Monroe County, FL — Planting Guide
Monroe County is in USDA Zone 11b. The average last spring frost is January 22 and the first fall frost is April 15, giving you a growing season of approximately 278 days.
At an elevation of 169 ft, Monroe County receives approximately 55.6 in of rainfall annually. Summer highs average 93°F with winter lows around 72°F. The predominant soil type is Sand.
Based on 11 years of NOAA climate station data, the last frost date here varies by 67 days year to year — ranging from January 8 in warm years to March 16 in cold years. The growing season is trending longer by about 32.95 days per decade. Monroe County scores 49/100 (Moderate) on the Microclimate Index.
🌡️ Zone
11b (45°F to 50°F min)
❄️ Last Frost
January 22
🍂 First Frost
April 15
📅 Growing Season
278 days
⛰️ Elevation
169 ft
🌧️ Annual Rainfall
55.6 in
Monthly Watering Calendar for Monroe County
When you'll need to water your garden — based on average monthly rainfall vs. the ~1 inch/week most gardens need.
Quick context: Most vegetables want about 1 inch of water per week. Monroe County gets 56" a year — months that hit that 1"/week need zero supplemental watering; months that fall short, the table tells you how much to add. Saves you from drowning roots and from drought-stressing plants into bolting.
View detailed monthly data
| Month | Avg Rainfall | Rainy Days | Extra Water Needed | Watering Effort |
|---|---|---|---|---|
| Jan | 2.3 in | 5 days | 2 in | High |
| Feb | 2.7 in | 6 days | 1.6 in | High |
| Mar | 3.8 in | 7 days | 0.5 in | Low |
| Apr | 2.5 in | 6 days | 1.8 in | High |
| May | 3.2 in | 10 days | 1.1 in | Moderate |
| Jun | 7.1 in | 16 days | — | Low |
| Jul | 8.2 in | 16 days | — | Low |
| Aug | 8.7 in | 18 days | — | Low |
| Sep | 7.7 in | 13 days | — | Low |
| Oct | 4.8 in | 9 days | — | Low |
| Nov | 2.2 in | 6 days | 2.1 in | High |
| Dec | 2.5 in | 5 days | 1.8 in | High |
Annual total: 55.7 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.
Monroe County Soil Profile
Soil Type
Sand
Soil pH
4.8-5.7
Drainage
Well Drained
Frost Risk Probability
Based on 11 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 16 | — | — |
| Cautious | Feb 15 | — | — |
| Average year | Jan 22 | — | — |
| Optimistic | Jan 17 | — | — |
| Aggressive (risky) | Jan 8 | — | — |
Not very — frost dates can vary by ±67 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 longer here (about 33 days per decade). Spring is arriving earlier than it used to. Good news for gardeners.
Gardening Difficulty Score
Monroe County presents some gardening challenges. Choose adapted varieties and plan around frost dates.
No frost countdown needed. Frost is exceptional in this area — most years record zero frost days. Plan around heat and rainfall instead.
Local Gardening Help in Monroe County
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 Monroe County's climate and soil.
County Extension Office
Monroe County University of Florida IFAS Extension Extension Office
Phone: 352-392-1761
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 Monroe County
Finding local nurseries & garden centers in Monroe County
Why Buy Local
Local nurseries carry plants that are proven to grow in your area. Staff can give you advice specific to Monroe County'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 Monroe County FL" or "garden center Monroe County" 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 Monroe County FL" or check your extension office and local parks department. Facebook groups like "Monroe County Gardeners" or "Florida Gardening" are also excellent for local advice and plant swaps.
What to Plant Next in Monroe County
In a year-round growing climate, succession planning isn't about beating frost — it's about matching the next crop to the next season's heat.
Cool-season crops typically finish March–April as temperatures climb. Don't replant lettuce or brassicas now — they'll bolt within weeks. Switch to heat-lovers.
Spring tomato vines fade as summer humidity rises. Pull them by June and plant heat-survivors that thrive in the conditions tomatoes hate.
