When do cattails usually flower?

Cattails typically produce their flower spikes in mid to late summer. If you do not see them by late August, they likely will not appear that year.

Do I need to fertilize to get flowers?

Cattails are usually heavy feeders, but they get most nutrients from the soil or water. If your soil is very poor, a slow release aquatic fertilizer can help.

Cattail: not flowering, causes and fixes

Check these first

Confirm the plant is getting at least 6 to 8 hours of direct sun.
Check if the plant has enough space to grow.
Ensure the plant is mature enough to flower.

Likely causes

Insufficient sunlight
Most likely
How to tell: The plant looks healthy and green but stays short and never develops the characteristic flower stalks. It is likely in a shaded or partially shaded area.
What to do: Move the plant to a location that receives full, direct sun for most of the day. Cattails need intense light to trigger the flowering process.
Young plant age
Possible
How to tell: The plant is small and has only been in its current spot for a short time. It may just need more time to establish its root system.
What to do: Be patient and ensure the plant has consistent water and sun. It will likely bloom once it has matured and filled out its container or space.

Other plants that won't flower

Find out what's wrong with your cattail

The list above covers the usual causes. Pocket Botanist looks at a photo of your actual plant and tells you the likely cause, how serious it is, and what to try first. Identification and a health check are free.

When to worry

It is normal for young or newly transplanted cattails to skip a year of flowering. Only worry if the plant has been in full sun for several years without any sign of a spike.

Stopping it coming back

Provide maximum sun exposure and keep the roots wet throughout the growing season. A healthy, vigorous plant is much more likely to bloom.

Cattail: not flowering? Check yours with a photo

Every plant is a little different. Take a photo of your cattail and Pocket Botanist tells you which cause is most likely, how serious it is, and what to try first. A few checks a day are free. Save the plant and you get care reminders timed for it.

Get the app · Or check it from a photo now, free

Questions people ask

When do cattails usually flower?: Cattails typically produce their flower spikes in mid to late summer. If you do not see them by late August, they likely will not appear that year.
Do I need to fertilize to get flowers?: Cattails are usually heavy feeders, but they get most nutrients from the soil or water. If your soil is very poor, a slow release aquatic fertilizer can help.

Why is my cattail not producing flower spikes?