When To Plant Cilantro Seeds In California

The best time to plant cilantro seeds in California is in early spring or early fall, depending on your region.
 
California’s diverse climate means when to plant cilantro seeds can shift dramatically from one area to the next.
 
In cooler coastal zones, planting cilantro seeds in California works well from March through May and again in September.
 
In hotter inland valleys, you’ll want to plant cilantro seeds in California during early spring or late fall to avoid the scorching heat.
 
If you’re wondering when to plant cilantro seeds in California, the short answer is: whenever daytime temps stay between 50°F and 85°F.
 
Cilantro bolts quickly in heat, so timing your planting is everything.
 
In this post, we’ll break down exactly when to plant cilantro seeds in California by region, plus tips to keep your crop productive longer.
 
Let’s dig in.
 

When to Plant Cilantro Seeds in California by Region

When you plant cilantro seeds in California really depends on where you live.
 
The state has so many microclimates that a single planting date won’t work for everyone.
 
Here’s how to figure out the best window for your area.
 

1. Coastal California (San Francisco, Santa Barbara, San Diego)

If you’re near the coast, you’re in luck because cilantro loves mild weather.
 
Plant cilantro seeds in California coastal areas from March to May and again from September to October.
 
Coastal fog and ocean breezes keep temperatures moderate, so your cilantro won’t bolt as fast.
 
You can even succession plant every three weeks for a continuous harvest.
 

2. Inland Valleys (Sacramento, Fresno, San Joaquin)

Inland areas get hot fast, so when to plant cilantro seeds in California here means beating the heat.
 
Start seeds indoors in February or direct sow in early March.
 
Then plant another round in late September or early October for a fall crop.
 
By the time summer hits, your spring cilantro will likely bolt, so plan for that.
 

3. Southern California (Los Angeles, Riverside, Orange County)

Southern California offers a long growing season, but intense summer heat can ruin cilantro.
 
The best time to plant cilantro seeds in California’s southern regions is February through April and again in October.
 
If you’re in a hotter pocket like Riverside, aim for fall planting only.
 
You can also grow cilantro in partial shade to extend the season.
 

4. Mountain and Desert Regions

In the mountains, plant cilantro seeds in California from May to June after the last frost.
 
In the desert, your window is narrow, so plant in late fall or early spring.
 
Desert summers are brutal, so cilantro there is strictly a cool-season crop.
 

Why Timing Matters When You Plant Cilantro Seeds in California

Cilantro is a cool-weather herb, and that’s the biggest factor in when to plant cilantro seeds in California.
 
Once temperatures climb above 85°F, cilantro bolts, sending up a flower stalk and turning leaves bitter.
 
That’s why planting at the right time is crucial for a tasty harvest.
 
If you plant too late in spring, you’ll get a tiny window before bolting.
 
If you plant too early in fall, the lingering heat can stress seedlings.
 
The sweet spot is when soil temps are between 55°F and 70°F.
 

1. Bolting Is the Enemy

Bolting happens when cilantro gets stressed by heat or long daylight hours.
 
When you plant cilantro seeds in California at the right time, you delay bolting significantly.
 
You can also choose slow-bolt varieties like ‘Calypso’ or ‘Santo’ for extra insurance.
 

2. Succession Planting Extends Your Harvest

Instead of one big planting, sow small batches every two to three weeks.
 
This way, when to plant cilantro seeds in California becomes a ongoing strategy rather than a one-time event.
 
You’ll always have fresh cilantro coming up while older plants finish.
 

3. Fall Planting Often Beats Spring

In many parts of California, fall is actually the best time to plant cilantro seeds.
 
The weather cools gradually, and cilantro thrives through mild winters in zones 9 and 10.
 
A fall crop often lasts longer than a spring one because heat arrives slowly.
 

How to Plant Cilantro Seeds in California for Best Results

Once you know when to plant cilantro seeds in California, the next step is doing it right.
 
Cilantro seeds are actually two seeds inside one husk, so you can gently crush them before planting to improve germination.
 
Sow seeds about a quarter inch deep in loose, well-draining soil.
 
Keep the soil consistently moist until seedlings emerge, usually in 7 to 10 days.
 
Space plants 6 to 8 inches apart so they have room to grow.
 
If you’re container growing, you can control conditions better and extend your season.
 

So, When to Plant Cilantro Seeds in California?

When to plant cilantro seeds in California comes down to avoiding extreme heat and timing your crop for mild temperatures.
 
Coastal areas can plant in spring and fall, inland areas should focus on early spring and late fall, and desert gardeners should stick to fall or early spring.
 
The best time to plant cilantro seeds in California is whenever your local temps stay between 50°F and 85°F.
 
With succession planting and a little shade, you can enjoy fresh cilantro almost year-round in many parts of the state.
 
So grab your seeds, pick your window, and get planting.