As humidity drops in September–October, the second growing season opens. Plant transplants of tomatoes, peppers, eggplant — they'll set fruit through fall and into winter.
Winter is your "spring" — direct-sow every 2 weeks for continuous lettuce, spinach, and radish harvests. Plant strawberries, garlic, and onions. Brassicas planted now finish in January–March.
Sunlight & Day Length in Monroe County
Monthly daylight hours and peak sun — critical for onion varieties, photoperiod-sensitive plants, and solar garden planning.
For new gardeners: You can't change the sun. Picking the right day-length-matched varieties for Monroe County matters more than any other "fix" you make — and the seed packet tells you (look for "long-day," "short-day," "day-neutral").
Longest Day
13.5 hours
Summer solstice daylight
Shortest Day
10.5 hours
Winter solstice daylight
Peak Sun Hours
9.3 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 | 10.6 hr | 5.9 hr | Short day |
| February | 11.2 hr | 6.6 hr | Short day |
| March | 11.8 hr | 7.4 hr | Short day |
| April | 12.6 hr | 8.4 hr | Neutral |
| May | 13.2 hr | 9.3 hr | Neutral |
| June | 13.5 hr | 7.6 hr | Neutral |
| July | 13.4 hr | 6.8 hr | Neutral |
| August | 12.9 hr | 6.9 hr | Neutral |
| September | 12.1 hr | 6 hr | Neutral |
| October | 11.4 hr | 7.1 hr | Short day |
| November | 10.8 hr | 6.2 hr | Short day |
| December | 10.5 hr | 5.8 hr | Short day |
Peak sun hours factor in typical cloud cover — use these for solar panel and shade-planning calculations.
Soil Temperature & Composting in Monroe County
Monthly soil temps tell you when to plant warm-season crops, and when your compost pile is actively working.
Why this matters: Lettuce germinates at 35°F. Beans want 60°F. Tomatoes 65°F+. Soil temp, not air temp, is what plants feel. Monroe County's monthly curve tells you when each crop actually has the conditions to take off.
Plant Warm Crops When
Soil reaches 60°F+
Soil warm enough from Jan through Dec.
Best Month to Compost
Mar
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 | 63°F | 68°F | ♻️ Active | ~14 weeks |
| Feb | 64°F | 68°F | ♻️ Active | ~14 weeks |
| Mar | 71°F | 72°F | 🔥 Peak | ~8 weeks |
| Apr | 75°F | 77°F | 🔥 Peak | ~8 weeks |
| May | 81°F | 83°F | 🔥 Peak | ~8 weeks |
| Jun | 88°F | 87°F | 🔥 Peak | ~8 weeks |
| Jul | 94°F | 91°F | 🔥 Peak | ~8 weeks |
| Aug | 96°F | 94°F | 🔥 Peak | ~8 weeks |
| Sep | 94°F | 91°F | 🔥 Peak | ~8 weeks |
| Oct | 86°F | 87°F | 🔥 Peak | ~8 weeks |
| Nov | 75°F | 81°F | 🔥 Peak | ~8 weeks |
| Dec | 69°F | 72°F | 🔥 Peak | ~8 weeks |
Highlighted rows = soil 60°F+ (safe for warm-season transplants). Compost finishes fastest during peak activity months.
Pest & Disease Pressure in Monroe County
Computed from local climate patterns — warmer, humid conditions increase pest generations and fungal disease risk.
Quick context: Pest pressure is a function of climate, not effort. Monroe County's baseline tells you how much vigilance is normal. A bad pest year in low-pressure region = a normal year in high-pressure region.
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 | Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec |
| Whiteflies | High | Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec |
| Spider mites | High | Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov |
| Thrips | High | Mar, Apr, May, Jun, Jul, Aug, Sep |
| Scale insects | Moderate | Apr, May, Jun, Jul, Aug, Sep, Oct |
| Nematodes | Moderate | May, Jun, Jul, Aug, Sep |
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 Monroe County
Cover crops protect bare soil, fix nitrogen, suppress weeds, and improve soil structure — with planting dates calibrated for your area.
