects on fruiting crops
- Release beneficial insects: ladybugs for aphids, parasitic wasps for caterpillars
- Apply neem oil weekly during high-pressure months
- Mulch heavily (3-4 inches) to reduce soil-borne disease splash
Cover Crops for St. Mary Parish
Cover crops protect bare soil, fix nitrogen, suppress weeds, and improve soil structure — with county-specific planting dates.
Spring Cover Crops (4 options) — Build soil before the main growing season
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Buckwheat | Feb 16 | Oct 3 | — | Rapid growth, attracts pollinators, suppresses weeds |
| Cowpeas (southern peas) | Feb 24 | Oct 3 | ✓ Yes | Excellent nitrogen fixer for warm climates, edible |
| Sorghum-sudan grass | Feb 23 | Sep 26 | — | Massive biomass, breaks compaction, suppresses nematodes |
| White clover | Jan 16 | Sep 26 | ✓ Yes | Living mulch, fixes nitrogen, permanent ground cover |
Summer Cover Crops (1 options) — Fill gaps and suppress weeds between plantings
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Sunflowers | Mar 15 | Nov 7 | — | Deep roots break compaction, attract pollinators and beneficial insects |
Fall Cover Crops (4 options) — Plant after harvest to protect soil over winter
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Austrian winter peas | Oct 1 | Jan 24 | ✓ Yes | Fixes nitrogen, good for heavy clay soils |
| Crimson clover | Oct 8 | Jan 31 | ✓ Yes | Fixes nitrogen, attracts pollinators in spring |
| Daikon radish | Oct 16 | Jan 24 | — | Deep taproot breaks compaction, excellent for clay soils |
| Hairy vetch | Sep 10 | Jan 24 | ✓ Yes | Excellent nitrogen fixer, good for depleted soils |
Wind & Microclimate
Wind dries soil, stresses plants, and affects frost patterns. Understanding your exposure helps with garden placement.
Seasonal Wind Speed
Spring: 8 mph Summer: 8 mph
Fall: 7 mph Winter: 9 mph
Prevailing wind: SW. Moderate wind — consider a temporary windbreak for young seedlings.
Windbreak Benefit
3.4/10
Low need — wind is not a major factor in your garden planning.
Frost Pocket Risk
Moderate
Some terrain variation (542 ft range). Garden on slopes or higher ground if possible to avoid late-season frost pockets.
Rainwater Harvesting Potential
How much water you can collect, when to collect it, and what size system you need for your garden.
Annual Collection
24,272 gal
Per 1,000 sq ft of roof area (at 80% collection efficiency)
Recommended Setup
6 rain barrels (55 gal each)
For a typical 500 sq ft garden. Serious collectors: consider a 500 gal tank.
Legal Status
Unrestricted
Rainwater harvesting is fully legal in your state with no restrictions.
Best Collection Months
Mar, Jul, Aug, Dec
Highest rainfall months — your barrels will fill up quickly during these months.
Months to Draw From Storage
Feb, Sep, Oct
Dry months when you'll rely on stored water — size your storage for this gap.
Rainwater collection tips for your area
- Your county receives approximately 48.7 inches of rain per year
- A 1,000 sq ft roof can collect roughly 24,272 gallons annually
- Rainwater harvesting is fully legal in your state
- Stock up on stored water before your dry season (Feb, Sep, Oct)
- Use a first-flush diverter to keep roof debris out of your collection
Soil & Growing Conditions in St. Mary Parish
Soil Type
Sandy Loam
Soil pH 4.8–6.4 · Somewhat Poorly Drained drainage
Good candidate for raised beds to maximise drainage and extend the season.
Watering Needs
Drought stress: 5.5/10
Moderate drought pressure. Drip irrigation and mulching are highly recommended to maintain soil moisture through summer.
Season Tips
295-day frost-free season
Your long season supports multiple successions and heat-demanding crops like melons, sweet potatoes, and peppers. Plant warm-season crops as soon as soil warms.
