Seaweed in Washington State – The Korean Seaweed Soup My Husband Keeps Asking For
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| Fresh seaweed harvested in Washington State, ready to become Korean-style seaweed soup, salad, and cold summer soup. |
Sometimes, they carry memory.
Sometimes, they carry care.
And sometimes, one warm bowl of soup can connect two very different worlds.
For me, seaweed is one of those foods.
I grew up in Korea, where seaweed is a very familiar ingredient.
But I never imagined that one day, after moving to the United States, I would harvest fresh seaweed from the cold waters of Washington State and prepare it for my American husband.
Life has a funny way of bringing old memories into new places.
For me, seaweed did exactly that.
The Seaweed Every Korean Knows
In Korea, seaweed is one of the most familiar ingredients in home cooking.
Many Korean families eat Korean seaweed soup on birthdays, and it is also traditionally served after childbirth.
In Korean culture, seaweed soup is deeply connected to postpartum care.
After a baby is born, many Korean mothers eat warm seaweed soup during sanhu jori, the Korean postpartum recovery period.
For generations, this simple soup has been considered gentle, nourishing, and comforting for new mothers.
The warm broth, soft seaweed, and simple ingredients make it a food that feels full of care.
That is also one reason Korean people eat seaweed soup on their birthdays.
A birthday bowl of seaweed soup is not only about celebrating our own life.
It is also a quiet way of remembering the mother who gave birth to us and cared for us when we first came into the world.
But seaweed is not only for special occasions.
It is everyday food too.
We make sweet and tangy seaweed salad with cucumber, peppers, vinegar, soy sauce, sesame oil, a little sugar, and toasted sesame seeds.
The flavor is bright, refreshing, slightly savory, and perfect as a side dish.
In summer, we often make cold seaweed soup.
It is usually made with cucumber, green onion, peppers, and a stronger sweet-sour seasoning. Then cold water and ice are added.
On a hot day, cold seaweed soup is so refreshing.
It cools the body down and wakes up the appetite.
But the most comforting seaweed dish for me will always be Korean seaweed soup.
The Soup My Husband Learned to Love
My husband is American, so Korean seaweed soup was not a childhood food for him.
At first, seaweed soup was unfamiliar.
The color was new.
The texture was new.
The ocean flavor was new.
Everything about it was different from the soups he grew up eating.
So I made it in a way that would feel warm and familiar to him.
I soaked the dried seaweed.
I sautéed it gently with sesame oil.
I added beef.
Then I simmered everything slowly until the soup became savory, rich, and comforting.
Thankfully, he liked it.
Actually, he liked it more than I expected.
After that, whenever he felt tired, he would say, “Seaweed soup, seaweed soup,” and ask me to make it again.
Every time he says that, it makes me smile.
There is something very special about watching someone you love begin to enjoy a food from your culture.
It is more than cooking.
It feels like sharing a part of home.
💚 Winter’s Note
Some foods are introduced slowly.
Some foods become familiar over time.
And some foods quietly become part of a family.
For us, Korean seaweed soup became one of those foods.
A Personal Note About Thyroid Health
There is another reason seaweed became meaningful in our home.
My husband has hypothyroidism, so over the years I have become more careful about the foods I prepare for him.
I am Korean, and I love tofu, stuffed tofu pockets, and many soybean foods.
But after watching how certain foods seemed to affect him, I started paying closer attention.
In the beginning, when we went to picnics or gatherings, I sometimes packed Korean stuffed tofu pockets, fruit, and salad.
They are easy, delicious, and very convenient.
But I noticed that after eating them, my husband often seemed unusually sleepy and tired.
That made me start learning more about food, thyroid health, thyroid medication, and how some foods may affect different people differently.
Since then, I have been more careful with unfermented soy foods in his meals.
This is only our family experience.
It is not medical advice.
Thyroid conditions are different for each person, and seaweed is naturally high in iodine.
For some people, iodine can be helpful when they need it.
For others, too much iodine can be a problem.
So if you have thyroid disease, take thyroid medication, are pregnant, have kidney disease, or have any medical condition, it is always best to talk with your healthcare provider about how much seaweed is right for you.
In our family, I prepare seaweed in a moderate, careful way.
And one of the easiest ways my husband learned to enjoy seaweed was through Korean seaweed soup.
Nutrition & Traditionally Discussed Benefits
Seaweed is naturally rich in minerals and sea vegetable fiber.
