Cobb County, GA — Planting Guide
Cobb County is in USDA Zone 7b. The average last spring frost is March 31 and the first fall frost is November 1, giving you a growing season of approximately 215 days.
At an elevation of 387 ft, Cobb County receives approximately 57.2 in of rainfall annually. Summer highs average 89°F with winter lows around 30°F. The predominant soil type is Clay Loam.
Based on 30 years of NOAA climate station data, the last frost date here varies by 32 days year to year — ranging from March 15 in warm years to April 17 in cold years. The growing season is trending longer by about 3.3 days per decade. Cobb County scores 43/100 (Moderate) on the Microclimate Index.
🌡️ Zone
7b (5°F to 10°F min)
❄️ Last Frost
March 31
🍂 First Frost
November 1
📅 Growing Season
215 days
⛰️ Elevation
387 ft
🌧️ Annual Rainfall
57.2 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 | 4.2 in | 9 days | — | None |
| Feb | 4 in | 8 days | — | None |
| Mar | 6 in | 10 days | — | Low |
| Apr | 4.7 in | 8 days | — | Low |
| May | 3.9 in | 8 days | 0.4 in | Low |
| Jun | 5.8 in | 11 days | — | Low |
| Jul | 5.5 in | 11 days | — | Low |
| Aug | 5.2 in | 12 days | — | Low |
| Sep | 4.7 in | 7 days | — | Low |
| Oct | 3.7 in | 8 days | 0.6 in | Moderate |
| Nov | 4.3 in | 8 days | — | None |
| Dec | 5.2 in | 8 days | — | None |
Annual total: 57.2 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.
Cobb County Soil Profile
Soil Type
Clay Loam
Soil pH
5.3-6.5
Drainage
Well Drained
Frost Risk Probability
Based on 30 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 17 | Nov 23 | 220 days |
| Cautious | Apr 10 | Nov 6 | 210 days |
| Average year | Mar 31 | Nov 1 | 215 days |
| Optimistic | Mar 23 | Oct 26 | 217 days |
| Aggressive (risky) | Mar 15 | Oct 18 | 217 days |
Not very — frost dates can vary by ±32 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 3.3 days per decade). Spring is arriving earlier than it used to. Good news for gardeners.
Gardening Difficulty Score
Cobb County presents some gardening challenges. Choose adapted varieties and plan around frost dates.
Local Gardening Help in Cobb 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 Cobb County's climate and soil.
County Extension Office
Cobb County University of Georgia Cooperative Extension Extension Office
Phone: 706-542-3824
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 Cobb County
Finding local nurseries & garden centers in Cobb County
Why Buy Local
Local nurseries carry plants that are proven to grow in your area. Staff can give you advice specific to Cobb 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 Cobb County GA" or "garden center Cobb 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 Cobb County GA" or check your extension office and local parks department. Facebook groups like "Cobb County Gardeners" or "Georgia 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
14.2 hours
Summer solstice daylight
Shortest Day
9.8 hours
Winter solstice daylight
Peak Sun Hours
8.8 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 | 10 hr | 4.8 hr | Short day |
| February | 10.8 hr | 5.6 hr | Short day |
| March | 11.7 hr | 6.1 hr | Short day |
| April | 12.9 hr | 7.6 hr | Neutral |
| May | 13.8 hr | 8.8 hr | Neutral |
| June | 14.2 hr | 8.3 hr | Long day |
| July | 14.1 hr | 8 hr | Long day |
| August | 13.3 hr | 7.4 hr | Neutral |
| September | 12.2 hr | 6.7 hr | Neutral |
| October | 11.1 hr | 6.7 hr | Short day |
| November | 10.2 hr | 5.9 hr | Short day |
| December | 9.8 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 May through Oct.
Best Month to Compost
May
Microbial activity peaks when soil is warm.
Active Composting
8 months
Nearly year-round composting.
