Folks, it’s almost tomato season. I can smell it—literally. That green, unmistakable scent is still clinging to my hands after repotting seedlings this morning. And with tomato season comes fresh salsa season—easily one of my favorite times of year.
If you’ve landed here, I’m guessing you feel the same way. You’re already thinking ahead, making sure every ingredient is ready to come straight from the garden. And when it comes to salsa, there’s one that never quite keeps up unless you plan for it: cilantro.
In this week’s post, we’re going to get you set up with everything you need to know to grow cilantro from seed—whether you’re planting it out in the garden or tucking a pot onto a sunny windowsill.
What Is Cilantro?
Cilantro (Coriandrum sativum) is one of those plants that tends to get boxed into a single role—but it’s far more versatile than most people realize. From root to seed, every part of the plant has been used in kitchens around the world for thousands of years.
Native to regions stretching from the eastern Mediterranean into parts of western Asia, cilantro evolved in a climate defined by mild, cool seasons and relatively short springs. That background tells you a lot about how it behaves in the garden—but we’ll come back to that later.
What most of us notice first is the aroma. The leaves have a bold, pungent, almost grassy scent—bright and unmistakable. The seeds, on the other hand, are something else entirely. Once dried, they develop a warm, fresh, slightly citrusy fragrance with subtle floral notes.
Same plant. Completely different experience.
Cilantro vs. Coriander—What Gives?
This is where things get confusing.
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Cilantro refers to the fresh leaves and stems
- Coriander refers to the dried seeds
They’re not two different crops—they’re simply two stages of the same plant.
To make things even more interesting, many parts of the world use the word coriander to describe the entire plant, leaves included. Here in the U.S., though, we’ve settled into using both terms separately.
So when you plant coriander seeds, you’re growing cilantro. And if you let that cilantro mature and go to seed, you’ll end up with coriander. Crystal clear—right?
More Than a Garnish
It’s easy to think of cilantro as something you toss into salsa—but that barely scratches the surface.
The leaves are widely used fresh in:
- Salsas and pico de gallo
- Curries and chutneys
- Dressings and marinades
- Soups, chili, sourdough skillets
- Rice dishes and salads
- Sauces like chimichurri and green salsas
I mean, tacos al pastor topped with onions and fresh cilantro—does it get any better?
But the seeds deserve just as much attention.
Coriander seeds are used:
- Whole or ground in spice blends
- In baking (Focaccia and Borodinsky)
- In pickling
- In sausages and cured meats
And sometimes in ways that catch people completely off guard.
We use coriander seeds as part of a “cola seasoning mix” when making fermented cherry cola with our ginger bug starter. It sounds unusual, but the citrusy, slightly floral notes play incredibly well with the fruit and spices. The result is a drink that’s bright and complex, delicious and healthy all at the same time (yes, that's possible)—without the price tag of the probiotic sodas lining store shelves.
How Cilantro Grows (and Why It Doesn’t Stick Around)
Cilantro isn’t a long-haul crop. It’s a cool-season annual that’s built to grow quickly, set seed, and move on.
In the right conditions, you can go from seed to harvest in as little as 3–4 weeks. Give it a bit more time—or a stretch of warm weather—and it will shift gears almost overnight, sending up a flower stalk and beginning the process of producing coriander seed.
This is what gardeners call bolting.
And cilantro is famous for it.
But here’s the important part: bolting isn’t a failure. It’s the plant doing exactly what it was designed to do.
What Triggers Bolting?
Cilantro responds strongly to:
- Rising temperatures
- Longer daylight hours
- Inconsistent moisture or stress
Once those signals stack up, the plant transitions from leaf production to reproduction. The leaves become smaller, the stems elongate, and before long, you’ll see delicate white flowers forming at the top.
From the plant’s perspective, the job is nearly done.
A Different Way to Think About Cilantro
If you approach cilantro like basil or parsley—something you plant once and harvest all summer—it’s going to disappoint you.
But if you treat it like a short-lived, fast-growing crop that comes in waves, everything starts to click.
Cilantro isn’t meant to stick around.
It’s meant to be replanted.
The Real Secret: Succession Planting
Rather than trying to fight bolting, the better approach is to work with the plant’s natural rhythm.
That means planting cilantro in succession—small batches, spaced out over time—so that as one planting begins to flower, another is just coming into its prime.
A simple approach looks like this:
- Sow a small patch every 2–3 weeks
- Harvest leaves while plants are young and vigorous
- Let a few plants mature if you want coriander seed
- Keep the cycle going
With this method, you’re not relying on a single planting to carry you through the season. You’re creating a steady supply.
Timing Matters More Than Anything
Because cilantro prefers cool conditions, your best windows are:
- Early to mid-spring
- Late summer into fall
In the heat of summer, growth slows and bolting speeds up—but even then, succession planting (and a bit of afternoon shade) can keep things going longer than you might expect.
