Macon County, TN — Planting Guide
Macon County is in USDA Zone 7b. The average last spring frost is April 10 and the first fall frost is October 28, giving you a growing season of approximately 201 days.
At an elevation of 2,524 ft, Macon County receives approximately 47.1 in of rainfall annually. Summer highs average 87°F with winter lows around 26°F. The predominant soil type is Silt Loam.
Based on 31 years of NOAA climate station data, the last frost date here varies by 24 days year to year — ranging from March 28 in warm years to April 21 in cold years. The growing season is trending shorter by about 2.42 days per decade. Macon County scores 54/100 (Moderate) on the Microclimate Index.
🌡️ Zone
7b (5°F to 10°F min)
❄️ Last Frost
April 10
🍂 First Frost
October 28
📅 Growing Season
201 days
⛰️ Elevation
2,524 ft
🌧️ Annual Rainfall
47.1 in
Monthly Watering Calendar for Macon County
When you'll need to water your garden — based on average monthly rainfall vs. the ~1 inch/week most gardens need.
Why it matters: A drip irrigation system pays for itself in 1-2 seasons in any climate. Macon County's 47" annual rainfall determines whether you'll run it weekly (dry zones) or maybe just during summer dry spells (wet zones).
View detailed monthly data
| Month | Avg Rainfall | Rainy Days | Extra Water Needed | Watering Effort |
|---|---|---|---|---|
| Jan | 4.3 in | 9 days | — | None |
| Feb | 3.4 in | 8 days | — | None |
| Mar | 4.2 in | 9 days | 0.1 in | Low |
| Apr | 3.6 in | 6 days | 0.7 in | Moderate |
| May | 3.8 in | 8 days | 0.5 in | Low |
| Jun | 4 in | 11 days | 0.3 in | Low |
| Jul | 5.3 in | 13 days | — | Low |
| Aug | 4.6 in | 12 days | — | Low |
| Sep | 3.6 in | 7 days | 0.7 in | Moderate |
| Oct | 2.9 in | 6 days | 1.4 in | Moderate |
| Nov | 3.8 in | 7 days | — | None |
| Dec | 3.6 in | 8 days | — | None |
Annual total: 47.1 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.
Macon County Soil Profile
Soil Type
Silt Loam
Soil pH
5.7-6.7
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) | Apr 21 | Nov 10 | 203 days |
| Cautious | Apr 16 | Nov 1 | 199 days |
| Average year | Apr 10 | Oct 28 | 201 days |
| Optimistic | Apr 6 | Oct 22 | 199 days |
| Aggressive (risky) | Mar 28 | Oct 12 | 198 days |
Not very — frost dates can vary by ±24 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 2.4 days per decade). Use the "Conservative" dates and choose fast-maturing varieties.
Gardening Difficulty Score
Macon County presents some gardening challenges. Choose adapted varieties and plan around frost dates.
Local Gardening Help in Macon 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 Macon County's climate and soil.
County Extension Office
Macon County University of Tennessee Extension Extension Office
Phone: 865-974-7114
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 Macon County
Finding local nurseries & garden centers in Macon County
Why Buy Local
Local nurseries carry plants that are proven to grow in your area. Staff can give you advice specific to Macon 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 Macon County TN" or "garden center Macon 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 Macon County TN" or check your extension office and local parks department. Facebook groups like "Macon County Gardeners" or "Tennessee 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 in Macon County
Monthly daylight hours and peak sun — critical for onion varieties, photoperiod-sensitive plants, and solar garden planning.
What this means for you: Onions are a great example of why day length matters. They "bulb up" only when daylight hits a specific number of hours — plant the wrong variety (short-day in the north, long-day in the south) and you'll get tiny bulbs no matter how well you grow them. Macon County's latitude determines which onion varieties succeed.
Longest Day
14.5 hours
Summer solstice daylight
Shortest Day
9.5 hours
Winter solstice daylight
Peak Sun Hours
8.5 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: Day-neutral onion varieties like Candy, Cabernet, and Sierra Blanca perform best in your day-length range.
View detailed monthly data
| Month | Daylight Hours | Peak Sun Hours | Day Length |
|---|---|---|---|
| January | 9.8 hr | 5.1 hr | Short day |
| February | 10.7 hr | 5.5 hr | Short day |
| March | 11.7 hr | 6.3 hr | Short day |
| April | 12.9 hr | 7.5 hr | Neutral |
| May | 13.9 hr | 8.5 hr | Neutral |
| June | 14.5 hr | 8.2 hr | Long day |
| July | 14.3 hr | 8 hr | Long day |
| August | 13.4 hr | 7 hr | Neutral |
| September | 12.2 hr | 7.2 hr | Neutral |
| October | 11 hr | 6.6 hr | Short day |
| November | 10 hr | 5.4 hr | Short day |
| December | 9.5 hr | 4.6 hr | Short day |
Peak sun hours factor in typical cloud cover — use these for solar panel and shade-planning calculations.