View detailed monthly data
| Month | Soil 4" Deep | Soil 8" Deep | Compost Activity | Time to Finish |
|---|---|---|---|---|
| Jan | 37°F | 46°F | ❄️ Dormant | ~36 weeks |
| Feb | 38°F | 44°F | ❄️ Dormant | ~36 weeks |
| Mar | 48°F | 49°F | 🐢 Slow | ~24 weeks |
| Apr | 59°F | 57°F | ♻️ Active | ~14 weeks |
| May | 67°F | 65°F | 🔥 Peak | ~8 weeks |
| Jun | 80°F | 75°F | 🔥 Peak | ~8 weeks |
| Jul | 85°F | 80°F | 🔥 Peak | ~8 weeks |
| Aug | 87°F | 84°F | 🔥 Peak | ~8 weeks |
| Sep | 82°F | 80°F | 🔥 Peak | ~8 weeks |
| Oct | 70°F | 73°F | 🔥 Peak | ~8 weeks |
| Nov | 56°F | 62°F | ♻️ Active | ~14 weeks |
| Dec | 46°F | 52°F | 🐢 Slow | ~24 weeks |
Highlighted rows = soil 60°F+ (safe for warm-season transplants). Compost finishes fastest during peak activity months.
Pest & Disease Pressure in Cobb County
Computed from local climate patterns — warmer, humid conditions increase pest generations and fungal disease risk.
Insect Pest Pressure
Moderate — common pests appear but manageable with monitoring.
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 | Moderate | Mar, Apr, May, Jun, Jul, Aug, Sep, Oct |
| Japanese beetles | Moderate | Jun, Jul, Aug |
| Squash vine borers | High | May, Jun, Jul |
| Stink bugs | High | May, Jun, Jul, Aug, Sep |
| Whiteflies | Moderate | Jun, Jul, Aug, Sep |
| Spider mites | Moderate | Jul, Aug |
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
- Watch for powdery mildew, downy mildew, blight — common in your climate
Cover Crops for Cobb County
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 | Apr 4 | Aug 30 | — | Rapid growth, attracts pollinators, suppresses weeds |
| Cowpeas (southern peas) | Apr 11 | Aug 23 | ✓ Yes | Excellent nitrogen fixer for warm climates, edible |
| Sorghum-sudan grass | Apr 11 | Aug 23 | — | Massive biomass, breaks compaction, suppresses nematodes |
| White clover | Mar 3 | Aug 23 | ✓ 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 | Apr 30 | Oct 11 | — | 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 | Sep 5 | Mar 10 | ✓ Yes | Fixes nitrogen, good for heavy clay soils |
| Crimson clover | Aug 27 | Mar 17 | ✓ Yes | Fixes nitrogen, attracts pollinators in spring |
| Daikon radish | Sep 16 | Mar 10 | — | Deep taproot breaks compaction, excellent for clay soils |
| Hairy vetch | Aug 12 | Mar 10 | ✓ Yes | Excellent nitrogen fixer, good for depleted soils |
| Oats | Sep 29 | Mar 10 | — | Quick biomass, winterkills in cold zones — no spring tillage needed |
| Winter rye | Aug 4 | Mar 10 | — | Suppresses weeds, prevents erosion, breaks up compacted soil |
| Winter wheat | Aug 10 | Mar 17 | — | Erosion control, weed suppression, good biomass |
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: 7 mph
Fall: 7 mph Winter: 8 mph
Prevailing wind: SW. Low wind — no windbreak needed for most crops.
Windbreak Benefit
3.3/10
Low need — wind is not a major factor in your garden planning.
Frost Pocket Risk
Moderate
Some terrain variation (409 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
28,508 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 250 gal tank.
Legal Status
Unrestricted
Rainwater harvesting is fully legal in your state with no restrictions.
Best Collection Months
Mar, Jun, Jul, Aug
Highest rainfall months — your barrels will fill up quickly during these months.
Months to Draw From Storage
Feb, May, 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 57.2 inches of rain per year
- A 1,000 sq ft roof can collect roughly 28,508 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 Cobb County
Soil Type
Clay Loam
Soil pH 5.3–6.5 · 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
215-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.
Free Garden Planner
Plan your entire garden season — organize planting dates, track what you're growing, and know exactly when to start seeds, transplant, and harvest.
Recommended for Your Garden
Cedar raised bed kit — ideal for poor soil, clay, or small-space gardening.
Improve drainage and aeration in heavy clay soils with horticultural perlite.
Premium blend of topsoil, compost, and perlite formulated for raised beds.
🥬 Vegetables to Grow in Cobb County
113 vegetables that grow well in Zone 7b with planting dates for Cobb County.
