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A pothos plant can grow underwater, though the experience is different from growing it in soil.
If you’ve been wondering, can a pothos plant grow underwater in a fish tank or a decorative vase, the answer is yes with the right care.
Many plant owners successfully keep a pothos plant underwater for months or even years.
The pothos plant can grow underwater, but it adapts by developing specialized water roots and smaller leaves.
This adaptation helps the plant survive and even thrive in an aquatic environment.
In this post, we will explore whether a pothos plant can grow underwater and how to make it happen.
Let’s look at what you need to know about growing pothos underwater.
Can Pothos Plants Grow Underwater?
Yes, a pothos plant can grow underwater, and here is how the plant adjusts to life in water.
When you place a pothos plant underwater, it shifts into a different growth mode.
This natural shift allows the pothos plant to grow underwater by changing its root and leaf structure.
1. Water Roots Replace Soil Roots
A pothos plant grown underwater develops water roots instead of thick soil roots.
Water roots are thin, white, and designed to absorb oxygen and nutrients directly from the water.
If you transition a pothos plant from soil to water, the old roots may rot and need trimming.
New water roots will sprout from the nodes within a week or two.
This root adaptation is the main reason a pothos plant can grow underwater successfully.
2. Leaf Changes When Growing Pothos Underwater
A pothos plant underwater produces leaves that look different from soil-grown leaves.
These aquatic leaves are smaller, thinner, and more elongated than usual.
The variegation patterns may become less pronounced or fade entirely.
This change happens because the plant adjusts its chlorophyll to the underwater light levels.
Even with these changes, a pothos plant can grow underwater and remain healthy.
3. Growth Rate of Pothos Underwater
A pothos plant can grow underwater at a slower pace than in soil.
The reason is that water contains less carbon dioxide than air.
Plants need carbon dioxide for photosynthesis, so growth slows down.
A pothos underwater may produce one new leaf every few weeks.
This slower growth is normal and not a sign of poor health.
With patience, you can enjoy a thriving pothos plant underwater for a long time.
4. Longevity of Pothos Grown Underwater
A pothos plant can grow underwater for many months if conditions are right.
Some owners keep their pothos underwater in aquariums for over a year.
The plant will eventually outgrow its container and need trimming or transition to soil.
But for a long time, a pothos plant can grow underwater and stay green and vibrant.
How to Successfully Grow a Pothos Plant Underwater
If you want your pothos plant to grow underwater, follow these simple setup steps.
The right environment makes all the difference for pothos underwater.
1. Choose the Right Container
Use a clear glass or plastic container to allow light to reach the leaves.
A wide-mouthed jar or vase gives the roots room to spread out.
Make sure the container is thoroughly cleaned before adding your pothos underwater.
A pothos plant can grow underwater in a fish tank, a bottle, or a large drinking glass.
2. Use Clean Water for Pothos Underwater
Tap water contains chlorine and chloramine that can harm a pothos plant underwater.
Let tap water sit out for 24 hours before using it to let the chlorine evaporate.
Filtered or distilled water is even better for your pothos underwater.
Change the water every one to two weeks to prevent bacteria and algae buildup.
Clean water is essential for a pothos plant to grow underwater without problems.
3. Provide Proper Lighting
A pothos plant can grow underwater, but it still needs bright indirect light.
Place the container near a window that gets morning or late afternoon sun.
Avoid direct sunlight as it can heat the water and cause algae to explode.
If natural light is low, use a grow light set for 8 to 10 hours a day.
Good lighting helps your pothos underwater produce energy for growth.
4. Add Nutrients for Healthy Growth
Water alone does not provide enough nutrients for a pothos plant underwater.
Add a few drops of liquid aquarium plant fertilizer to the water once a month.
If your pothos grows underwater in a fish tank, fish waste provides natural fertilizer.
Without nutrients, the leaves may turn pale or yellow over time.
A little fertilizer goes a long way for a pothos plant grown underwater.
Common Problems When Growing Pothos Underwater
Even though a pothos plant can grow underwater, some issues can come up.
Here are the most common problems and how to solve them.
1. Root Rot in Pothos Underwater
Root rot happens when water becomes stagnant or lacks oxygen.
If the roots turn brown and mushy, trim them right away.
Change the water and clean the container to stop the rot from spreading.
An aquarium air stone can add oxygen and prevent root rot in pothos underwater.
2. Algae Growth on Glass and Roots
Algae can coat the container walls and roots of your pothos plant underwater.
Too much light or excess nutrients in the water encourage algae growth.
Scrub the container during water changes with a soft brush.
Reduce light exposure if algae keeps coming back.
A few algae-eating snails can help keep your pothos underwater setup clean.
3. Yellow Leaves on Pothos Underwater
Yellow leaves often mean your pothos plant underwater needs more nutrients.
Add a balanced liquid fertilizer at half strength to solve this issue.
Yellow leaves can also indicate that the water needs changing more often.
Check that your pothos underwater is not getting too much direct light.
Trim off any yellow leaves to keep the plant looking fresh.
So, Can a Pothos Plant Grow Underwater?
A pothos plant can grow underwater, and many people enjoy this unique way of keeping houseplants.
The key is understanding that the plant will adapt by producing water roots and smaller leaves.
With clean water, proper lighting, and occasional fertilizer, your pothos underwater will stay healthy.
A pothos plant can grow underwater in a fish tank, a vase, or any clear container you choose.
Whether you are a beginner or an experienced plant parent, a pothos plant can grow underwater and bring life to your home.
So go ahead and give growing pothos underwater a try with your own plant today.