Best Time to Plant Herbs in USA – Zone by Zone Planting Guide 2026

fasalbachao.com July 9, 2022

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Last updated on April 12th, 2026 at 08:03 pm

Growing fresh herbs at home is one of the most satisfying and practical things any American gardener can do. A handful of fresh basil, a sprig of rosemary, or a bunch of homegrown mint transforms everyday cooking into something extraordinary. But the single most common reason herb gardens fail is simple — wrong timing.

Plant basil in March in Minnesota and a late frost will kill it overnight. Plant coriander in August in Texas and it bolts to seed before you get a single harvest. Understanding when to plant is just as important as understanding how to plant.

This complete guide covers everything you need to know about the best time to plant herbs in the USA — organized by USDA hardiness zone, state, season, and individual herb — so you can grow a thriving herb garden anywhere in America.

1. Understanding USDA Hardiness Zones

The USDA Plant Hardiness Zone Map divides the United States into 13 zones based on average annual minimum winter temperatures. Each zone is 10°F warmer or colder than the adjacent zone. For herb gardeners this map is the single most important reference tool — it tells you exactly when your last frost typically occurs, which determines when it is safe to plant frost-sensitive herbs outdoors.

USDA Zone	Average Min Winter Temp	Example States/Cities
Zone 3	-40°F to -30°F	Northern Minnesota, Montana
Zone 4	-30°F to -20°F	Wisconsin, North Dakota
Zone 5	-20°F to -10°F	Chicago IL, Columbus OH
Zone 6	-10°F to 0°F	Kansas City, Virginia
Zone 7	0°F to 10°F	Oklahoma, North Carolina
Zone 8	10°F to 20°F	Seattle, Georgia, Texas
Zone 9	20°F to 30°F	California, Florida
Zone 10	30°F to 40°F	Miami FL, Southern California
Zone 11	40°F to 50°F	Hawaii, extreme South Florida

💡 Find your exact USDA zone at the official USDA Plant Hardiness Zone Map: planthardiness.ars.usda.gov

2. Last Frost Dates by US Region

Your last spring frost date is the most critical piece of information for timing herb planting. Most warm-season herbs should not be planted outdoors until after this date has passed.

US Region	Average Last Spring Frost	Average First Fall Frost
Pacific Northwest	March 1 – April 1	October 15 – November 1
Northern California	February 1 – March 15	November 1 – December 1
Southern California	January 1 – February 1	December 1 – January 1
Southwest (AZ, NM)	March 1 – April 15	October 15 – November 15
Mountain West (CO, UT)	April 15 – May 15	September 15 – October 15
Midwest (IL, OH, IN)	April 15 – May 15	October 1 – October 15
Great Plains (KS, NE)	April 1 – May 1	October 1 – October 15
Upper Midwest (MN, WI)	May 1 – May 31	September 15 – October 1
Northeast (NY, MA, CT)	April 15 – May 15	October 1 – October 15
Mid-Atlantic (VA, MD)	March 15 – April 15	October 15 – November 1
Southeast (GA, SC, AL)	February 15 – March 15	November 1 – December 1
Deep South (MS, LA)	February 1 – March 1	November 15 – December 15
Florida	January 1 – February 15	December 1 – January 1
Texas (North)	March 15 – April 15	November 1 – November 15
Texas (South)	February 1 – March 1	December 1 – January 1

💡 Find your exact last frost date using the Old Farmer’s Almanac frost date calculator: almanac.com/gardening/frostdates

3. Best Time to Plant Herbs by USDA Zone

Zone 3–4 (Northern Minnesota, Wisconsin, Montana, North Dakota)

These zones experience harsh winters and short growing seasons. Herb gardening here requires careful timing and often season extension tools like cold frames and row covers.

