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You can harvest coriander seeds from your cilantro plant by letting the plant bolt, flower, and then form seed heads that turn brown and dry.
Once those seed heads are dry, you snip them off, bag them, and shake the seeds loose, which gives you a fresh supply of coriander seeds for cooking or replanting.
It’s one of those gardening tasks that feels almost magical because you’re getting two spices from one plant: cilantro leaves and coriander seeds.
If you’ve ever wondered how to harvest coriander seeds from a cilantro plant without ruining the plant or ending up with moldy seeds, this guide will walk you through the whole process step by step.
Let’s get into it so you can harvest coriander seeds like a pro.
How to Harvest Coriander Seeds from Cilantro Plant
Learning how to harvest coriander seeds from a cilantro plant starts with understanding the plant’s natural life cycle.
Cilantro and coriander are actually the same plant, just at different stages.
Cilantro refers to the fresh leaves, while coriander refers to the seeds that form after the plant flowers.
So when you harvest coriander seeds, you’re simply collecting the mature seeds from a cilantro plant that has bolted.
Here’s the basic process you’ll follow to harvest coriander seeds successfully:
1. Let Your Cilantro Bolt and Flower
The first step in how to harvest coriander seeds from a cilantro plant is to let it bolt, which means allowing it to send up a tall flower stalk.
Bolting happens naturally when the weather warms up, or you can encourage it by planting cilantro in late spring or early summer.
Once the plant bolts, it produces small white or pinkish flowers that bees and other pollinators love.
Don’t cut those flowers off if you want coriander seeds.
Those flowers are the beginning of your coriander seed harvest.
2. Wait for the Seeds to Form and Turn Brown
After the flowers fade, tiny green seeds start to develop in clusters at the top of the plant.
At this stage, the seeds are not ready to harvest coriander seeds yet.
You need to wait until those green seeds turn a light brown or tan color.
This color change is your signal that the coriander seeds are mature and ready.
If you pick them too early, they won’t dry properly, and you’ll end up with seeds that taste grassy instead of citrusy and warm.
3. Watch for the Right Time to Harvest Coriander Seeds
Timing is everything when you harvest coriander seeds from a cilantro plant.
The best moment is when most of the seeds on the plant have turned brown but haven’t started falling off yet.
If you wait too long, the seed heads will shatter, and your coriander seeds will drop to the ground.
A good trick is to check the seed heads every day once they start turning brown.
When you gently rub a seed head between your fingers and the seeds come loose easily, it’s time to harvest coriander seeds.
4. Cut the Seed Heads Off the Plant
To harvest coriander seeds, use a pair of clean scissors or pruning shears to snip off the brown seed heads.
Leave a few inches of stem attached so you have something to hold onto.
You can cut the whole plant down if most of the seed heads are ready, or just take the ripe ones and let the rest mature.
Place the cut seed heads into a paper bag or a shallow cardboard box as you go.
This keeps the seeds contained and prevents them from scattering everywhere while you work.
How to Dry and Store Coriander Seeds After Harvest
Once you’ve cut your seed heads, the next step in how to harvest coriander seeds from a cilantro plant is drying them properly.
If you skip this step, your coriander seeds can mold, and all your hard work will be wasted.
Here’s how to dry and store them so they last for months:
1. Dry the Seed Heads in a Warm, Airy Spot
Spread the cut seed heads out on a screen, a baking sheet, or a clean cloth.
Put them in a warm, dry place with good air circulation, away from direct sunlight.
A garage, a covered porch, or a sunny windowsill works well.
Let them dry for about one to two weeks.
The seeds are fully dry when they feel hard and rattle inside the seed head.
2. Thresh the Seeds from the Seed Heads
After the seed heads are completely dry, it’s time to separate the coriander seeds from the chaff.
Put the dried seed heads into a paper bag or a large bowl.
Then rub them between your hands or gently crush them to release the seeds.
You can also shake the bag vigorously to help the seeds fall out.
Pick out any large stems or leaves and discard them.
3. Winnow Away the Chaff
To clean your coriander seeds, pour them from one bowl to another in front of a fan or a gentle breeze.
The lighter chaff will blow away, while the heavier coriander seeds fall into the bowl below.
Repeat this a few times until your seeds are clean.
Or you can use a fine-mesh strainer to sift out the smaller bits.
4. Store Coriander Seeds in an Airtight Container
Once your coriander seeds are clean and completely dry, store them in an airtight glass jar or a sealed plastic container.
Keep the jar in a cool, dark, dry place like a pantry or a spice cabinet.
Label the jar with the date so you know how fresh your coriander seeds are.
They’ll stay flavorful for about one to two years if stored properly.
And yes, you can grind them fresh whenever you need ground coriander for your recipes.
Tips for Harvesting Coriander Seeds from Cilantro Plant
If you want to harvest coriander seeds from a cilantro plant successfully, here are a few extra tips to keep in mind:
1. Plant Cilantro in Succession for a Steady Supply
Cilantro bolts quickly in hot weather, so plant a new batch every two to three weeks.
That way, you always have some cilantro for leaves and some for coriander seeds.
2. Don’t Let the Seeds Get Wet
Moisture is the enemy of coriander seeds.
Always harvest on a dry day, and never wash the seed heads before drying.
If it rains while your seeds are drying, move them indoors immediately.
3. Save Some Seeds for Planting
Coriander seeds are also the seeds you plant to grow new cilantro.
So set aside a few of your best seeds to replant next season.
You’ll save money and get a head start on your next cilantro crop.
So, How to Harvest Coriander Seeds from Cilantro Plant?
You harvest coriander seeds from a cilantro plant by letting it bolt, flower, and form brown seed heads, then cutting those heads off, drying them, and shaking the seeds loose.
It’s a simple process that gives you a free spice supply and seeds for next year’s garden.
Just remember to wait until the seeds are brown and dry, dry them thoroughly, and store them in an airtight jar.
Once you know how to harvest coriander seeds from a cilantro plant, you’ll never look at bolting cilantro as a problem again.
Instead, you’ll see it as the start of your next coriander harvest.