Your Free Printable Garden Planner
Plan every bed, every planting, every harvest — in one place. This 24-page printable includes your zone's planting calendar, a month-by-month task list, a seed inventory tracker, a harvest log, and succession-planting charts. Built to print, write in, and actually use all season.
Recommended for Your Garden
Reduce heat stress and sun scorch in hot climates with UV-stabilized shade cloth.
Retain moisture and nutrients in sandy soils with expanded vermiculite.
Test your soil pH, nitrogen, phosphorus, and potassium levels before planting.
🥬 Vegetables to Grow in St. Mary Parish
115 vegetables that grow well in Zone 9b with planting dates for St. Mary Parish.
Show all 115 vegetables with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Acorn Squash | Jan 17 | Feb 14 | Feb 21 | May 16 – Jun 20 | 80–100 |
| Amaranth | Jan 3 | Feb 14 | Feb 21 | May 23 – Jul 11 | 90–120 |
| Artichoke | — | — | Feb 28 | Jul 4 – Sep 12 | 120–180 |
| Arugula | Jan 17 | Jan 24 | Feb 14 | Mar 21 – May 23 | 30–50 |
| Asparagus | — | — | Feb 28 | — | 730–1095 |
| Beets | — | Jan 24 | — | Mar 21 – Apr 18 | 50–70 |
| Belgian Endive | Jan 17 | Jan 24 | Feb 14 | Jun 6 – Aug 1 | 110–150 |
| Bitter Melon | Jan 3 | Feb 14 | Feb 21 | Apr 25 – Jun 6 | 60–90 |
| Black Beans | — | Feb 21 | — | May 23 – Jul 11 | 90–120 |
| Bok Choy | Jan 17 | Jan 24 | Feb 14 | Mar 28 – May 2 | 40–60 |
| Broccoli | Jan 17 | Jan 24 | Feb 14 | Apr 18 – May 30 | 60–90 |
| Broccoli Rabe | Jan 17 | Jan 24 | Feb 14 | Mar 28 – May 2 | 40–60 |
| Brussels Sprouts | Jan 17 | Jan 24 | Feb 14 | May 16 – Jul 11 | 90–130 |
| Butternut Squash | Jan 17 | Feb 14 | Feb 21 | May 23 – Jun 27 | 85–110 |
| Cabbage | Jan 17 | Jan 24 | Feb 14 | Apr 18 – Jun 13 | 60–100 |
| Calabash | Jan 3 | Feb 14 | Feb 21 | May 16 – Jul 11 | 80–120 |
| Cardoon | — | — | Feb 28 | Jul 4 – Aug 15 | 120–150 |
| Carrots | — | Jan 24 | — | Mar 28 – May 2 | 60–80 |
| Cauliflower | Jan 17 | Jan 24 | Feb 14 | Apr 11 – Jun 13 | 55–100 |
| Celeriac | Jan 17 | Jan 24 | Feb 14 | May 30 – Jul 4 | 100–120 |
| Celery | Jan 17 | Jan 24 | Feb 14 | May 9 – Jul 4 | 80–120 |
| Celtuce | Jan 17 | Jan 24 | Feb 14 | Apr 18 – May 30 | 60–90 |
| Chard | Jan 17 | Jan 24 | Feb 14 | Apr 11 – May 30 | 50–60 |
| Chayote | Jan 3 | Feb 14 | Feb 21 | Jun 27 – Sep 5 | 120–180 |
| Chickpeas | Jan 17 | Jan 24 | Feb 14 | May 9 – Jun 20 | 80–110 |
