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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 Known 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 Known As:

 Plant Age:
   ~ 6 months - 1 year
 Plant Size:
   ~ 4"-8"
 Pot Size:
   ~ 4.75"H x 4.5"W
   1.50 quarts

2.5 Quart

2.5 Quart
 Also Known As:
   2.5 Quart Pot

 Plant Age:
   ~ 1 - 2 years old
 Plant Size:
   ~ 8"-12"
 Pot Size:
   ~ 6.5"H x 6.5"W
   2.20-2.30 quarts

#1 Pot

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

#2 Pot

#2 Pot
 Also Known As:
   #2 Container
    2 Gallon
 Plant Age:
   ~ 1.5 - 3 years old
 Plant Size:
   ~ 12"-18"
 Pot Size:
   ~ 9.5"H x 9.5"W
   1.19-1.76 gallons

#3 Pot

#3 Pot
 Also Known As:
   #3 Container
    3 Gallon
 Plant Age:
   ~ 2 - 4 years 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 Addicts Guarantee (Included On All Plant Orders)

Plant Addicts always guarantees your plant(s) will arrive happy & healthy. However, plant(s) are being shipped through the mail & sometimes 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 more information on how to care for your new plants, please click on our guide below.

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 a new gardener or an expert. There are many variables outside of anyone's control that can cause a plant to die. Hungry animals, drought, poor soil conditions, over watering, diseases & pests are all good examples of what can cause plants to die. The Plant Addicts Warranty is a 1 year warranty protecting you from all of the unknowns and will replace your plant if something were to happen to it.

The warranty is purchased on a per plant basis and must be purchased at the same time as the plant(s). We will cover 100% of the price of the plant, but the warranty does not cover shipping costs. SImply let us know if your plant has died within 1 year of receiving it and we will get you a new one shipped out as soon as possible (depending on the time of the year and availability). We may ask for photos for documentation purposes, but we try to make the process as easy as possible.

For more information, please click on our page below.

Guarantee and Warranty

Plant Shipping

Below are some factors we consider when determining when to ship the plants depending on the timing of the order.

Winter to Early Spring

We ship only when it's warm enough to plant in your growing zone.
Sometimes plants aren't completely ready to sell and ship in early spring. We will wait until the plants are ready before shipping so you don't get a subpar product.
For Southern plants we will be able to ship much earlier than plants coming from our northern nursery.


If there is extreme heat we may delay shipping for a week or several weeks.
We review what areas the plants are traveling through as well as your location.

Fall into Winter

We’ll ship plants out all the way up to the end of the fall planting season!


Get your order in early to reserve your plants for Spring planting!

Once your plant is shipped you’ll receive an automated email with tracking information. 

Click here for more detailed shipping information.

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