Show all 113 vegetables with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Acorn Squash | Mar 3 | Apr 7 | Apr 14 | Jul 7 – Aug 11 | 80–100 |
| Amaranth | Feb 10 | Apr 7 | Apr 14 | Jul 14 – Sep 1 | 90–120 |
| Artichoke | — | — | Apr 14 | Aug 18 – Oct 27 | 120–180 |
| Arugula | Feb 24 | Mar 17 | Mar 31 | May 5 – Jul 7 | 30–50 |
| Asparagus | — | — | Apr 14 | — | 730–1095 |
| Beets | — | Mar 17 | — | May 12 – Jun 9 | 50–70 |
| Belgian Endive | Feb 24 | Mar 17 | Mar 31 | Jul 21 – Sep 15 | 110–150 |
| Bitter Melon | Feb 10 | Apr 7 | Apr 14 | Jun 16 – Jul 28 | 60–90 |
| Black Beans | — | Apr 7 | — | Jul 7 – Aug 25 | 90–120 |
| Bok Choy | Feb 24 | Mar 17 | Mar 31 | May 12 – Jun 16 | 40–60 |
| Broccoli | Feb 24 | Mar 17 | Mar 31 | Jun 2 – Jul 14 | 60–90 |
| Broccoli Rabe | Feb 24 | Mar 17 | Mar 31 | May 12 – Jun 16 | 40–60 |
| Brussels Sprouts | Feb 24 | Mar 17 | Mar 31 | Jun 30 – Aug 25 | 90–130 |
| Butternut Squash | Mar 3 | Apr 7 | Apr 14 | Jul 14 – Aug 18 | 85–110 |
| Cabbage | Feb 24 | Mar 17 | Mar 31 | Jun 2 – Jul 28 | 60–100 |
| Calabash | Feb 10 | Apr 7 | Apr 14 | Jul 7 – Sep 1 | 80–120 |
| Cardoon | — | — | Apr 14 | Aug 18 – Sep 29 | 120–150 |
| Carrots | — | Mar 17 | — | May 19 – Jun 23 | 60–80 |
| Cauliflower | Feb 24 | Mar 17 | Mar 31 | May 26 – Jul 28 | 55–100 |
| Celeriac | Feb 24 | Mar 17 | Mar 31 | Jul 14 – Aug 18 | 100–120 |
| Celery | Feb 24 | Mar 17 | Mar 31 | Jun 23 – Aug 18 | 80–120 |
| Celtuce | Feb 24 | Mar 17 | Mar 31 | Jun 2 – Jul 14 | 60–90 |
| Chard | Feb 24 | Mar 17 | Mar 31 | May 26 – Jul 14 | 50–60 |
| Chayote | Feb 10 | Apr 7 | Apr 14 | Aug 18 – Oct 27 | 120–180 |
| Chickpeas | Feb 24 | Mar 17 | Mar 31 | Jun 23 – Aug 4 | 80–110 |
| Chicory | Feb 24 | Mar 17 | Mar 31 | Jun 2 – Jul 14 | 60–85 |
| Chinese Cabbage | Feb 24 | Mar 17 | Mar 31 | May 26 – Jun 23 | 50–70 |
| Christmas Lima Beans | Feb 10 | Apr 7 | Apr 14 | Jul 7 – Aug 11 | 80–100 |
| Collard Greens | Feb 24 | Mar 17 | Mar 31 | May 26 – Jul 28 | 55–75 |
| Corn | — | Apr 7 | — | Jun 9 – Aug 4 | 60–100 |
| Cowpeas | — | Apr 7 | — | Jun 9 – Jul 21 | 60–90 |
| Cress | Feb 24 | Mar 17 | Mar 31 | Apr 14 – May 5 | 14–21 |
| Crookneck Squash | Mar 3 | Apr 7 | Apr 14 | Jun 2 – Jun 30 | 45–60 |
| Crosne | — | Mar 17 | — | Aug 18 – Oct 20 | 150–200 |
| Cucumber | Mar 3 | Apr 7 | Apr 14 | Jun 9 – Aug 4 | 50–70 |
| Daikon | — | Mar 17 | — | May 12 – Jun 9 | 50–70 |
| Delicata Squash | Mar 3 | Apr 7 | Apr 14 | Jul 7 – Aug 11 | 80–100 |