| Chicory | Jan 17 | Jan 24 | Feb 14 | Apr 18 – May 30 | 60–85 |
| Chinese Cabbage | Jan 17 | Jan 24 | Feb 14 | Apr 11 – May 9 | 50–70 |
| Christmas Lima Beans | Jan 3 | Feb 14 | Feb 21 | May 16 – Jun 20 | 80–100 |
| Collard Greens | Jan 17 | Jan 24 | Feb 14 | Apr 11 – Jun 13 | 55–75 |
| Corn | — | Feb 21 | — | Apr 25 – Jun 20 | 60–100 |
| Cowpeas | — | Feb 21 | — | Apr 25 – Jun 6 | 60–90 |
| Cress | Jan 17 | Jan 24 | Feb 14 | Feb 28 – Mar 21 | 14–21 |
| Crookneck Squash | Jan 17 | Feb 14 | Feb 21 | Apr 11 – May 9 | 45–60 |
| Crosne | — | Jan 24 | — | Jun 27 – Aug 29 | 150–200 |
| Cucumber | Jan 17 | Feb 14 | Feb 21 | Apr 18 – Jun 13 | 50–70 |
| Daikon | — | Jan 24 | — | Mar 21 – Apr 18 | 50–70 |
| Delicata Squash | Jan 17 | Feb 14 | Feb 21 | May 16 – Jun 20 | 80–100 |
| Edamame | — | Feb 21 | — | May 9 – Jun 20 | 75–100 |
| Eggplant | Jan 3 | Feb 14 | Feb 21 | May 2 – Jul 4 | 65–85 |
| Endive | Jan 17 | Jan 24 | Feb 14 | Apr 4 – May 9 | 45–65 |
| Escarole | Jan 17 | Jan 24 | Feb 14 | Apr 11 – May 9 | 50–70 |
| Fava Beans | Jan 17 | Jan 24 | Feb 14 | May 2 – Jun 13 | 75–100 |
| Fennel | Jan 3 | Feb 14 | Feb 21 | Apr 25 – Jun 6 | 60–90 |
| Garlic | — | — | — | — | 90–240 |
| Ginger | Jan 3 | Feb 14 | Feb 21 | Oct 24 – Dec 19 | 240–300 |
| Green Beans | — | Feb 21 | — | Apr 18 – Jun 13 | 50–65 |
| Horseradish | — | — | Feb 28 | Jul 4 – Sep 12 | 120–180 |
| Hot Peppers | Jan 3 | Feb 14 | Feb 21 | May 2 – Aug 8 | 70–120 |
| Hubbard Squash | Jan 17 | Feb 14 | Feb 21 | Jun 6 – Jul 11 | 100–120 |
| Jicama | Jan 3 | Feb 14 | Feb 21 | Jun 27 – Sep 5 | 120–180 |
| Kabocha | Jan 17 | Feb 14 | Feb 21 | May 23 – Jun 20 | 85–100 |
| Kai Lan | Jan 17 | Jan 24 | Feb 14 | Apr 4 – May 2 | 45–60 |
| Kale | Jan 17 | Jan 24 | Feb 14 | Apr 11 – Jun 6 | 50–70 |
| Kidney Beans | — | Feb 21 | — | May 23 – Jun 27 | 85–110 |
| Kohlrabi | Jan 17 | Jan 24 | Feb 14 | Apr 4 – May 9 | 45–65 |
| Komatsuna | Jan 17 | Jan 24 | Feb 14 | Mar 21 – Apr 25 | 35–50 |
| Leeks | Jan 17 | Jan 24 | Feb 14 | May 16 – Aug 1 | 90–150 |
| Lentils | Jan 17 | Jan 24 | Feb 14 | May 9 – Jun 20 | 80–110 |
| Lettuce | Jan 17 | Jan 24 | Feb 14 | Mar 21 – May 30 | 30–60 |
| Lima Beans | — | Feb 21 | — | Apr 25 – Jun 6 | 60–90 |
| Loofah | Jan 3 | Feb 14 | Feb 21 | Jun 6 – Aug 8 | 100–150 |
| Luffa | Jan 3 | Feb 14 | Feb 21 | May 23 – Aug 8 | 90–150 |
| Mache | Jan 17 | Jan 24 | Feb 14 | Mar 28 – May 2 | 40–60 |
| Malabar Spinach | Jan 3 | Feb 14 | Feb 21 | Apr 18 – May 16 | 55–70 |