If you’re growing cilantro with fresh salsa in mind, there’s an easy way to time it. Start planting right around the time you see your first tomato flowers appear, then continue sowing every couple of weeks through the summer. That way, as your tomatoes start coming in, you’ll always have fresh cilantro ready to go alongside them.
And don’t be afraid to let those two share a little space. We’ve even tucked cilantro in alongside our tomatoes so the plants cast a bit of shade during the hottest part of the afternoon. They get along just fine—and that little bit of protection can make a noticeable difference in how long the cilantro holds.
Now that you understand how cilantro grows, the next step is getting it started the right way—because with cilantro, how you plant it makes all the difference.
How to Grow Cilantro from Seed
Cilantro is best grown from seed—and thankfully, it’s about as straightforward as it gets.
Unlike some herbs, cilantro doesn’t love being transplanted. It has a delicate taproot that prefers to be left undisturbed, so you’ll get better results by sowing it directly where you want it to grow, whether that’s in the garden or a container.
Planting Basics
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Sow depth: about ¼ inch deep
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Spacing: scatter lightly, then thin to 4–6 inches apart
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Germination: typically 7–10 days under good conditions
- Sun: full sun to partial shade (especially in warmer weather)
You don’t need to overthink it—just keep the soil consistently moist while seeds are getting established, and they’ll do the rest.
How Much to Plant (Per Succession)
This is where a lot of people go wrong with cilantro.
Instead of planting a big patch all at once, it’s far more useful to plant smaller amounts, more often.
For us, that usually means sowing 2–3 row feet every couple of weeks. That’s enough to keep a steady supply coming without ending up with more than we can use at any one time.
Planted this way, a single packet of seeds can easily last the entire season.
Growing in Containers
Cilantro does just fine in pots, as long as you give it a little room to stretch out.
- Choose a container that’s at least 4–6 inches deep
- Use a well-draining potting mix
- Keep it evenly watered (containers dry out faster than garden beds)
If you’re growing indoors, light becomes the limiting factor. A bright, south-facing window can work, but you’ll get better, more consistent growth with a grow light.
A Quick Note on Thinning
It can feel a little counterintuitive, but giving cilantro space is worth it.
Overcrowded plants compete for light and airflow, which can lead to weaker growth and faster bolting. Thinning seedlings to a few inches apart helps each plant develop more fully—and gives you a better harvest in the long run.
Harvesting Cilantro
Just like lettuce, the key to harvesting cilantro is to leave the growing tip intact. That way, you’ll get a longer, more productive window before the plant moves on to flowering.
You can begin harvesting once plants are about 4–6 inches tall, which usually doesn’t take long.
How to Harvest Leaves
There are two good ways to go about it:
Cut-and-come-again: Snip outer stems near the base, allowing the center to keep growing
Whole plant harvest: Pull or cut the entire plant when it reaches a usable size
For most situations, the first method works best. Taking a few stems at a time keeps the plant producing a bit longer and fits nicely with succession planting—you’re harvesting from one patch while the next is coming up behind it.
Timing Your Harvest
Cilantro leaves are at their best when the plant is still young and growing vegetatively.
As the plant begins to prepare for flowering:
- Leaves become smaller
- Flavor can shift slightly
- Growth slows down
Once you see a central stalk starting to stretch upward, you’re on borrowed time for leaf production. At that point, it’s usually best to harvest what you can and let the plant finish out if you’re interested in seeds.
Letting Cilantro Go to Seed
If you leave a few plants alone, they’ll quickly transition from flowers to green seed clusters, and eventually to the familiar dried coriander seeds.
This stage is worth experiencing at least once—not just for the seeds, but for what it adds to the garden. The delicate white flowers attract pollinators and beneficial insects, and the plants take on a completely different look.
Harvesting Coriander Seeds
Seeds are ready when they turn from green to a light tan and begin to dry on the plant.
At that point, you can:
- Cut entire seed heads and hang them to dry
- Or let them dry fully in place and collect them as they mature
Once dried, the seeds can be stored whole or ground as needed. They keep well and bring a completely different flavor to the kitchen than the fresh leaves—warm, citrusy, and slightly sweet. You can also plant them again next year.
Bringing It Full Circle
While many gardeners tend to look at the bolting tendency of cilantro as a drawback, I think it's better to accept cilantro for what it is. Yes, it will eventually flower, spelling an end to the harvests from that particular planting. But at the same time, it's giving you the starting material for another one.
And that's the key.
With succession planting, you’re not relying on a single harvest. You’ve got young plants coming up, mature plants ready to cut, and a few going to seed—all at the same time.
It’s a continuous cycle.
And once you get into that rhythm, cilantro stops feeling like a short-lived herb and starts behaving like a steady, reliable part of the garden.
Ready to get growing? Check out our cilantro seeds here. And if you're curious what to grow with it (besides your salsa ingredients) take a peek at our full selection of cilantro companion plants.
