Marimo Ball

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  • Low Maintenance
  • Light Preference/Tolerated (Medium Light, Low Light)
  • Aquatic Watering Needs
  • Mature Height 8-12 inches
  • Pet Safe

The stunning, bright, velvety-green orb is neither a moss nor a plant but is a naturally occurring rare form of algae that grows spherically. They are found in a few lakes throughout the world, located in Iceland, Japan, Ireland, Scotland, and Estonia. They have been known to live for over 200 years so are handed down as family heirlooms.  

Best Locations For Growing Marimo Ball

To provide the ideal environment for your Marimo Ball, find a location that receives medium, indirect light. Because their native environment occurs in cold lakes, they do not require heated water. They prefer cool environments, so place them away from central heat vents or radiators. 

Marimo Ball Sunlight Requirements

Because Marimo Ball grows naturally at the bottom of lakes, they do not require special or high-intensity light. Regular household lighting or indirect natural lighting from windows is enough light for the Marimo to photosynthesize. Just be sure to keep them out of direct sunlight or away from higher-intensity LED lights because this will cause brown spots.  

Marimo Ball Care

Every time you do a water change in your aquarium, gently roll the Marimo Ball in your hands to maintain its round shape and ensure that all parts of the sphere get access to light. If you notice your Marimo Ball is starting to collect debris, take it out of the tank, remove any undesirable algae, and gently swish it in a bucket of aquarium water to clean. You can propagate Marimo Ball simply by removing it from the tank, squeezing out excess water, and cutting it in half with a clean pair of scissors or a sharp knife. Roll the new clumps in your hands to form new spheres. Aquascapers get creative and branch out from the sphere form, using them as lush green mats on rock surfaces, the aquarium floor, and other hardscaping elements in the aquarium. 

Watering Marimo Ball

Marimo Ball can live in tap water aquariums, but they will do best and will remain cleaner in reverse-osmosis water or filtered water. Water changes are important to prevent natural dirt or waste build-up on your Marimo Ball. The frequency of water changes is dependent on the environment. If your Marimo Ball lives by itself, a good general rule of thumb is a 50% water change every couple of weeks. Marimo Balls naturally grow in cooler water and prefer temperatures below 75 degrees. 

Feeding Marimo Ball

No fertilization is necessary, although if you notice your Marimo Ball developing small brown spots, it’s recommended to add a pinch of ocean salt to the container.

Marimo Ball Information

Light Exposure: Medium Light, Low Light
Care Requirements: Easy
Watering Requirements: can survive without water if kept in plastic or a closed jar for several days
Pet Friendly: Yes
Kid Friendly: Yes
Air Purifier: Moderate
Habit: Mounded
Growth Rate: Slow
Mature Height: 8-12 inches
Mature Spread: 8-12 inches
Flowering: No
Flower Color(s): None
Flower Shade/Description: Grown for Foliage
Fragrant: No
Foliage Type:
Foliage Color(s): Green
Foliage Description: Green
Temperature: Below 40 °F (Below 4 )
Humidity: Average (40% - 60%)
Common Name: Marimo Ball
Other Name(s): Marimo Balls
Scientific Name: Aegagropila linnaei
Plant Type: House Plant

Container Sizes

Please Note: The pictures below are to give a general representation of the different container sizes. The actual size/ages of plants are estimates and will vary based on; type of plant, time of year, last pruning & many other factors.

4.5 Pot

4.5" Pot
 Also Know As:
   4.5" Container

 Plant Age:
   ~ 6 months
 Plant Size:
   ~ 3"-6"
 Pot Size:
   ~ 4.5"H x 3.75"W
   1.42 quarts

Quart Pot

Quart Pot
 Also Know As:

 Plant Age:
   ~ 1 year old
 Plant Size:
   ~ 4"-8"
 Pot Size:
   ~ 4.75"H x 4.5"W
   1.50 quarts

2.5 Quart

2.5 Quart
 Also Know As:
   2.5 Quart Pot

 Plant Age:
   ~ 1.5 year old
 Plant Size:
   ~ 8"-12"
 Pot Size:
   ~ 6.5"H x 6.5"W
   2.20-2.30 quarts

#1 Pot

#1 Pot
 Also Know As:
   #1 Container
    1 Gallon
 Plant Age:
   ~ 2 year old
 Plant Size:
   ~ 10"-14"
 Pot Size:
   ~ 7"H x 7.75"W
   2.26-3.73 quarts

#2 Pot

#2 Pot
 Also Know As:
   #2 Container
    2 Gallon
 Plant Age:
   ~ 2-3 year old
 Plant Size:
   ~ 12"-18"
 Pot Size:
   ~ 9.5"H x 9.5"W
   1.19-1.76 gallons

#3 Pot

#3 Pot
 Also Know As:
   #3 Container
    3 Gallon
 Plant Age:
   ~ 3-4 year old
 Plant Size:
   ~ 12"-30"
 Pot Size:
   ~9.5"H x 11"W
   2.32-2.76 gallons

For more detailed information, please click here.

Plant Addict Guarantee (Included On All Plant Orders)

Plant Addicts guarantees your plant(s) will arrive happy and healthy, but the plant(s) are being shipped through the mail and accidents happen. If the plant is dead, has dried out roots or the incorrect item was shipped just notify Plant Addicts within 3 days upon delivery. We may ask for pictures but will try to make it as easy as possible for you. Please note plant(s) with damaged branches or wilted leaves will not qualify for this guarantee. Plants are very resilient and will rebound quickly when cared for correctly.

For information on how to care for you new plant please check out our guide. Guide: How to Care for Your New Plant(s)

Plant Addicts Warranty - 1 Year (Extra Purchase Required)

We encourage all plant lovers to purchase the Plant Addicts Warranty whether you’re new or an expert. There are many variables outside our control and yours that can cause the demise of your plant(s). Examples would be hungry animals, drought, poor soil conditions, over watering, disease, insects & many other factors. The Plant Addicts Warranty is a 1 year warranty protecting you from all the unknowns and will replace your plant if it moves on to the plant afterlife.

The warranty is purchased on a per plant basis and must be purchased at the same time as the plant purchase. We will cover 100% of the price of the plant but the warranty does not cover shipping cost. Simply let us know if your plant has died within one year of receiving it and we’ll get you a new one shipped out. We may ask for photos for documentation purposes but again we’ll try to make it as easy as possible.

For more information, please go to our Shipping & Returns page at the bottom of the website.

Guide: How to Care for Your New Plant(s)

Planter Shipping

Standard Colors: 2-3 business days

Special Order Colors: 8 weeks - this is due to the planter being custom made with the color(s) of your choice

Please Note: On special orders there can not be any cancellations

Plant Shipping

Time of Order:

Summer Shipping

  • If there is extreme heat we’ll delay shipping.  
    • We’ll have to review what areas the plants are traveling through along with your location

Once your plant is shipped you’ll receive an email with tracking information. Depending on the above criteria we’ll ship your plant(s) towards beginning of the following week from your order. We put together this helpful guide of what to do when you receive your plants in the mail.

It is important to know that all of our plants are clearly labeled for which growing zones the plant can survive in. The plants are thoroughly trialed and tested in every growing zone before we state the plant can grow in a zone. Again, our #1 priority is to ship the plants to you healthy and ready to thrive in your location. So we will do everything in our power to do so.