| Melon | Jan 17 | Feb 14 | Feb 21 | May 2 – Jun 20 | 70–100 |
| Microgreens | Jan 17 | Jan 24 | Feb 14 | Feb 21 – Mar 21 | 7–21 |
| Mitsuba | Jan 17 | Jan 24 | Feb 7 | Apr 4 – May 30 | 50–70 |
| Mizuna | Jan 17 | Jan 24 | Feb 14 | Mar 21 – Apr 18 | 30–45 |
| Mustard Greens | Jan 17 | Jan 24 | Feb 14 | Mar 21 – May 23 | 30–50 |
| Napa Cabbage | Jan 17 | Jan 24 | Feb 14 | Apr 11 – May 16 | 55–75 |
| New Zealand Spinach | Jan 3 | Feb 14 | Feb 21 | Apr 18 – May 16 | 55–70 |
| Okra | Jan 3 | Feb 14 | Feb 21 | Apr 18 – Jun 13 | 50–65 |
| Onion | Jan 17 | Jan 24 | Feb 14 | May 16 – Jul 4 | 90–120 |
| Pac Choi | Jan 17 | Jan 24 | Feb 14 | Mar 28 – Apr 25 | 40–55 |
| Parsnip | — | Jan 24 | — | May 9 – Jun 20 | 100–130 |
| Patty Pan Squash | Jan 17 | Feb 14 | Feb 21 | Apr 11 – May 9 | 45–60 |
| Peas | Jan 17 | Jan 24 | Feb 14 | Apr 11 – Jun 6 | 55–70 |
| Peppers | Jan 3 | Feb 14 | Feb 21 | Apr 25 – Jul 4 | 60–90 |
| Pole Beans | Jan 3 | Feb 14 | Feb 21 | Apr 18 – Jun 13 | 55–70 |
| Potatoes | Jan 3 | Feb 14 | Feb 21 | May 2 – Jul 11 | 70–120 |
| Pumpkin | Jan 17 | Feb 14 | Feb 21 | May 23 – Jul 11 | 85–120 |
| Purslane | Jan 17 | Jan 24 | Feb 14 | Mar 28 – May 2 | 40–60 |
| Radicchio | Jan 17 | Jan 24 | Feb 14 | Apr 18 – May 23 | 60–80 |
| Radish | — | Jan 24 | — | Feb 21 – Mar 14 | 22–35 |
| Romanesco | Jan 17 | Jan 24 | Feb 14 | May 2 – Jun 13 | 75–100 |
| Rutabaga | — | Jan 24 | — | Apr 18 – May 23 | 80–100 |
| Salsify | — | Jan 24 | — | May 9 – Jun 20 | 100–130 |
| Savoy Cabbage | Jan 17 | Jan 24 | Feb 14 | Apr 25 – Jun 20 | 70–110 |
| Scallions | Jan 17 | Jan 24 | Feb 14 | Apr 11 – May 9 | 50–70 |
| Scarlet Runner Beans | Jan 3 | Feb 14 | Feb 21 | Apr 25 – May 30 | 60–80 |
| Shallot | Jan 17 | Jan 24 | Feb 14 | May 16 – Jul 4 | 90–120 |
| Shiso | Jan 3 | Feb 21 | Feb 21 | Apr 18 – Jun 13 | 50–70 |
| Snap Peas | Jan 3 | Feb 14 | Feb 21 | Apr 18 – Jun 13 | 55–70 |
| Snow Peas | Jan 17 | Jan 24 | Feb 14 | Apr 11 – Jun 6 | 50–65 |
| Soybeans | — | Feb 21 | — | May 16 – Jul 11 | 80–120 |
| Spaghetti Squash | Jan 17 | Feb 14 | Feb 21 | May 23 – Jun 20 | 85–100 |
| Spinach | Jan 17 | Jan 24 | Feb 14 | Mar 21 – May 23 | 35–50 |
| Squash (Summer) | Jan 17 | Feb 14 | Feb 21 | Apr 11 – Jun 13 | 45–65 |
| Squash (Winter) | Jan 17 | Feb 14 | Feb 21 | May 16 – Jul 11 | 80–120 |
| Sunchoke | — | — | Feb 28 | Jun 20 – Aug 15 | 110–150 |