| Edamame | — | Apr 7 | — | Jun 23 – Aug 4 | 75–100 |
| Eggplant | Jan 27 | Apr 7 | Apr 14 | Jun 23 – Aug 25 | 65–85 |
| Endive | Feb 24 | Mar 17 | Mar 31 | May 19 – Jun 23 | 45–65 |
| Escarole | Feb 24 | Mar 17 | Mar 31 | May 26 – Jun 23 | 50–70 |
| Fava Beans | Feb 24 | Mar 17 | Mar 31 | Jun 16 – Jul 28 | 75–100 |
| Fennel | Feb 10 | Apr 7 | Apr 14 | Jun 16 – Jul 28 | 60–90 |
| Garlic | — | — | — | — | 90–240 |
| Green Beans | — | Apr 7 | — | Jun 2 – Jul 28 | 50–65 |
| Horseradish | — | — | Apr 14 | Aug 18 – Oct 27 | 120–180 |
| Hot Peppers | Jan 27 | Apr 7 | Apr 14 | Jun 23 – Sep 29 | 70–120 |
| Hubbard Squash | Mar 3 | Apr 7 | Apr 14 | Jul 28 – Sep 1 | 100–120 |
| Jicama | Feb 10 | Apr 7 | Apr 14 | Aug 18 – Oct 27 | 120–180 |
| Kabocha | Mar 3 | Apr 7 | Apr 14 | Jul 14 – Aug 11 | 85–100 |
| Kai Lan | Feb 24 | Mar 17 | Mar 31 | May 19 – Jun 16 | 45–60 |
| Kale | Feb 24 | Mar 17 | Mar 31 | May 26 – Jul 21 | 50–70 |
| Kidney Beans | — | Apr 7 | — | Jul 7 – Aug 11 | 85–110 |
| Kohlrabi | Feb 24 | Mar 17 | Mar 31 | May 19 – Jun 23 | 45–65 |
| Komatsuna | Feb 24 | Mar 17 | Mar 31 | May 5 – Jun 9 | 35–50 |
| Leeks | Feb 24 | Mar 17 | Mar 31 | Jun 30 – Sep 15 | 90–150 |
| Lentils | Feb 24 | Mar 17 | Mar 31 | Jun 23 – Aug 4 | 80–110 |
| Lettuce | Feb 24 | Mar 17 | Mar 31 | May 5 – Jul 14 | 30–60 |
| Lima Beans | — | Apr 7 | — | Jun 9 – Jul 21 | 60–90 |
| Loofah | Feb 10 | Apr 7 | Apr 14 | Jul 28 – Sep 29 | 100–150 |
| Luffa | Feb 10 | Apr 7 | Apr 14 | Jul 14 – Sep 29 | 90–150 |
| Mache | Feb 24 | Mar 17 | Mar 31 | May 12 – Jun 16 | 40–60 |
| Malabar Spinach | Feb 10 | Apr 7 | Apr 14 | Jun 9 – Jul 7 | 55–70 |
| Melon | Mar 3 | Apr 7 | Apr 14 | Jun 23 – Aug 11 | 70–100 |
| Microgreens | Feb 24 | Mar 17 | Mar 31 | Apr 7 – May 5 | 7–21 |
| Mitsuba | Feb 24 | Mar 17 | Mar 24 | May 19 – Jul 14 | 50–70 |
| Mizuna | Feb 24 | Mar 17 | Mar 31 | May 5 – Jun 2 | 30–45 |
| Mustard Greens | Feb 24 | Mar 17 | Mar 31 | May 5 – Jul 7 | 30–50 |
| Napa Cabbage | Feb 24 | Mar 17 | Mar 31 | May 26 – Jun 30 | 55–75 |
| New Zealand Spinach | Feb 10 | Apr 7 | Apr 14 | Jun 9 – Jul 7 | 55–70 |
| Okra | Feb 10 | Apr 7 | Apr 14 | Jun 9 – Aug 4 | 50–65 |
| Onion | Feb 24 | Mar 17 | Mar 31 | Jun 30 – Aug 18 | 90–120 |
| Pac Choi | Feb 24 | Mar 17 | Mar 31 | May 12 – Jun 9 | 40–55 |
| Parsnip | — | Mar 17 | — | Jun 30 – Aug 11 | 100–130 |
| Patty Pan Squash | Mar 3 | Apr 7 | Apr 14 | Jun 2 – Jun 30 | 45–60 |
| Peas | Feb 24 | Mar 17 | Mar 31 | May 26 – Jul 21 | 55–70 |
