Mint can survive in just water! It is actually possible to grow a healthy mint plant in water alone by taking cuttings from an existing plant and placing them in a jar of clean water. Make sure to change the water every two days and place the jar in an area with lots of sunlight.
In a few weeks, you should start to see roots forming on the stem ends, at which point you can transfer the cuttings into the soil for future growth. With proper care, your mint can survive and thrive!

How to grow mint indoors in water
Growing mint indoors in water is a great way to have fresh herbs year-round without taking up too much space.
To get started, you’ll need a cutting from a healthy mint plant that has some strong stems and new growth. Put the cutting into a jar of clean water, making sure that at least half of the stems are submerged.
Taking care of mint planted in water indoors can be easy if done correctly. Make sure the jar or container has holes in the bottom for proper drainage and is placed in a location with sunlight. Change the water every two days, and trim off any dead growth regularly. In addition, ensure that the container has enough air circulation to prevent your mint from becoming stagnant.
After about two weeks, you should start to see roots forming on the stem ends.
At this point, it’s time to transfer your mint into soil for full growth and enjoy your homegrown herb!
Start by finding a pot with good drainage—you can use either soil or coco coir as the growing medium—and filling it up with soil. Make sure to leave enough room for water around the stem so you don’t damage it during transplanting. Gently remove the cutting from the jar and place it into the container, covering its roots with soil and patting down gently before watering thoroughly.
To take care of mint indoors, there are a few key tips to keep in mind.
First, make sure that the pot you choose for your mint has good drainage. If not, it’s likely that the soil will become too wet and cause root rot or other problems. Make sure the pot you choose has several holes at the bottom for draining excess water.
Second, pick a spot in your home with plenty of sunlight. Mint thrives in bright light and can even tolerate direct sun exposure for short periods of time.
Third, use a well-draining potting mix when planting your mint indoors—potting mixes often contain peat moss or vermiculite to help retain moisture without getting soggy.
Fourth, make sure not to overwater your mint plant; when you do water it, allow the soil to dry out between watering sessions so that it doesn’t get overly saturated. As a rule of thumb, wait until the top inch or two of the soil is dry before watering again.
Finally, use an organic fertilizer every two or three weeks during its growing season to encourage healthy growth and full foliage coverage. A balanced fertilizer such as 10-10-10 (NPK) is best suited for mint plants.

How long does it take for mint to root in water?
It typically takes about two weeks for mint to root in water. Depending on the variety of mint and the ambient temperature, it could take slightly more or less time. Make sure to change the water every two days and place the jar in an area with plenty of sunlight for best results. You should start to see roots forming after a few weeks!
How long can you keep fresh mint in water?
Fresh mint can be kept in water for up to two weeks. To keep the mint fresh and healthy, change the water every two days and make sure it is stored in a place with lots of direct sunlight. After two weeks, the roots should have formed properly and you can transplant your mint into soil or continue keeping them in water.