Start herbs indoors: Late March to mid-April
Transplant outdoors: After May 15 to June 1
Direct sow outdoors: June 1 to June 15
Best herbs for these zones: Chives, mint, parsley, dill, lemon balm, thyme, lovage
Growing season length: Approximately 90 to 120 days

Zone 5–6 (Chicago, Ohio, Virginia, Kansas City, New England)

The most common zone for American gardeners. Four distinct seasons with moderate summers and cold winters.

Start herbs indoors: Late February to late March
Transplant outdoors: After May 1 to May 15
Direct sow outdoors: April 15 to May 15
Best herbs: Basil, parsley, dill, cilantro, chives, thyme, oregano, sage, rosemary (as annual), mint
Growing season length: Approximately 150 to 180 days

Zone 7 (Oklahoma, North Carolina, Tennessee, Oregon coast)

Mild winters and warm summers make this an excellent herb growing zone with a long productive season.

Start herbs indoors: Late January to mid-February
Transplant outdoors: After April 1 to April 15
Direct sow outdoors: March 15 to April 15
Best herbs: All common herbs plus lemongrass, tulsi, Mexican oregano
Growing season length: Approximately 180 to 210 days

Zone 8 (Seattle, Georgia, Central Texas, Louisiana)

Excellent herb growing conditions. Most herbs thrive here and many perennial herbs survive winter outdoors.

Start herbs indoors: January to early February
Transplant outdoors: After March 1 to March 15
Direct sow outdoors: February 15 to March 15
Best herbs: All herbs including rosemary as perennial, lemongrass, ginger, turmeric
Growing season length: Approximately 210 to 240 days

Zone 9 (California, Arizona, Northern Florida)

Near year-round growing is possible. Cool-season herbs thrive in winter and warm-season herbs dominate summer.

Cool season herbs: October through March
Warm season herbs: March through September
Best herbs: Virtually all culinary and medicinal herbs
Year-round possibilities: Rosemary, thyme, oregano, lemon verbena, bay laurel

Zone 10–11 (Miami, Hawaii, Southern California)

True year-round herb gardening. Warm-season herbs grow as perennials. The main challenge is managing summer heat for cool-season herbs.

Cool season herbs: November through February
Warm season herbs: Year-round
Special opportunity: Tropical herbs like moringa, lemongrass, and tulsi grow as permanent perennials

4. Best Time to Plant Herbs by Season

Spring — The Primary Herb Planting Season

Spring is the most important herb planting season for most American gardeners. As soil temperatures rise and frost risk fades, both cool-season and warm-season herbs can be established.

Herb	When to Start Indoors	When to Plant Outdoors
Basil	6–8 weeks before last frost	After last frost, soil 70°F+
Parsley	10–12 weeks before last frost	4 weeks before last frost
Cilantro	Not recommended	2–4 weeks before last frost
Dill	Not recommended	2 weeks before last frost
Chives	8–10 weeks before last frost	4–6 weeks before last frost
Oregano	8–10 weeks before last frost	After last frost
Thyme	8–10 weeks before last frost	2–4 weeks before last frost
Sage	6–8 weeks before last frost	After last frost
Rosemary	10–12 weeks before last frost	After last frost
Mint	Anytime indoors	After last frost
Lemon Balm	6–8 weeks before last frost	2 weeks before last frost
Fennel	Not recommended	After last frost

Summer — Maintaining and Succession Planting

Summer is about maintaining spring-planted herbs and making succession sowings of fast-growing herbs for continuous harvest.

Sow new cilantro every 3 weeks for continuous harvest before heat causes bolting
Plant a second round of dill in early summer for late summer harvest
Start fall herb transplants indoors in late summer (July to August)
Harvest warm-season herbs regularly to prevent premature flowering

Fall — Cool Season Herb Renaissance

Fall is dramatically underutilized by American herb gardeners. As summer heat fades, cool-season herbs experience a second golden window.