| Sunflower | Jan 3 | Feb 14 | Feb 21 | May 2 – Jun 20 | 70–100 |
| Sweet Corn | — | Feb 21 | — | Apr 25 – Jun 6 | 60–90 |
| Sweet Potatoes | Jan 3 | Feb 14 | Feb 21 | May 23 – Jul 11 | 90–120 |
| Tatsoi | Jan 17 | Jan 24 | Feb 14 | Mar 21 – Apr 25 | 35–50 |
| Tomatillo | Jan 3 | Feb 14 | Feb 21 | Apr 25 – Jul 4 | 60–85 |
| Tomatoes | Jan 3 | Feb 14 | Feb 21 | Apr 25 – Jul 4 | 60–85 |
| Turmeric | Jan 3 | Feb 14 | Feb 21 | Oct 24 – Dec 19 | 240–300 |
| Turnip | — | Jan 24 | — | Mar 7 – Apr 11 | 40–60 |
| Watercress | Jan 17 | Jan 24 | Feb 14 | Mar 28 – May 2 | 40–60 |
| Watermelon | Jan 17 | Feb 14 | Feb 21 | May 2 – Jun 20 | 70–100 |
| Wax Beans | — | Feb 21 | — | Apr 18 – Jun 13 | 50–65 |
| Winter Melon | Jan 3 | Feb 14 | Feb 21 | May 23 – Jul 11 | 90–120 |
| Yam | Jan 3 | Feb 14 | Feb 21 | Aug 22 – Dec 19 | 180–330 |
| Yard Long Beans | Jan 3 | Feb 14 | Feb 21 | Apr 18 – May 30 | 55–80 |
| Zucchini | Jan 17 | Feb 14 | Feb 21 | Apr 11 – Jun 6 | 45–60 |
🍓 Fruits to Grow in St. Mary Parish
24 fruits that grow well in Zone 9b with planting dates for St. Mary Parish.
Show all 24 fruits with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Alpine Strawberries | — | — | Feb 28 | May 30 – Sep 12 | 90–180 |
| Blackberries | — | — | Feb 28 | — | 365–730 |
| Boysenberries | — | — | Feb 28 | — | 365–730 |
| Cantaloupe | — | — | Feb 28 | May 9 – Jun 13 | 70–90 |
| Che Fruit | — | — | Feb 28 | — | 1095–1825 |
| Dragon Fruit | — | — | Feb 28 | — | 365–730 |
| Elderberries | — | — | Feb 28 | — | 730–1095 |
| Figs | — | — | Feb 28 | — | 730–1825 |
| Goji Berries | — | — | Feb 28 | — | 730–1095 |
| Grapes | — | — | Feb 28 | — | 730–1095 |
| Ground Cherry | — | — | Feb 28 | May 9 – Jul 4 | 65–80 |
| Guava | — | — | Feb 28 | — | 365–730 |
| Honeydew | — | — | Feb 28 | May 23 – Jul 4 | 80–110 |
| Kiwi | — | — | Feb 28 | — | 1095–1825 |
| Loquat | — | — | Feb 28 | — | 730–1825 |
| Mulberries | — | — | Feb 28 | — | 730–1825 |
| Passion Fruit | — | — | Feb 28 | — | 365–545 |
| Pawpaw | — | — | Feb 28 | — | 1095–2555 |
| Persimmon | — | — | Feb 28 | — | 1095–2555 |
| Pomegranate | — | — | Feb 28 | — | 730–1095 |
| Quince | — | — | Feb 28 | — | 1095–1825 |
| Raspberries | — | — | Feb 28 | — | 365–730 |
| Serviceberries | — | — | Feb 28 | — | 730–1095 |
| Strawberries | — | — | Feb 28 | May 30 – Dec 26 | 90–365 |
🌿 Herbs to Grow in St. Mary Parish
40 herbs that grow well in Zone 9b with planting dates for St. Mary Parish.
