Why Is My Peace Lily Not Flowering?


Peace lilies (Spathiphyllum wallisii) are one of the easiest house plants to take care of. They’re also some of the most beautiful, with people being attracted to their gorgeous white flowers. The problem is that sometimes they stop blooming altogether. 

Do you feel like your peace lily isn’t as healthy or vibrant as it used to be? The problem may be due to lack of light, the wrong watering schedule or a need for repotting. Read on for detailed advice about how best to deal with your peace lily not flowering.

How often do peace lilies flower?

Despite being very stunning flowers, the peace lily is naturally a little unpredictable when it comes to blooming and will only do so periodically. It’s most likely to flower during the months of January to August. So, if your plant is not blooming in the autumn or winter, this may be one of the issues.

There’s also a little-known secret used by professional plant growers. Shop bought peace lilies have often been treated with gibberellic acid, a plant hormone, to encourage them to bloom. This allows them to be sold year-round with blooming flowers.

Some may call this ‘cheating’, but I guess it’s just professional knowledge. This may be the cause of your plant not having as many blooms as when you first brought it home – it’s not your fault!

For the most part, very young plants and very old peace lilies are less likely to bloom, so also bear this in mind when it comes to flowering.

Now we’ve established how peace lilies flower naturally, let’s see what changes you can make to encourage your plant to rebloom.

Peace lily not flowering? Here’s the fix!

Here are some of the ways to help your peace lily to bloom, by giving it the right growing conditions.

Light

One factor that is critically linked to flowering is the amount of light that the plant receives. Trust me, it’s a delicate balance. Although they can grow well in low light conditions, this is the most common reason that they won’t bloom, so try moving your peace lily out of the shade!

Peace lilies bloom best in bright or medium indirect sunlight, as direct sunlight can burn the leaves or cause brown spots, which we do not want!

Moving your plant closer to a window, especially if it’s north facing, could have a dramatic effect on your plant. You could even consider moving it to a different room, to receive more light.

Watering

A common problem with peace lilies is that they have been overwatered. They are partially drought-resistant and like the top inch or so of soil to dry out between watering. Your plant pot will need to have drainage holes to prevent overwatering or root rot.

If you think your plant may have been given too much water, try easing back on the watering. This could help you see flowers in the future.

Temperature and humidity

As well as water and sunlight, peace lilies need the right environment to bloom. As these plants originate from warm tropical forests, they grow best in a daytime temperature between 68-85oF (20-29oC). The temperature can drop about 10 degrees at night. Avoid putting your plant anywhere near cold draughts or where temperatures are significantly lower than this.

Being tropical, they like humid environments. You can place plants together to increase the humidity locally, or mist with water using a sprayer. Be aware of placing your plants close to a radiator or AC unit that can dry the air out.

Repotting

Another way you can help boost blooming is by repotting your peace lily. Sometimes, they can outgrow their containers, which can cause the plant to droop, or deform their growth. Therefore, giving it a new pot and a new environment to thrive in can also increase the chance of your peace lily blooming!

Fertiliser

Some Spathiphyllum owners have reported that using a fertiliser solved the problem of their peace lily not flowering. I fertilize my peace lily every 4-6 weeks during the spring and summer with a liquid all-purpose fertilizer. So, if you have tried everything else, fertilizing would be the next sensible step.

Summary

By following these tips, you should be able to get you peace lily to flower again. Don’t give up on your peace lily; they are resilient plants that need time to adapt to their new environment before they will bloom again!

If you’d like more tips on nurturing this beautiful plant, be sure to read our peace lily care tips.

Common questions on Peace lily flowers

Should I deadhead my peace lily?

After the flower has faded, the plant can look untidy. You can improve its appearance by cutting it at the base of the flower stalk. Unlike other plants, deadheading will not encourage further flowers to grow. It is more of a cosmetic procedure.

Why are my peace lily flowers green?

This could be due to a very young or quite old flower. When flowers first come out of bud, they can have a greenish white appearance. As they age, they can take on a greenish appearance or go completely green before going brown. This is a natural part of the flower’s cycle.

My peace lily blooms are starting to die. Is this normal?

Flowers on a peace lily can last for quite some time but will eventually die. A typical timescale could be 30-90 days. If you get longer than this from your peace lily flowers, then you are doing very well!

About the author 

Paul - Better Houseplants

Loves orchids and foliage houseplants. Always trying to be a better plant parent. Let's get growing!

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