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You can harvest seeds from cilantro by letting a few plants bolt and go to seed, then collecting those seeds once they turn brown and dry.
If you’ve ever wondered how to harvest seeds from cilantro, the good news is that it’s one of the easiest seed-saving projects you can take on.
Cilantro seeds are actually coriander, so you get two harvests from the same plant.
You can harvest seeds from cilantro whether you planted it in a garden bed, a raised bed, or a humble pot on your windowsill.
In this post, we’ll walk through exactly when and how to harvest seeds from cilantro so you can save money and grow more of this herb next season.
Let’s dig in.
How to Harvest Seeds From Cilantro: The Basics
Learning how to harvest seeds from cilantro starts with understanding the plant’s natural life cycle.
Cilantro is a cool-season annual, which means it sprints through its life stages quickly.
When the weather warms up, the plant stops producing leaves and sends up a tall flower stalk instead.
This process is called bolting, and it’s completely normal.
Those little white flowers eventually turn into green seed pods, and those pods are what you’ll harvest.
You can harvest seeds from cilantro plants grown in spring, fall, or even winter in mild climates.
The trick is patience, because timing matters more than anything else.
1. Let Your Cilantro Bolt Naturally
The first step in how to harvest seeds from cilantro is simply letting your plant bolt.
Don’t fight it by pinching off flower stalks, because that’s the whole point here.
Once your cilantro bolts, it produces umbels of tiny white or pink flowers.
Those flowers attract pollinators and slowly transform into clusters of green seeds.
If you want to harvest seeds from cilantro, this stage is non-negotiable.
2. Watch for the Seeds to Turn Brown
Knowing when to harvest seeds from cilantro is all about color.
Green seeds aren’t ready yet, and they won’t germinate well if you pick them too early.
You want to harvest seeds from cilantro only after the pods shift from green to a light tan or brown.
At this point, the seeds inside are fully mature and viable.
If you wait too long, though, the pods will shatter and drop seeds onto the soil.
3. Check the Seeds Every Few Days
Cilantro seeds don’t ripen all at once, which complicates things a bit.
Some umbels mature faster than others, even on the same plant.
So if you plan to harvest seeds from cilantro, check your plants every two or three days.
You can harvest seeds from cilantro in stages as each cluster dries.
This staggered approach keeps you from losing seeds to the wind or to birds.
How to Collect and Store Cilantro Seeds
Once your seeds are brown and dry, it’s time to actually gather them.
The method you use to harvest seeds from cilantro can make the difference between a big harvest and a tiny one.
Here’s how to do it without making a mess.
1. Snip the Seed Heads Into a Paper Bag
The cleanest way to harvest seeds from cilantro is the paper bag method.
Hold a brown paper bag under the seed head and snip the stem with scissors.
Let the whole cluster fall into the bag, then fold the top closed.
This way, any seeds that shake loose stay trapped in the bag instead of scattering everywhere.
You can harvest seeds from cilantro this way even if some pods aren’t fully dry yet.
2. Let the Bag Sit in a Dry Spot
Leave your paper bag in a warm, dry room for about a week or two.
This gives the remaining green pods time to finish drying out.
Shake the bag gently every couple of days to help seeds separate from the chaff.
After a week or two, you’ll hear the seeds rattling around, which means they’re ready.
3. Separate the Seeds From the Chaff
Now it’s time to clean what you’ve gathered.
Pour the contents of your bag into a bowl or onto a baking sheet.
Pick out the big stems and dried flower bits with your fingers.
Then gently blow across the bowl so the lighter chaff flies away while the heavier seeds stay put.
You can also use a fine-mesh strainer to sift out the smaller debris.
4. Store the Seeds in a Cool, Dark Place
Proper storage matters just as much as the harvest itself.
Place your dried cilantro seeds in a small paper envelope or glass jar.
Label it with the date and the variety so you know what you’re planting next year.
Keep the container in a cool, dark, dry spot like a pantry shelf or a sealed drawer.
Stored this way, your cilantro seeds will stay viable for two to three years.
Tips for a Better Cilantro Seed Harvest
A few small habits will make your next harvest even easier.
First, plant extra cilantro specifically for seed production so you don’t sacrifice your leaf harvest.
Second, avoid harvesting seeds on a windy day, since dry pods can scatter in seconds.
Third, never harvest seeds from cilantro that’s been sprayed with chemicals you wouldn’t want in your garden next season.
And if you’re growing cilantro in containers, move the pots to a sheltered spot once the flowers fade.
That single move can protect your crop from rain that would otherwise ruin the drying process.
Finally, remember that the seeds you harvest are the same coriander seeds sold in grocery stores.
So you can grind a few for cooking and save the rest for planting.
So, How Do You Harvest Seeds From Cilantro?
You harvest seeds from cilantro by letting the plant bolt, waiting for the seed pods to turn brown and dry, then collecting them in a paper bag before storing them in a cool, dark spot.
It’s a simple process that rewards you with free seeds for next season.
Whether you’re a beginner or a seasoned gardener, learning how to harvest seeds from cilantro is a skill worth having.
Give it a try with your next patch, and you’ll never need to buy coriander seeds again.