In Korean food culture, seaweed has long been treasured as a nourishing ingredient, especially in Korean seaweed soup.
One of the most well-known nutrients in seaweed is iodine.
Iodine is important because the body uses it to make thyroid hormones, which are connected to metabolism, energy, and growth.
Seaweed may also contain minerals such as potassium, calcium, and iron, depending on the type, growing environment, and how it is prepared.
Another important part of seaweed is its dietary fiber.
Brown seaweeds contain fiber compounds such as alginate, which are often discussed in relation to digestion, gut health, and feeling full after eating.
That may be one reason seaweed feels so satisfying even though it is light.
Here is a simple way to understand why seaweed has been loved in Korean kitchens for generations.
Iodine
Supports normal thyroid hormone production when consumed in appropriate amounts.
Dietary Fiber
May help support digestion, gut health, and regular bowel movements.
Alginate
A type of seaweed fiber often discussed for digestive support and satiety.
Potassium
Contributes to normal nutrition, but people with kidney disease may need to limit potassium.
Calcium
Supports normal bone and mineral nutrition.
Iron
Contributes to normal nutrition and helps support the body as part of a balanced diet.
Low-Calorie Food
Seaweed is often enjoyed as a light food that can feel satisfying because of its texture and fiber.
These traditional uses and nutrition discussions do not mean seaweed prevents, treats, or cures disease.
Of course, seaweed is not a miracle food.
No single food can replace a healthy lifestyle, medical care, or a balanced diet.
But when enjoyed in moderation and prepared with care, seaweed can be a beautiful and nourishing ingredient that has earned its place in Korean kitchens for generations.
💚 Winter’s Note
Growing up, I never thought about iodine, alginate, minerals, or dietary fiber when I ate Korean seaweed soup.
To me, it was simply soup.
It was warm.
It was familiar.
It tasted like home.
Now, living in Washington State, I understand even more why traditional foods can be so meaningful.
Sometimes our grandmothers did not explain nutrition with scientific words.
They simply cooked foods they believed would care for the family.
Looking back now, I think there was a lot of wisdom in that simple tradition.
Korean Cooking Tip
When making Korean seaweed soup, many Korean home cooks first gently sauté soaked seaweed with sesame oil or perilla oil before adding water or broth.
This step gives the soup a deeper, nuttier flavor and helps the seaweed taste richer.
For beef seaweed soup, I like to sauté the beef and seaweed together first.
Then I add water and simmer everything slowly.
The longer it simmers, the more comforting the soup becomes.
In many Korean homes, seaweed soup is usually made without green onion.
Some people say this keeps the flavor cleaner and lets the seaweed remain the main taste of the soup.
I also prefer keeping seaweed soup simple, especially when I want to enjoy the gentle ocean flavor of the seaweed itself.
Not everyone in our family loves Korean seaweed soup the same way.
When I used to make it for my father-in-law, he would politely take a few bites and say, “Oh boy…”
He was always kind about it, but I could tell it was not really his favorite soup.
So now, I do not make him eat it anymore. Haha.
That is one thing I have learned while sharing Korean food with my American family.
Some foods become loved over time.
Some foods stay unfamiliar.
And that is okay.
Food should be shared with love, not pressure.
Things to Keep in Mind Before Enjoying Seaweed
Like many healthy foods, seaweed is not the perfect choice for everyone in large amounts.
Because seaweed can be high in iodine, people with thyroid conditions should be careful with how much they eat.
This is especially important for people taking thyroid medication or anyone who has been told by a healthcare provider to monitor iodine intake.
People with kidney disease or people who need to limit potassium should also be cautious.
Seaweed and other sea vegetables may contain potassium, and potassium intake may need to be managed carefully when kidney function is reduced.
Salt is another thing to watch.
Some seaweed products, especially salted seaweed stems or packaged seaweed, can contain a lot of sodium.
When I use salted seaweed, I rinse it well and soak it in water to reduce the saltiness before cooking.
Also, seaweed absorbs minerals from the water where it grows.
That is why it is very important to harvest only from clean, legal, safe areas and to follow official health and harvesting rules.
Who Should Be Careful?
People with thyroid disease
Seaweed can be high in iodine, so portion size matters.
People taking thyroid medication
Ask your healthcare provider how seaweed may fit into your diet.
People with kidney disease
Potassium intake may need to be monitored.
People who need to limit sodium
Salted seaweed should be rinsed and soaked well before cooking.
