How to Grow Mint Indoors in Water

Disclosure: As Amazon Associates we earn from qualifying purchases. When you buy through links on our site, we may earn an affiliate commission at no additional cost to you.

Once you know how to grow mint indoors in water, you can keep growing it forever. It doesn’t take much effort at all: just a few simple materials and a sunny location. Ready to get started? Read on!

Materials You’ll Need

Mint Cuttings

Buy some fresh mint from the grocery store, or ask friends with mint plants if you can take some cuttings. Mint doesn’t propagate well from seed, so you’ll need established plants to work from.

Clean Scissors or Garden Snips

You’ll use these to remove bits of foliage from the plants you have. Since you’ll be growing in water, submerged leaves will decompose and cause disease and damage to the other plants.

A Sharp Knife

This is to trim the cuttings’ stems. In order for plants to draw water and nutrients properly, they need to be cut sharply and cleanly. Scissors compress their capillaries, so it’s best to use a sharp, clean knife instead.

Net Cups (or Other Cups with Holes in the Bottom)

Get yourself a few hydroponic mesh baskets like these. They’ll suspend your plants’ stems in the water so the foliage doesn’t get wet. Alternatively, you can poke holes into the bottoms of paper cups for a similar result.

A Large Container

Find a bucket or large bowl that you can float those cups in comfortably. Additionally, choose one that’s easy to manouver around, since you’ll need to change the water frequently.

Liquid Fertilizer

Since you’ll be growing in water rather than soil, you need to make sure your mint gets the essential nutrients in needs. Get yourself a high-quality organic liquid fertilizer like this one to keep your plants healthy.

How to Grow Mint Indoors in Water

This is a seriously easy process that you can repeat time and time again.

Step 1: Prepare Your Containers

Wash the large containers and small growing baskets with hot, soapy water. Then rinse them well and let them air dry completely.

Step 2: Remove Lower Leaves

Use your scissors or garden snips to remove the lower leaves from the mint cuttings. Try to cut these as close to the stem as possible, so there isn’t any leaf matter left.

Step 3: Cut the Stems at an Angle

Take your trimmed cuttings and lay them on a chopping board. Grab that sharp knife and cut the bottom of each stem at a 45 degree angle. This will allow them to draw up necessary water and nutrients properly.

Step 4: Insert the Cuttings into the Baskets

Grab those grow baskets or hole-punched cups, and insert one or two cuttings into each of them. Feed at least an inch of stem through the bottom so the cutting is secured, and the stem is guaranteed to stay in the water.

Step 5: Add Water

Fill the large container with room temperature water. Allow about 2″ of headspace between the water’s surface and the top of the container, to avoid spillage.

Step 6: Transfer the Cuttings

Place the baskets or cups with your cuttings in them into the container of water. Add them one at a time until they’ve all been placed in there.

Step 6: Place the Container in a Sunny Spot

Remember that mint needs a lot of sunshine every single day. Place your container in the sunniest place available, and watch the mint grow!

Step 7: When to Harvest

You can start trimming off bits of your mint when it reaches 6″ or 7″ in height. Use clean scissors or snips to remove the top-most leaves. This will make the cuttings re-grow outwards, rather than getting too tall.

Mint Care Tips

You’ll need to change the water out every two to three days so it doesn’t get stagnant. Still water can become a breeding ground for all kinds of bacteria, as well as insects like mosquitoes.

Additionally, be sure to feed your little mint plants once a month with that liquid fertilizer. Use about 1/4 of what they suggest on the bottle, diluted with fresh, clean water. Add that to the container and stir it gently so the nutrients are divided up easily.

You shouldn’t have to deal with many pests or problems when growing mint. The only insects you may have to contend with are spider mites. If these appear, treat your plants with an organic pesticide such as rosemary oil, neem oil, or warm water infused with raw garlic.

Wrap Up

Now that you know how to grow mint indoors in water, you’ll never be without this fabulous herb again. Crush whole leaves for tea, chop them finely to use in tabbouleh, or put them through a blender for sauces and chutneys. Or skip all of that and just live in fresh mojito land forever.

However you choose to use your mint, enjoy it well!