| Peppers | Jan 27 | Apr 7 | Apr 14 | Jun 16 – Aug 25 | 60–90 |
| Pole Beans | Feb 10 | Apr 7 | Apr 14 | Jun 9 – Aug 4 | 55–70 |
| Potatoes | Feb 10 | Apr 7 | Apr 14 | Jun 23 – Sep 1 | 70–120 |
| Pumpkin | Mar 3 | Apr 7 | Apr 14 | Jul 14 – Sep 1 | 85–120 |
| Purslane | Feb 24 | Mar 17 | Mar 31 | May 12 – Jun 16 | 40–60 |
| Radicchio | Feb 24 | Mar 17 | Mar 31 | Jun 2 – Jul 7 | 60–80 |
| Radish | — | Mar 17 | — | Apr 14 – May 5 | 22–35 |
| Rhubarb | — | — | Apr 21 | — | 365–730 |
| Romanesco | Feb 24 | Mar 17 | Mar 31 | Jun 16 – Jul 28 | 75–100 |
| Rutabaga | — | Mar 17 | — | Jun 9 – Jul 14 | 80–100 |
| Salsify | — | Mar 17 | — | Jun 30 – Aug 11 | 100–130 |
| Savoy Cabbage | Feb 24 | Mar 17 | Mar 31 | Jun 9 – Aug 4 | 70–110 |
| Scallions | Feb 24 | Mar 17 | Mar 31 | May 26 – Jun 23 | 50–70 |
| Scarlet Runner Beans | Feb 10 | Apr 7 | Apr 14 | Jun 16 – Jul 21 | 60–80 |
| Shallot | Feb 24 | Mar 17 | Mar 31 | Jun 30 – Aug 18 | 90–120 |
| Shiso | Feb 10 | Apr 7 | Apr 14 | Jun 9 – Aug 4 | 50–70 |
| Snap Peas | Feb 10 | Apr 7 | Apr 14 | Jun 9 – Aug 4 | 55–70 |
| Snow Peas | Feb 24 | Mar 17 | Mar 31 | May 26 – Jul 21 | 50–65 |
| Soybeans | — | Apr 7 | — | Jun 30 – Aug 25 | 80–120 |
| Spaghetti Squash | Mar 3 | Apr 7 | Apr 14 | Jul 14 – Aug 11 | 85–100 |
| Spinach | Feb 24 | Mar 17 | Mar 31 | May 5 – Jul 7 | 35–50 |
| Squash (Summer) | Mar 3 | Apr 7 | Apr 14 | Jun 2 – Aug 4 | 45–65 |
| Squash (Winter) | Mar 3 | Apr 7 | Apr 14 | Jul 7 – Sep 1 | 80–120 |
| Sunchoke | — | — | Apr 14 | Aug 4 – Sep 29 | 110–150 |
| Sunflower | Feb 10 | Apr 7 | Apr 14 | Jun 23 – Aug 11 | 70–100 |
| Sweet Corn | — | Apr 7 | — | Jun 9 – Jul 21 | 60–90 |
| Sweet Potatoes | Feb 10 | Apr 7 | Apr 14 | Jul 14 – Sep 1 | 90–120 |
| Tatsoi | Feb 24 | Mar 17 | Mar 31 | May 5 – Jun 9 | 35–50 |
| Tomatillo | Feb 10 | Apr 7 | Apr 14 | Jun 16 – Aug 25 | 60–85 |
| Tomatoes | Feb 10 | Apr 7 | Apr 14 | Jun 16 – Aug 25 | 60–85 |
| Turnip | — | Mar 17 | — | Apr 28 – Jun 2 | 40–60 |
| Watercress | Feb 24 | Mar 17 | Mar 31 | May 12 – Jun 16 | 40–60 |
| Watermelon | Mar 3 | Apr 7 | Apr 14 | Jun 23 – Aug 11 | 70–100 |
| Wax Beans | — | Apr 7 | — | Jun 2 – Jul 28 | 50–65 |
| Winter Melon | Feb 10 | Apr 7 | Apr 14 | Jul 14 – Sep 1 | 90–120 |
| Yard Long Beans | Feb 10 | Apr 7 | Apr 14 | Jun 9 – Jul 21 | 55–80 |
| Zucchini | Mar 3 | Apr 7 | Apr 14 | Jun 2 – Jul 28 | 45–60 |
🍓 Fruits to Grow in Cobb County
31 fruits that grow well in Zone 7b with planting dates for Cobb County.