Pregnant individuals
Ask your healthcare provider before eating large amounts of seaweed regularly.
Anyone new to seaweed
Start with a small amount and see how your body responds.
Discovering Seaweed Harvesting in Washington State
After living in the United States for many years, I learned something that surprised me.
In Washington State, during a short legal season and only in certain approved areas, people can harvest seaweed for personal use.
When I first heard that, I told my husband, “Let’s go.”
And wow.
It was amazing.
The seaweed was so fresh and beautiful.
It was growing right there in the cold Pacific Northwest water.
For me, it felt like discovering Korean food in the ocean of Washington State.
But seaweed harvesting is not easy.
This kind of seaweed grows in the water, so you really need to be prepared.
Hip waders help a lot.
Without them, it is very difficult.
You need to watch the tide.
You need to watch your footing.
You need to be careful on slippery rocks.
And most importantly, you need to know the rules before you harvest.
This is not like picking a few leaves beside a trail.
Ocean harvesting requires extra respect.
Respect for safety.
Respect for the law.
Respect for the ecosystem.
And respect for the water that gives us food.
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| Freshly harvested seaweed rinsed and ready to be blanched, dried, frozen, and preserved for Korean-style seaweed soup or banchan. |
How I Prepared the Fresh Seaweed
After harvesting, the work was not finished.
Actually, that was when the kitchen work began.
We brought the seaweed home.
I rinsed it carefully.
Then I blanched it.
The color changed so beautifully in the hot water.
That fresh ocean brown-green color turned into a brighter, cleaner green.
After blanching, I prepared some for drying and saved some for the freezer.
It was a lot of work.
Rinsing, blanching, cooling, draining, packing, drying, freezing—each step took time.
But I felt happy while doing it.
Why?
Because I kept thinking about the bowls of Korean seaweed soup I could make for my husband.
I also thought about the dear friends I could share it with.
There is joy in harvesting food.
But there is another kind of joy in preparing it for people you love.
That is the part I enjoy most.
Official Washington Seaweed Harvesting Resources
Before harvesting seaweed in Washington State, I always recommend checking the official information first.
Washington State Parks explains where seaweed harvesting is allowed in state parks. According to the current State Parks information, seaweed may be harvested only at Fort Flagler, Fort Ebey, and Fort Worden state parks from April 16 to May 15. All other state parks are closed year-round to seaweed harvesting.
Washington State Parks – Fishing, Shellfishing & Seaweed Harvesting
Washington Department of Natural Resources also explains important seaweed harvesting rules, including using a knife or scissors, not harvesting for sale or barter, and following the 10-pound wet weight daily limit per person.
Washington Department of Natural Resources – Seaweed Harvesting
For licensing, Washington Department of Fish & Wildlife provides fishing and shellfish license information. A Shellfish/Seaweed license is listed as one of the license options for recreational harvesting.
WDFW Shellfish/Seaweed License Information
Before going out, it is also important to check current beach safety information. Washington State Department of Health provides shellfish beach closure updates, including the Recreational Shellfish Safety Map, county beach status, and biotoxin closure information.
Washington Department of Health Shellfish Beach Closures
Rules, seasons, beach status, and safety conditions can change, so always check the official pages before harvesting.
A happy foraging day should never become a bad memory because we ignored the rules.
When we follow the law, respect the ocean, and harvest gently, the experience becomes even more meaningful.
Responsible Seaweed Harvesting Reminder
Use a knife or scissors.
Do not pull the whole plant from the base.
Do not damage the holdfast.
Harvest only what you are allowed to take.
Check the legal limit.
Check the open season.
Check the open beach status.
Check the tide and weather.
Never harvest from polluted areas, marinas, sewage outfalls, industrial areas, or anywhere contamination may be present.
And always follow current official rules before you go.
Frequently Asked Questions
What kind of seaweed is used in Korean seaweed soup?
Korean seaweed soup is traditionally made with a soft brown seaweed that becomes tender after soaking and cooking.
It has a gentle ocean flavor and is widely used in Korean home cooking.
How do Koreans eat seaweed?
Koreans commonly eat seaweed in soup, sweet and sour salad, cold soup, and side dishes.
What does Korean seaweed soup taste like?
It has a warm, savory, gentle ocean flavor.
When made with beef, it becomes richer and more comforting.
Can you make Korean seaweed soup without beef?
Yes.