Herb	When to Plant in Fall	Expected Harvest
Cilantro	6–8 weeks before first frost	3–4 weeks after sowing
Dill	6–8 weeks before first frost	6–8 weeks after sowing
Parsley	8 weeks before first frost	Overwinters in Zones 6+
Chives	6 weeks before first frost	Spring harvest
Garlic Chives	September to October	Following spring
Fennel	8 weeks before first frost	Overwinters in Zones 6+

Winter — Indoor Herb Gardening

Winter does not mean the end of fresh herbs. A sunny south-facing windowsill, a grow light setup, or a heated greenhouse keeps herbs productive year-round.

Best herbs for indoor winter growing:

Mint — thrives in moderate indoor conditions
Basil — needs 6+ hours of light daily or grow lights
Chives — one of the easiest indoor herbs
Parsley — slow but reliable indoors
Thyme — handles indoor conditions well
Oregano — compact and low-maintenance indoors

5. Best Time to Plant Popular Herbs — Individual Guide

Basil

Best planting time: 2 weeks after last spring frost Soil temperature needed: 70°F minimum, 75–85°F ideal Basil is the most popular culinary herb in America and the most cold-sensitive. Even a light frost will blacken and kill basil plants instantly. Never rush basil outdoors. Start seeds indoors 6 to 8 weeks before your last frost date for the earliest possible outdoor harvest.

Zone	Start Indoors	Plant Outdoors
Zone 5	Early March	Mid-May
Zone 6	Late February	Late April
Zone 7	Early February	Early April
Zone 8	January	Mid-March
Zone 9–10	December–January	February–March

Cilantro (Coriander)

Best planting time: 2 to 4 weeks before last frost in spring, and 6 to 8 weeks before first frost in fall Cilantro is a cool-season herb that bolts rapidly in summer heat above 75°F. It is one of the few herbs that performs better in fall than spring in warmer states. In the South and Southwest fall planting is actually preferred. Sow directly — cilantro does not transplant well due to its taproot.

Rosemary

Best planting time: Spring after last frost (Zones 5–7), year-round (Zones 8–11) Rosemary is a Mediterranean perennial that is marginally hardy in colder zones. In Zones 7 and above it survives winter outdoors and grows into a large permanent shrub. In Zones 5 and 6 grow it in containers and bring it indoors for winter.

Mint

Best planting time: Spring after last frost, or fall in warm zones Mint is one of the most forgiving herbs in America — it survives cold winters, tolerates partial shade, and spreads enthusiastically. Always plant mint in containers to prevent it from taking over your garden. It can also be divided and replanted anytime during the growing season.

Thyme

Best planting time: Early spring, 2 to 4 weeks before last frost Thyme is a hardy perennial in Zones 5 and above. Once established it requires minimal care and produces reliably for years. Start from transplants for faster results as thyme is slow to grow from seed.

Oregano

Best planting time: Early spring after last frost Hardy perennial in Zones 5 and above. Greek oregano has the strongest flavor and is most recommended for culinary use. Oregano spreads readily and benefits from dividing every 2 to 3 years.

Parsley

Best planting time: 4 to 6 weeks before last frost in spring, or late summer for fall/winter harvest Parsley is a biennial that is hardy to Zone 5. It can be sown outdoors while temperatures are still cool. Soak seeds in warm water for 24 hours before sowing to improve germination speed.

Chives

Best planting time: Early spring, 4 to 6 weeks before last frost One of the hardiest and most reliable herbs for American gardens. Chives are perennial in Zones 3 and above, returning bigger and stronger each year. They are among the first herbs ready to harvest each spring.

Dill

Best planting time: After last frost in spring, every 3 weeks for succession harvest Dill is a fast-growing annual that bolts in heat. For a continuous supply sow a short row every 3 weeks from spring through early summer. In warmer states fall planting produces the best crop.

Sage

Best planting time: Spring after last frost Hardy perennial in Zones 5 and above. Sage grows slowly from seed — starting indoors 6 to 8 weeks before last frost gives you harvestable plants much earlier. Excellent companion plant for brassicas and carrots.

Lemongrass

Best planting time: Spring after last frost, soil temperature above 65°F Lemongrass is a tropical grass perennial in Zones 9 and above. In colder zones grow it as an annual or bring it indoors before the first fall frost. It grows vigorously in summer heat and can reach 3 to 5 feet tall.