Show all 40 herbs with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Anise | Jan 17 | Jan 24 | Feb 7 | May 9 – Jul 25 | 90–120 |
| Basil | Jan 3 | Feb 21 | Feb 21 | Apr 18 – Jun 20 | 50–75 |
| Bee Balm | — | — | Feb 21 | May 23 – Aug 8 | 90–120 |
| Borage | Jan 17 | Jan 24 | Feb 7 | Apr 4 – May 23 | 50–60 |
| Caraway | Jan 17 | Jan 24 | Feb 7 | — | 365–450 |
| Catnip | — | — | Feb 21 | Apr 25 – Jun 27 | 60–80 |
| Chamomile | Jan 17 | Jan 24 | Feb 7 | Apr 11 – Jun 20 | 60–90 |
| Chervil | Jan 17 | Jan 24 | Feb 7 | Mar 21 – May 23 | 40–60 |
| Chives | — | — | Feb 21 | Apr 25 – Jul 4 | 60–90 |
| Cilantro | Jan 17 | Jan 24 | Feb 7 | Mar 21 – May 23 | 40–60 |
| Comfrey | — | — | Feb 21 | Apr 25 – Jul 4 | 60–90 |
| Cumin | Jan 17 | Jan 24 | Feb 7 | May 23 – Jul 25 | 100–120 |
| Dill | Jan 17 | Jan 24 | Feb 7 | Mar 21 – May 23 | 40–60 |
| Echinacea | — | — | Feb 21 | Jun 27 – Oct 3 | 120–180 |
| Epazote | Jan 3 | Feb 21 | Feb 21 | Apr 11 – Jun 6 | 45–60 |
| Fennel (herb) | Jan 17 | Jan 24 | Feb 7 | Apr 11 – Jun 20 | 60–90 |
| Feverfew | — | — | Feb 21 | May 23 – Aug 8 | 90–120 |
| Garlic Chives | — | — | Feb 21 | Apr 25 – Jul 4 | 60–90 |
| Horehound | — | — | Feb 21 | May 9 – Jul 4 | 75–90 |
| Hyssop | — | — | Feb 21 | May 2 – Jul 4 | 70–90 |
| Lavender | — | — | Feb 21 | May 23 – Oct 24 | 90–200 |
| Lemon Balm | — | — | Feb 21 | Apr 25 – Jun 13 | 60–70 |
| Lemon Thyme | — | — | Feb 21 | May 2 – Jul 4 | 70–90 |
| Lemon Verbena | Jan 3 | Feb 21 | Feb 21 | Apr 25 – Jul 4 | 60–90 |
| Lemongrass | Jan 3 | Feb 21 | Feb 21 | May 9 – Aug 8 | 75–120 |
| Marjoram | — | — | Feb 21 | Apr 25 – Jul 4 | 60–90 |
| Mint | — | — | Feb 21 | Apr 25 – Jul 4 | 60–90 |
| Oregano | — | — | Feb 21 | Apr 25 – Jul 4 | 60–90 |
| Parsley | Jan 17 | Jan 24 | Feb 7 | Apr 11 – Jun 13 | 60–80 |
| Rosemary | — | — | Feb 21 | May 16 – Oct 3 | 80–180 |
| Rue | — | — | Feb 21 | May 2 – Jul 4 | 70–90 |
| Sage | — | — | Feb 21 | May 9 – Jul 4 | 75–90 |
| Savory | — | — | Feb 21 | Apr 18 – Jun 13 | 50–70 |
| Sorrel | Jan 17 | Jan 24 | Feb 7 | Mar 21 – May 23 | 40–60 |
| Stevia | Jan 3 | Feb 21 | Feb 21 | Apr 25 – Jul 4 | 60–90 |
| Tarragon | — | — | Feb 21 | Apr 25 – Jul 4 | 60–90 |
| Thai Basil | Jan 3 | Feb 21 | Feb 21 | Apr 18 – Jun 20 | 50–75 |
| Thyme | — | — | Feb 21 | May 2 – Jul 4 | 70–90 |
| Valerian | — | — | Feb 21 | Jun 27 – Oct 3 | 120–180 |
| Yarrow | — | — | Feb 21 | May 23 – Aug 8 | 90–120 |
Monthly Planting Guide for St. Mary Parish
Gardening Guides & Resources
Helpful guides from The Ultimate Homestead to improve your garden in St. Mary Parish.
