Dividing peace lilies every few years helps to keep the plants healthy and it’s a great way to increase your indoor plant collection without buying more plants.
In this article I’ll show you step by step how to divide peace lily plants and keep them healthy after they’ve been separated.
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Peace lilies (Spathiphyllum) can live happily in the same pot for many years but eventually they’ll outgrow the pot.
You’ll know it’s time to divide your peace lily when:
- You can see multiple crowns in the pot
- The plant produces less flowers or stops flowering altogether
- The soil dries out very quickly after watering
- Roots begin growing out the bottom of the pot
Repot or divide?
If your peace lily has outgrown its pot but it only has one stalk or crown you won’t be able to divide it, so in this case just repot the plant into a larger pot.
Some people are concerned about damaging their plant by dividing it and prefer to repot it in a larger container and that’s ok, but bear in mind that peace lilies can get quite big after five to 10 years of growth.
One of my peace lilies had been in the same pot for more than 10 years so it was well overdue to be divided.
As you can see in the photo below it was getting too big for the pot and it hadn’t bloomed for a couple of years so it was really time for division.
HOW TO DIVIDE PEACE LILY PLANTS
Things you’ll need:
- An overgrown peace lily plant
- Sharp scissors or a knife
- New pots
- Good quality potting soil
Give your plant a thorough watering the day before you divide it to ensure that it’s in good condition before you start separating it.
Check how many crowns or offsets the plant has and make sure that you have enough containers to pot them all up. You can add more than one offset to each pot if you don’t have enough.
Gently remove the plant from the pot by turning the pot to the side and giving it a slight squeeze.
If the plant is severely root bound you may have to pull gently on the stem to get it out of the pot.
Once the peace lily is out of the pot you can cut back any brown leaves or stems around the base of the plant to tidy it up.
The next step involves separating the crowns and you can use your hands to gently pull the roots apart or if the root ball is very tight you can use scissors or a knife to cut through the roots.
Ensure that each crown has at least three leaves and some roots attached.
Pot up the new plants in pots that are large enough to fit the roots and accommodate the plant.
Water the new plants thoroughly until the water runs out the bottom of the pot. It’s best to do this outdoors or in the bath to avoid making a mess.
Place the plants in a cool spot with indirect light to allow them to settle into their new pots.
Transplant shock is common after dividing peace lilies so you may notice that the leaves are droopy for a few days after repotting. 
Keep the soil moist and they’ll perk up again in a short amount of time.
My plant had three large crowns and some smaller offsets but I only had four pots so the largest pot has quite a few offsets and I can divide them again in a year or two.
Hopefully they’ll be happy in their new pots.
When is the best time to divide peace lilies?
You can separate peace lilies just about any time of the year, but it’s best to avoid doing it during very cold or hot weather so you don’t stress the plant.
Can you divide peace lilies while they’re blooming?
I prefer to wait until the plants have finished blooming before dividing them to avoid the flowers wilting.
So there are my tips for dividing and repotting peace lily plants.
With the right care you can propagate peace lilies every few years and they make excellent gifts.
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