6. Best Time to Plant Herbs Indoors vs Outdoors

Method	Best For	Key Advantage
Starting indoors	Basil, parsley, rosemary, sage, oregano, thyme	Head start of 4–8 weeks
Direct outdoor sowing	Cilantro, dill, fennel, anise	Better root development
Transplanting	Most herbs started indoors	Controlled early growth
Division/cuttings	Mint, chives, lemon balm, tarragon	Fastest establishment

How to harden off indoor-started herbs: Before transplanting outdoors, gradually expose seedlings to outdoor conditions over 7 to 10 days. Start with 1 hour of outdoor exposure in a sheltered spot, increasing daily. This prevents transplant shock and dramatically improves survival rates.

7. Best Time to Plant Herbs by US State

State	Last Frost	Best Outdoor Planting	Special Notes
California	Jan–Mar	Feb–Apr (cool), Mar–May (warm)	Near year-round growing
Texas	Feb–Apr	Mar–May (North), Feb–Mar (South)	Fall planting excellent
Florida	Jan–Feb	Feb–Mar (warm), Oct–Feb (cool)	Year-round possible
New York	Apr–May	May–June	Short season, indoor starts essential
Illinois	Apr–May	May 1–15	Start indoors in March
Georgia	Mar–Apr	Apr–May	Excellent herb state
Washington	Mar–Apr	Apr–May	Cool summers favor cool herbs
Arizona	Feb–Mar	Mar–Apr (cool), Sep–Oct (warm)	Desert — afternoon shade helps
Colorado	May–June	May 15–June 1	Short season, high altitude
Oregon	Mar–Apr	Apr–May	Similar to Washington
Michigan	May	May 15–June 1	Cold winters — perennials need protection
North Carolina	Mar–Apr	Apr–May	Long growing season
Virginia	Apr	Apr 15–May 1	Good all-round herb state
Minnesota	May–June	June 1–15	Shortest season — indoor starts critical
Ohio	Apr–May	May 1–15	Zone 5–6 conditions

8. Cool Season vs Warm Season Herbs

Cool Season Herbs

Thrive in soil temperatures of 55°F to 70°F. Most bolt and lose quality when temperatures exceed 80°F consistently.

Herb	Ideal Soil Temp	Bolts Above	Hardy to Zone
Cilantro	55–68°F	75°F	Annual
Dill	60–70°F	75°F	Annual
Parsley	50–70°F	80°F	Zone 5 biennial
Chives	60–70°F	85°F	Zone 3 perennial
Fennel	60–70°F	80°F	Zone 4 perennial
Arugula herb	45–65°F	70°F	Zone 4 annual

Warm Season Herbs

Require soil temperatures of 65°F to 85°F. Damaged or killed by frost.

Herb	Minimum Soil Temp	Ideal Soil Temp	Hardy to Zone
Basil	70°F	75–85°F	Annual everywhere
Lemongrass	65°F	75–85°F	Zone 9 perennial
Ginger	70°F	75–85°F	Zone 8 perennial
Tulsi	65°F	75–85°F	Zone 10 perennial
Stevia	65°F	70–80°F	Zone 8 perennial

Year-Round Perennial Herbs (Zones 5+)

These herbs survive winter outdoors and return each spring:

Thyme, oregano, sage, chives, mint, lemon balm, tarragon, lovage, and rosemary (Zones 7+) all establish permanent presence in your garden once planted — giving you years of harvests from a single planting investment.

9. Best Time to Plant Herbs in Pots & Containers

Container herb gardening is perfect for apartment dwellers, urban gardeners, and anyone without garden space. Pots also give you the flexibility to move herbs indoors before frost and outdoors when conditions warm.