Show all 31 fruits with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Alpine Strawberries | — | — | Apr 21 | Jul 21 – Nov 3 | 90–180 |
| Aronia | — | — | Apr 21 | — | 730–1095 |
| Blackberries | — | — | Apr 21 | — | 365–730 |
| Blueberries | — | — | Apr 21 | — | 730–1095 |
| Boysenberries | — | — | Apr 21 | — | 365–730 |
| Cantaloupe | — | — | Apr 21 | Jun 30 – Aug 4 | 70–90 |
| Che Fruit | — | — | Apr 21 | — | 1095–1825 |
| Cranberries | — | — | Apr 21 | — | 730–1095 |
| Currants | — | — | Apr 21 | — | 730–1095 |
| Elderberries | — | — | Apr 21 | — | 730–1095 |
| Figs | — | — | Apr 21 | — | 730–1825 |
| Goji Berries | — | — | Apr 21 | — | 730–1095 |
| Gooseberries | — | — | Apr 21 | — | 730–1095 |
| Grapes | — | — | Apr 21 | — | 730–1095 |
| Ground Cherry | — | — | Apr 21 | Jun 30 – Aug 25 | 65–80 |
| Hardy Kiwi | — | — | Apr 21 | — | 1095–1825 |
| Haskaps | — | — | Apr 21 | — | 730–1095 |
| Honeydew | — | — | Apr 21 | Jul 14 – Aug 25 | 80–110 |
| Jostaberry | — | — | Apr 21 | — | 730–1095 |
| Kiwi | — | — | Apr 21 | — | 1095–1825 |
| Lingonberries | — | — | Apr 21 | — | 730–1095 |
| Loquat | — | — | Apr 21 | — | 730–1825 |
| Medlar | — | — | Apr 21 | — | 1095–1825 |
| Mulberries | — | — | Apr 21 | — | 730–1825 |
| Pawpaw | — | — | Apr 21 | — | 1095–2555 |
| Persimmon | — | — | Apr 21 | — | 1095–2555 |
| Pomegranate | — | — | Apr 21 | — | 730–1095 |
| Quince | — | — | Apr 21 | — | 1095–1825 |
| Raspberries | — | — | Apr 21 | — | 365–730 |
| Serviceberries | — | — | Apr 21 | — | 730–1095 |
| Strawberries | — | — | Apr 21 | Jul 21 – Dec 1 | 90–365 |
🌿 Herbs to Grow in Cobb County
39 herbs that grow well in Zone 7b with planting dates for Cobb County.
Show all 39 herbs with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Angelica | Feb 24 | Mar 17 | Mar 24 | — | 365–730 |
| Anise | Feb 24 | Mar 17 | Mar 24 | Jun 23 – Sep 8 | 90–120 |
| Basil | Feb 10 | Apr 7 | Apr 14 | Jun 9 – Aug 11 | 50–75 |
| Bee Balm | — | — | Apr 7 | Jul 7 – Sep 22 | 90–120 |
| Borage | Feb 24 | Mar 17 | Mar 24 | May 19 – Jul 7 | 50–60 |
| Caraway | Feb 24 | Mar 17 | Mar 24 | — | 365–450 |
| Catnip | — | — | Apr 7 | Jun 9 – Aug 11 | 60–80 |
| Chamomile | Feb 24 | Mar 17 | Mar 24 | May 26 – Aug 4 | 60–90 |
| Chervil | Feb 24 | Mar 17 | Mar 24 | May 5 – Jul 7 | 40–60 |
| Chives | — | — | Apr 7 | Jun 9 – Aug 18 | 60–90 |
| Cilantro | Feb 24 | Mar 17 | Mar 24 | May 5 – Jul 7 | 40–60 |
| Comfrey | — | — | Apr 7 | Jun 9 – Aug 18 | 60–90 |
| Cumin | Feb 24 | Mar 17 | Mar 24 | Jul 7 – Sep 8 | 100–120 |
| Dill | Feb 24 | Mar 17 | Mar 24 | May 5 – Jul 7 | 40–60 |
| Echinacea | — | — | Apr 7 | Aug 11 – Nov 17 | 120–180 |
| Epazote | Feb 10 | Apr 7 | Apr 14 | Jun 2 – Jul 28 | 45–60 |
| Fennel (herb) | Feb 24 | Mar 17 | Mar 24 | May 26 – Aug 4 | 60–90 |
| Feverfew | — | — | Apr 7 | Jul 7 – Sep 22 | 90–120 |
| Garlic Chives | — | — | Apr 7 | Jun 9 – Aug 18 | 60–90 |
| Horehound | — | — | Apr 7 | Jun 23 – Aug 18 | 75–90 |
| Hyssop | — | — | Apr 7 | Jun 16 – Aug 18 | 70–90 |