Korean seaweed soup can be made without meat.
Some people prefer a simple version so they can enjoy the seaweed flavor itself.
Can you make Korean seaweed soup with seafood?
Yes.
It can be made with clams, sea urchin, mussels, or other seafood depending on the family recipe.
Is seaweed good for thyroid health?
Seaweed contains iodine, which the body uses to make thyroid hormones.
However, too much iodine can also be a problem for some people, especially those with thyroid disease.
Anyone with a thyroid condition should ask their healthcare provider about the right amount.
Should people with kidney disease be careful with seaweed?
Yes.
People with kidney disease or potassium restrictions should ask their healthcare provider or dietitian before eating large amounts of seaweed regularly.
Can I harvest seaweed anywhere in Washington State?
No.
Seaweed harvesting is regulated.
You must check the current official rules, license requirements, open season, approved locations, ownership, limits, and safety closures before harvesting.
Do you need hip waders to harvest seaweed?
In many places, yes, hip waders are very helpful because seaweed grows in the water.
Safety is very important because rocks can be slippery and tides can change.
More Than Just Seaweed
Before moving to America, I never imagined that I would one day harvest seaweed in Washington State.
I never imagined that the same kind of food I grew up eating in Korea would become part of my life here in the Pacific Northwest.
But that is one of the beautiful things about wild harvest life.
Sometimes nature introduces us to something completely new.
Other times, it reconnects us with something we have loved for a lifetime.
For me, seaweed does both.
It connects me to Korea.
It connects me to my husband.
It connects me to the ocean.
And it reminds me that food is not only about nutrition.
Food is memory.
Food is care.
Food is culture.
Food is love.
Have You Ever Tried Korean Seaweed Soup?
Now I would love to hear from you.
Have you ever tried Korean seaweed soup?
Have you ever eaten seaweed salad?
Have you ever harvested seaweed where you live?
Or is there a traditional food from your childhood that still makes you feel at home?
Please share your story in the comments below.
One of my favorite parts of writing this blog is hearing how people around the world connect with nature, food, and family memories.
Want to See This Seaweed Harvest?
Photos tell part of the story.
Video brings the experience to life.
If you would like to see our Washington State seaweed harvest, I shared the experience in a YouTube Short.
🎥 Click here to watch our Washington State seaweed harvesting video.
I also shared another video showing how I blanched and prepared the fresh seaweed after bringing it home.
🎥 Click here to watch how I blanch and prepare fresh seaweed.
Join Me on YouTube
If you enjoy wild edible plants, mushrooms, fish, oysters, clams, Korean-style cooking, and seasonal foraging and wild harvest adventures in the Pacific Northwest, I would love to have you join me on my YouTube channel.
You May Also Enjoy
If you enjoyed reading about seaweed, you may also enjoy learning more about my Wild Harvest Life story and other wild foods that connect Korean food memories with life in the Pacific Northwest.
🌿 Read next: Welcome to Wild Harvest Life
🌿 Read next: Red Huckleberries in the Pacific Northwest – A Tiny Forest Berry Full of Memory
Foraging Safety
⚠️ Foraging Safety: Never eat any wild plant, seaweed, mushroom, shellfish, or wild food unless you are 100% certain of its identification and safety.
Avoid harvesting near roads, heavy traffic, sprayed areas, polluted locations, marinas, sewage outfalls, industrial areas, or anywhere contamination may be present.
Harvest only from clean environments.
If you are harvesting anywhere other than your own private property, always check and follow local harvesting laws, regulations, seasons, limits, health closures, and land-use rules.
For seaweed harvesting, always check the official state rules, license requirements, open areas, beach safety status, tides, and current regulations before you go.
Health Reminder
Seaweed can be high in iodine.
If you have thyroid disease, take thyroid medication, have kidney disease, need to limit potassium or sodium, are pregnant, or have any medical condition, please talk with your healthcare provider before eating large amounts of seaweed regularly.
Thank you from Wild Harvest Life PNW
Thank you so much for spending time with me here at Wild Harvest Life PNW.
I truly appreciate every visit, every comment, and every story you share.
I hope this little seaweed story encourages you to look at the ocean, the forest, and the foods around you with fresh eyes.
Sometimes the greatest treasures are not far away.
Sometimes they are waiting in the cold Pacific Northwest water.
And sometimes, they become a warm bowl of soup for someone you love.
Stay tuned for more Wild Harvest Life adventures! 🌿
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