Herb	Pot Size	Best Season to Plant	Sun Needed
Basil	8–12 inch	Spring after frost	6–8 hours full sun
Cilantro	8–12 inch	Early spring or fall	4–6 hours
Mint	12 inch minimum	Spring or fall	Partial shade fine
Parsley	8 inch	Early spring or fall	4–6 hours
Chives	6–8 inch	Early spring	4–6 hours
Rosemary	12–16 inch	Spring	6–8 hours full sun
Thyme	6–8 inch	Early spring	6–8 hours full sun
Oregano	8–10 inch	Spring	6–8 hours full sun
Lemongrass	5 gallon+	After last frost	6–8 hours full sun
Sage	12 inch	Spring	6–8 hours full sun

Top container tips for American herb gardeners:

Use quality potting mix — never garden soil in containers
Ensure drainage holes in every pot
Container herbs dry out 2x faster than ground-planted herbs — check daily in summer
Terracotta pots breathe better but dry faster than plastic
Group pots together to create a microclimate with higher humidity

10. Common Herb Planting Mistakes to Avoid

Planting basil too early This is the single most common mistake in American herb gardens. Basil planted while nights are still cool turns purple, sulks, and becomes disease-prone. Wait until two weeks after your last frost date and soil temperature reaches 70°F.

Rushing cilantro in summer Cilantro planted in June in most US states will bolt within 2 to 3 weeks. For summer cilantro in hot regions choose slow-bolt varieties like Leisure or Santo and provide afternoon shade.

Ignoring USDA zones Planting Mediterranean perennials like rosemary in Zone 5 without winter protection leads to dead plants by February. Know your zone and choose varieties rated hardy for your conditions.

Transplanting tap-rooted herbs Cilantro, dill, and fennel develop long taproots and hate being disturbed. Always sow these directly in their final position.

Inconsistent watering of new transplants Newly transplanted herbs need consistent moisture for the first 2 weeks to establish roots. After that most culinary herbs prefer slightly dry conditions rather than constantly wet soil.

Not hardening off indoor seedlings Moving seedlings directly from a warm indoor environment to full outdoor exposure causes transplant shock. Always harden off over 7 to 10 days.

11. Frequently Asked Questions

What is the best month to plant herbs in the USA?

For most of the USA April and May are the best months. Gardeners in Zones 8 to 10 can start as early as February and March. Gardeners in Zones 3 to 5 should wait until May or June for outdoor planting.

Can I plant herbs in fall in the USA?

Absolutely. Fall is actually the best time to plant cool-season herbs like cilantro, dill, and parsley in Zones 7 and warmer. In the Pacific Northwest and Northern California fall plantings often outperform spring plantings.

What is the easiest herb to grow in America?

Mint, chives, and lemon balm are the easiest herbs for American beginner gardeners. All three are cold-hardy perennials that return each year and require minimal care.

How do I know when the last frost is in my area?

The most reliable tool is the Old Farmer’s Almanac frost date calculator at almanac.com. Enter your zip code to get your average last spring frost and first fall frost dates.

Can I grow rosemary outdoors year-round in the USA?

In Zones 7 and above yes — rosemary is a hardy perennial that survives winter outdoors. For Zones 5 and 6 grow it in containers and bring indoors before temperatures drop below 20°F. In Zones 3 and 4 treat it as an annual or grow exclusively indoors.

What herbs grow best in the South?

The American South (Zones 7 to 9) is excellent for rosemary, thyme, oregano, basil, lemongrass, ginger, and turmeric. Cool-season herbs like cilantro and parsley perform best in fall and winter rather than summer.

What herbs grow best in the Pacific Northwest?

The cool moist Pacific Northwest climate is perfect for parsley, chives, mint, dill, cilantro, thyme, and oregano. Basil needs the warmest spots and benefits from black plastic mulch to warm the soil.

What herbs can I grow year-round in the USA?

In Zones 9 to 11 virtually all herbs grow year-round. In colder zones you can grow herbs indoors year-round under grow lights or on sunny south-facing windowsills. Chives, mint, and parsley are the most reliable indoor year-round herbs.