| Lavender | — | — | Apr 7 | Jul 7 – Nov 17 | 90–200 |
| Lemon Balm | — | — | Apr 7 | Jun 9 – Jul 28 | 60–70 |
| Lemon Thyme | — | — | Apr 7 | Jun 16 – Aug 18 | 70–90 |
| Lovage | — | — | Apr 7 | Jun 16 – Aug 18 | 70–90 |
| Marjoram | — | — | Apr 7 | Jun 9 – Aug 18 | 60–90 |
| Mint | — | — | Apr 7 | Jun 9 – Aug 18 | 60–90 |
| Oregano | — | — | Apr 7 | Jun 9 – Aug 18 | 60–90 |
| Parsley | Feb 24 | Mar 17 | Mar 24 | May 26 – Jul 28 | 60–80 |
| Rosemary | — | — | Apr 7 | Jun 30 – Nov 17 | 80–180 |
| Rue | — | — | Apr 7 | Jun 16 – Aug 18 | 70–90 |
| Sage | — | — | Apr 7 | Jun 23 – Aug 18 | 75–90 |
| Savory | — | — | Apr 7 | Jun 2 – Jul 28 | 50–70 |
| Sorrel | Feb 24 | Mar 17 | Mar 24 | May 5 – Jul 7 | 40–60 |
| Tarragon | — | — | Apr 7 | Jun 9 – Aug 18 | 60–90 |
| Thai Basil | Feb 10 | Apr 7 | Apr 14 | Jun 9 – Aug 11 | 50–75 |
| Thyme | — | — | Apr 7 | Jun 16 – Aug 18 | 70–90 |
| Valerian | — | — | Apr 7 | Aug 11 – Nov 17 | 120–180 |
| Yarrow | — | — | Apr 7 | Jul 7 – Sep 22 | 90–120 |
Monthly Planting Guide for Cobb County
Gardening Guides & Resources
Helpful guides from The Ultimate Homestead to improve your garden in Cobb County.
Frequently Asked Questions
What planting zone is Cobb County, GA?
Cobb 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 Cobb County, GA?
Based on 30 years of NOAA weather station data, the median last spring frost in Cobb County falls around March 31. In 8 out of 10 years, last frost lands between March 15 and April 17 — a 32-day window of variability. Use April 17 as your conservative safe-to-plant date for frost-sensitive crops.
When is the first fall frost in Cobb County, GA?
The median first fall frost in Cobb County arrives around November 1. In cold years it can arrive as early as October 18; in mild years as late as November 23. Harvest or protect frost-sensitive crops — tomatoes, peppers, basil, squash — before this date.
How long is the growing season in Cobb County?
Cobb County has a frost-free growing season of approximately 215 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 3.3 days per decade.
What is the soil like in Cobb County for gardening?
Cobb County has predominantly Clay Loam soil with a pH range of 5.3–6.5 and Somewhat Poorly Drained drainage. Most vegetables and herbs grow well with standard composting and seasonal soil amendment.
What is grown commercially in Cobb County?
Cobb County has commercial agriculture that includes Cotton, Poultry, Peanuts. These crops reflect the local climate and soil conditions — what succeeds commercially often translates well to home gardens in the same area.
Is Cobb County a good location for home gardening?
Cobb County scores 43/100 (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.
Plan Your Garden with Confidence
Get our free Garden Planner — designed to help Cobb County gardeners in Zone 7b organize planting dates, track what's growing, and never miss a planting window.
Get Your Free Garden Planner →Free download. Plan your entire garden season in minutes.