Soil Temperature & Composting in Macon County
Monthly soil temps tell you when to plant warm-season crops, and when your compost pile is actively working.
Why it matters: Most root crops germinate well at 50-60°F. Most fruit-bearing crops want 65-75°F. Macon County's monthly soil curve maps these windows to actual months.
Plant Warm Crops When
Soil reaches 60°F+
Soil warm enough from Jun through Sep.
Best Month to Compost
Jun
Microbial activity peaks when soil is warm.
Active Composting
6 months
Solid season. Piles go dormant in winter.
View detailed monthly data
| Month | Soil 4" Deep | Soil 8" Deep | Compost Activity | Time to Finish |
|---|---|---|---|---|
| Jan | 28°F | 33°F | ❄️ Dormant | ~36 weeks |
| Feb | 26°F | 32°F | ❄️ Dormant | ~36 weeks |
| Mar | 34°F | 37°F | ❄️ Dormant | ~36 weeks |
| Apr | 47°F | 44°F | 🐢 Slow | ~24 weeks |
| May | 59°F | 54°F | ♻️ Active | ~14 weeks |
| Jun | 68°F | 64°F | 🔥 Peak | ~8 weeks |
| Jul | 78°F | 72°F | 🔥 Peak | ~8 weeks |
| Aug | 78°F | 74°F | 🔥 Peak | ~8 weeks |
| Sep | 71°F | 69°F | 🔥 Peak | ~8 weeks |
| Oct | 58°F | 60°F | ♻️ Active | ~14 weeks |
| Nov | 46°F | 50°F | 🐢 Slow | ~24 weeks |
| Dec | 32°F | 40°F | ❄️ Dormant | ~36 weeks |
Highlighted rows = soil 60°F+ (safe for warm-season transplants). Compost finishes fastest during peak activity months.
Pest & Disease Pressure in Macon County
Computed from local climate patterns — warmer, humid conditions increase pest generations and fungal disease risk.
Why this matters: Pest and disease pressure is the X-factor most beginners under-plan for. Macon County's climate determines whether you can mostly "plant and see" or whether you need a pest-management routine from the first seedling.
Insect Pest Pressure
Moderate — common pests appear but manageable with monitoring.
Disease Risk
Moderate — watch for mildew and blight during wet periods.
Seasonal Risk
View 6 common pests in your area
| Pest | Risk Level | Peak Months |
|---|---|---|
| Aphids | Moderate | Apr, May, Jun, Jul, Aug, Sep |
| Japanese beetles | Moderate | Jun, Jul, Aug |
| Squash vine borers | Moderate | Jun, Jul |
| Tomato hornworms | Moderate | Jun, Jul, Aug |
| Cucumber beetles | Moderate | May, Jun, Jul |
| Stink bugs | Low | Jun, Jul, Aug, Sep |
Organic pest management tips
- Use row covers on susceptible crops during peak pest months
- Apply neem oil preventatively every 7-14 days during active pest season
- Interplant with strong-scented herbs (basil, marigold) to confuse pests
- Hand-pick larger pests (beetles, caterpillars) in early morning when they're sluggish
- Practice crop rotation — never plant the same family in the same spot within 3 years
Cover Crops for Macon County
Cover crops protect bare soil, fix nitrogen, suppress weeds, and improve soil structure — with planting dates calibrated for your area.
What this means for you: Cover crops do four things at once: fix nitrogen (legumes), suppress weeds (any), prevent erosion, and add organic matter when chopped down. Macon County's seasonal pattern determines which species fit which gap.
Spring Cover Crops (3 options) — Build soil before the main growing season
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Buckwheat | Apr 19 | Aug 19 | — | Rapid growth, attracts pollinators, suppresses weeds |
| Sorghum-sudan grass | Apr 14 | Aug 26 | — | Massive biomass, breaks compaction, suppresses nematodes |
| White clover | Mar 15 | Aug 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 | May 4 | Oct 7 | — | Deep roots break compaction, attract pollinators and beneficial insects |
Fall Cover Crops (7 options) — Plant after harvest to protect soil over winter
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Austrian winter peas | Aug 16 | Mar 27 | ✓ Yes | Fixes nitrogen, good for heavy clay soils |
| Crimson clover | Aug 22 | Mar 20 | ✓ Yes | Fixes nitrogen, attracts pollinators in spring |
| Daikon radish | Sep 8 | Mar 27 | — | Deep taproot breaks compaction, excellent for clay soils |
| Hairy vetch | Aug 13 | Mar 20 | ✓ Yes | Excellent nitrogen fixer, good for depleted soils |
| Oats | Sep 18 | Mar 27 | — | Quick biomass, winterkills in cold zones — no spring tillage needed |
| Winter rye | Aug 1 | Mar 27 | — | Suppresses weeds, prevents erosion, breaks up compacted soil |
| Winter wheat | Jul 20 | Mar 27 | — | Erosion control, weed suppression, good biomass |
Wind & Microclimate in Macon County
What this means for you: Plants lose water through tiny leaf pores. Wind accelerates that loss dramatically — a 15 mph day can double a calm day's irrigation need. Macon County's 6.6 mph background wind is something to design around, not against. Windbreaks made of perennial shrubs save more water than any drip system.
