How Do You Grow Dulse?

Written by: Lars Nyman

Growing Dulse

Growing Dulse

Dulse is a fast-growing, salt-tolerant plant that thrives in coastal zones. It grows abundantly in saline water and is highly valued for its high nutritional value, high digestibility, and trace minerals found within the leaves. Dulse is also an excellent source of calcium, iron, vitamin A, and vitamins K, C, and B6. Dulse is an annual herbaceous plant that produces thick leaf blades that grow upright from the stalk of the plant. This annual nature allows it to grow on sandy shores or dune areas where other plants would not be able to grow. This article will briefly explain how you can grow a dulse at home as well as some tips for taking care of your dulse once it’s established at home.

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Cheatsheet: Growing Dulse

1. Optimal Conditions 🌊

🌡️ Cool water temperatures: 50-68ºF

🌬️ Moderate to strong light: 12-16 hours/day

🔸 Saline water: 20-35 ppt

2. Propagation 🌱

  • 🌱 Start with dulse seedlings or spores
  • 🌊 Submerge in seawater to establish
  • 🌎 Plant in rocky intertidal areas or tanks

3. Cultivation Tips 🌿

  • 🧂 Regularly fertilize with seaweed-based nutrients
  • 💦 Maintain constant water flow for nutrient distribution
  • ⏰ Harvest when vivid red color is reached

4. Health Benefits 🌿🌊

💪 Omega-3 rich: 6x more than spinach

🧠 Boosts brain health & cognitive function

⚖️ Contains essential vitamins and minerals

5. Sustainable & Self-sufficient 🌍

⚡️ Requires no added energy for growth

🚫 No need for pesticides or artificial fertilizers

🌿 Can easily be grown at home

How To Grow Dulse At Home

Dulse is a fast-growing, salt-tolerant plant that thrives in coastal zones. It grows abundantly in saline water and is highly valued for its high nutritional value, high digestibility, and trace minerals found within the leaves.

Dulse is an excellent source of calcium, iron, vitamin A, and vitamins K, C, and B6. To grow a dulse at home, you will need a sandy area in your backyard, near a coastal zone, or near a fountain where your dulse can get lots of water throughout the day.

Once you have your sandy area ready, you will need to prepare your planting area by digging a hole that is about twice the diameter of the dulse seed you are planting.

Next, you will need to sow the seeds in the prepared planting area and cover them with about a half-inch of soil. you can sow the seeds in rows or in a single layer. it is best to sow the seeds in early to mid-august before the temperatures start dropping in autumn (october to november). the optimal temperature for germination is between 68 and 75 degrees fahrenheit with 60 percent humidity.

What You Need To Grow Dulse


You will need containers to house your dulse plants. you can use a small pot filled with soil, a small bucket with holes in the bottom, or a large plastic container with holes drilled in it. the size of your container should be large enough to house the stalk of the dulse plant and the roots.

Potting soil

Potting soil should be free of additives, fungicides, and fertilizers. it should also have added nutrients such as nutrients that promote the growth of the plant.


You will need to buy seeds to start your dulse plants. You can search online for the best dulse seeds for home cultivation.

Watering container

You will need to water your dulse plants daily. you can use a watering can with a water filter or a water bottle with a filter.

Planting Dulse Seeds

Once your seeds have been purchased and are at room temperature, it is time to plant them. You can sow the dulse seeds in a pot filled with soil or in a small container. Make sure that the soil is sandy, not clayey, and not too wet or too dry. The ideal soil pH is 6 to 8. Once you have prepared the planting area, sow the dulse seeds evenly in the soil using potting soil that is free of additives, fertilizers, and fungicides. Cover the seeds with soil and water the soil slightly. You should water the soil daily until the seeds germinate. The water that you use should be rainwater or filtered water, not tap water. You can also use a water purification system to make sure that what you are watering your dulse with is not harmful to the plants.

How To Grow Dulse Indoors

The best way to grow dulse indoors is with a propagator. Dulse plants can grow and thrive in propagator conditions where other plants struggle to survive. Propagators are typically glass containers with heating elements that keep the temperature of the propagator between 70 and 80 degrees Fahrenheit. The ideal humidity for dulse in propagators is around 40 percent. For propagating dulse indoors, you will need to collect the seeds, sow them in containers filled with soil, and then provide the propagator with light and water the soil daily. Once the seeds have germinated, you will need to provide your dulse plants with the same conditions as the propagator. The ideal temperature for dulse indoors is between 70 and 80 degrees Fahrenheit, with about 40 to 60 percent humidity.

Tips For Taking Care Of Dulse Plant

  • Ensure that the potting soil that you use for your dulse contains trace minerals such as potassium, zinc, iron, and calcium.
  • Pick fruits from your dulse plants once a week. You can eat the fruits or dry them and use them to feed your chickens or ducks.
  • Select a sunny location for your dulse plant.
  • Mulch the soil around your dulse plant with organic matter such as dry leaves once a month to prevent the soil around the plant from becoming too compacted.
  • Trim your dulse plant regularly to ensure that it doesn’t grow too tall. You can also prune the stalk of your dulse plant to encourage bushiness.
  • Prune your dulse plants annually to ensure that they don’t get too tall.
  • Harvest your dulse plants once every month to a month and a half.
  • Harvest your dulse plants when the leaves are yellow or aged and have a dry and crispy texture.
  • Pick the dulse leaves when they are young and tender before they age and become tough.



What are the ideal growing conditions for Dulse?

The ideal growing conditions for Dulse are cool temperatures, moderate sunlight, and seawater rich in nutrients.

Can Dulse be grown in a garden?

Yes, Dulse can be grown in a garden as long as the garden is in close proximity to the ocean or a saltwater source.

Can Dulse be grown in a pot?

It is possible to grow Dulse in a pot if you can provide it with fresh seawater and proper nutrient-rich soil.

What type of soil is best for growing Dulse?

The best soil for growing Dulse is sandy or loamy soil that is well-draining and has a slightly acidic pH.

How often should Dulse be watered?

Dulse should be watered regularly to keep the soil moist, but not waterlogged, as it requires constant access to seawater.

How long does it take for Dulse to grow?

Dulse can take approximately four to eight weeks to grow, depending on the environmental conditions and the variety of Dulse being grown.

What pests or diseases affect Dulse?

While not highly susceptible to pests or diseases, Dulse can be affected by slugs, snails, and bacterial rot. Ensuring proper drainage and removing any affected plants can prevent these issues.

When is the best time to harvest Dulse?

The best time to harvest Dulse is when it reaches its peak color and has a tender texture. This typically occurs in the late spring or early summer.

How should Dulse be harvested?

To harvest Dulse, gently cut the fronds close to the base of the plant using a sharp knife or scissors, taking care not to disturb the root system.

How should Dulse be stored after harvesting?

Dulse should be stored in a cool, dry place, away from direct sunlight. It can also be stored in an airtight container or sealed bag to maintain its freshness.

How can Dulse be used in cooking?

Dulse can be used in cooking by adding it to salads, soups, stir-fries, and even baked goods for a unique umami flavor and nutritional boost.

Dulse is a salt-tolerant plant that thrives in coastal zones. It is also a great source of minerals such as iron, calcium, and vitamins like A and B6. Dulse is easy to grow and is a great source of nutrition for humans and animals. This article will briefly explain how you can grow dulse at home as well as some tips for taking care of your dillescence once it’s established at home.

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