Frequently Asked Questions
What planting zone is St. Mary Parish, LA?
St. Mary Parish is in USDA Hardiness Zone 9b. This zone classification determines which perennial plants survive winter and sets the baseline for frost timing across the county.
When is the last frost in St. Mary Parish, LA?
Based on 31 years of NOAA weather station data, the median last spring frost in St. Mary Parish falls around February 14. In 8 out of 10 years, last frost lands between January 20 and March 11 — a 51-day window of variability. Use March 11 as your conservative safe-to-plant date for frost-sensitive crops.
When is the first fall frost in St. Mary Parish, LA?
The median first fall frost in St. Mary Parish arrives around December 5. In cold years it can arrive as early as November 15; in mild years as late as December 20. Harvest or protect frost-sensitive crops — tomatoes, peppers, basil, squash — before this date.
How long is the growing season in St. Mary Parish?
St. Mary Parish has a frost-free growing season of approximately 295 days. This long season supports multiple succession plantings and warm-season crops that need extended heat, like sweet potatoes and melons. Climate records show the growing season is trending shorter by about 2.47 days per decade.
What is the soil like in St. Mary Parish for gardening?
St. Mary Parish has predominantly Sandy Loam soil with a pH range of 4.8–6.4 and Somewhat Poorly Drained drainage. Most vegetables and herbs grow well with standard composting and seasonal soil amendment.
What is grown commercially in St. Mary Parish?
St. Mary Parish has commercial agriculture that includes Sugarcane, Soybeans, Rice, Corn. These crops reflect the local climate and soil conditions — what succeeds commercially often translates well to home gardens in the same area.
Is St. Mary Parish a good location for home gardening?
St. Mary Parish scores 49/100 (Moderate) on our Microclimate Index, which combines frost reliability, drought pressure, soil challenge, elevation risk, and long-term climate trend. Gardening here benefits from close attention to frost timing and season extension due to the challenging microclimate factors.
Your St. Mary Parish Garden Planner — Free
A 24-page printable planner built for St. Mary 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.
The Gardener's Encyclopedia to Companion Planting
The pairings that make vegetables, herbs, and flowers grow better — and the ones that quietly wreck a bed.
- Proven pairings for 200+ vegetables, herbs, flowers, and fruits
- Full seed-starting + planting schedule with timing and spacing
- Bonus: square-foot gardening guide + printable seasonal planners
Seed Saving & Storage Guide
Most saved seeds go bad before next season. This shows exactly when to pick, how to dry, and where to store seeds from 200 plants so yours don't.
- 200 plants, step-by-step: life cycle, pollination type, isolation
- Exact temperature + humidity ranges that keep seeds viable
- Bonus: searchable Google Sheets tracker + custom GPT assistant
Composting Guide for Homesteaders
Turn kitchen scraps and yard waste into compost that actually feeds the garden — instead of a pile that smells, attracts pests, and never breaks down.
- 14 sections on composting methods, soil science, and troubleshooting
- The 7-step hot-compost system from start to finish
- Bonus tools: troubleshooting chart, safety guide, monitoring log