Wind dries soil, stresses plants, and affects frost patterns. Understanding your exposure helps with garden placement.
Seasonal Wind Speed
Spring: 10 mph Summer: 7 mph
Fall: 7 mph Winter: 8 mph
Prevailing wind: SW. Moderate wind — consider a temporary windbreak for young seedlings.
Windbreak Benefit
2.9/10
Low need — wind is not a major factor in your garden planning.
Frost Pocket Risk
Low
Relatively flat terrain (255 ft range). Frost pocket risk is minimal — garden placement is flexible.
Rainwater Harvesting in Macon County
How much water you can collect, when to collect it, and what size system you need for your garden.
For new gardeners: Most gardens use 0.5-1 gallon per square foot per week in summer. Macon County's 47" annual rainfall is enough to cover most needs if you can capture it. Rain barrels under downspouts are the simplest entry point.
Annual Collection
23,474 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
Jan, Mar, Jul, Aug
Highest rainfall months — your barrels will fill up quickly during these months.
Months to Draw From Storage
Feb, Oct, 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 47.1 inches of rain per year
- A 1,000 sq ft roof can collect roughly 23,474 gallons annually
- Rainwater harvesting is fully legal in your state
- Stock up on stored water before your dry season (Feb, Oct, Dec)
- Use a first-flush diverter to keep roof debris out of your collection
Soil & Growing Conditions in Macon County
Soil Type
Silt Loam
Soil pH 5.7–6.7 · Moderately Well Drained drainage
Good candidate for raised beds to maximise drainage and extend the season.
Watering Needs
Drought stress: 3.5/10
Low-to-moderate drought stress. Plan to water 1–2 times per week during peak summer. (47.1 in. annual rainfall)
Season Tips
201-day frost-free season
Plenty of time for warm-season crops. Start heat-lovers indoors 6–8 weeks before last frost to maximise your harvest window.
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
Test your soil pH, nitrogen, phosphorus, and potassium levels before planting.
Get instant, accurate soil pH readings to fine-tune your amendments.
Boost soil fertility and structure with rich, well-aged organic compost.
Monthly Planting Guide for Macon County
Gardening Guides & Resources
Helpful guides from The Ultimate Homestead to improve your garden in Macon County.
Frequently Asked Questions
What planting zone is Macon County, TN?
Macon County is in USDA Hardiness Zone 7b. 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 Macon County, TN?
Based on 31 years of NOAA weather station data, the median last spring frost in Macon County falls around April 10. In 8 out of 10 years, last frost lands between March 28 and April 21 — a 24-day window of variability. Use April 21 as your conservative safe-to-plant date for frost-sensitive crops.
When is the first fall frost in Macon County, TN?
The median first fall frost in Macon County arrives around October 28. In cold years it can arrive as early as October 12; in mild years as late as November 10. Harvest or protect frost-sensitive crops — tomatoes, peppers, basil, squash — before this date.
How long is the growing season in Macon County?
Macon County has a frost-free growing season of approximately 201 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 2.42 days per decade.
What is the soil like in Macon County for gardening?
Macon County has predominantly Silt Loam soil with a pH range of 5.7–6.7 and Moderately Well Drained drainage. Most vegetables and herbs grow well with standard composting and seasonal soil amendment.
What is grown commercially in Macon County?
Macon County has commercial agriculture that includes Corn, Soybeans, Cattle, Hay, Wheat. These crops reflect the local climate and soil conditions — what succeeds commercially often translates well to home gardens in the same area.
Is Macon County a good location for home gardening?
Macon County scores 54/100 (Moderate) on our Microclimate Index, which combines frost reliability, drought pressure, soil challenge, elevation risk, and long-term climate trend. Conditions here are moderate — most common crops grow well with standard timing and care.
Your Macon County Garden Planner — Free
A 22-page printable planner built for Macon County (Zone 7b). 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