For new gardeners: Cover crops do four things at once: fix nitrogen (legumes), suppress weeds (any), prevent erosion, and add organic matter when chopped down. Monroe County's seasonal pattern determines which species fit which gap.
Spring Cover Crops (1 options) — Build soil before the main growing season
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Cowpeas (southern peas) | Jan 1 | Nov 5 | ✓ Yes | Excellent nitrogen fixer for warm climates, edible |
Wind & Microclimate in Monroe County
Why this matters: Wind shapes the garden you don't think about: bee paths, evaporation, structural stress on tomato cages. Monroe County's 8.0 mph background level is a baseline you should know before placing the tallest crops (sunflowers, pole beans, sweet corn).
Wind dries soil, stresses plants, and affects frost patterns. Understanding your exposure helps with garden placement.
Seasonal Wind Speed
Spring: 11 mph Summer: 8 mph
Fall: 9 mph Winter: 11 mph
Prevailing wind: E. Moderate wind — consider a temporary windbreak for young seedlings.
Windbreak Benefit
5.3/10
Moderately beneficial — a simple fence or trellis can protect delicate crops from wind stress.
Frost Pocket Risk
Low
Relatively flat terrain (50 ft range). Frost pocket risk is minimal — garden placement is flexible.
Rainwater Harvesting in Monroe County
How much water you can collect, when to collect it, and what size system you need for your garden.
What this means for you: Rainwater scales linearly with roof area. A 2,000 sq ft roof in Monroe County captures ~1,200 gallons per 1" of rain — given 56" annual rainfall, that's thousands of gallons a year if you have storage to hold it.
Annual Collection
27,760 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 1,250 gal tank.
Legal Status
Unrestricted
Rainwater harvesting is fully legal in your state with no restrictions.
Best Collection Months
Jun, Jul, Aug, Sep
Highest rainfall months — your barrels will fill up quickly during these months.
Months to Draw From Storage
Jan, Nov, Dec
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 55.7 inches of rain per year
- A 1,000 sq ft roof can collect roughly 27,760 gallons annually
- Rainwater harvesting is fully legal in your state
- Your area gets ample rainfall — even small barrels make a big difference
- Consider a rain garden to handle overflow during heavy rainfall months
Soil & Growing Conditions in Monroe County
Soil Type
Sand
Soil pH 4.8–5.7 · Excessively Drained drainage
Raised beds strongly recommended here — native soil drainage or texture limits in-ground options.
Watering Needs
Drought stress: 3.5/10
Low-to-moderate drought stress. Plan to water 1–2 times per week during peak summer. (55.6 in. annual rainfall)
Season Tips
278-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 22-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.
Monthly Planting Guide for Monroe County
Gardening Guides & Resources
Helpful guides from The Ultimate Homestead to improve your garden in Monroe County.
Frequently Asked Questions
What planting zone is Monroe County, FL?
Monroe County is in USDA Hardiness Zone 11b. 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 Monroe County, FL?
Based on 11 years of NOAA weather station data, the median last spring frost in Monroe County falls around January 22. In 8 out of 10 years, last frost lands between January 8 and March 16 — a 67-day window of variability. Use March 16 as your conservative safe-to-plant date for frost-sensitive crops.
How long is the growing season in Monroe County?
Monroe County has a frost-free growing season of approximately 278 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 longer by about 32.95 days per decade.
What is the soil like in Monroe County for gardening?
Monroe County has predominantly Sand soil with a pH range of 4.8–5.7 and Excessively Drained drainage. The native soil conditions make raised beds a particularly good investment here — they let you control drainage and fertility independent of the ground soil.
What is grown commercially in Monroe County?
Monroe County has commercial agriculture that includes Citrus, Sugarcane, Tomatoes. These crops reflect the local climate and soil conditions — what succeeds commercially often translates well to home gardens in the same area.
Is Monroe County a good location for home gardening?
Monroe County 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 Monroe County Garden Planner — Free
A 22-page printable planner built for Monroe County (Zone 11b). 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