Should You Use Warm Water for Cut Flowers?

Whether you're cultivating a cutting garden this year or simply wish to extend the life of a bouquet recently given to you, learning how to keep cut flowers fresh for as long as possible is something every flower lover is constantly chasing. As a result, social media is filled with quick "hacks" to help preserve the life of your arrangements (many of which can inadvertently have the opposite effect).

From adding Sprite to the water to act as flower food to propagating spent rose stems by sticking them in a potato (yes, really), we’ve heard it all. But there’s one long-standing floral myth we're officially here to debunk. According to expert florists, warm water is unnecessary for cut flowers—with a bit of a caveat. 

What Temperature Is Best for Cut Flowers?

According to the myth, warm water is ideal for cut flowers since it is more readily absorbed than cold water. This supposedly results in better-hydrated flowers, which in turn gets you in longer-lasting blooms. However, according to experts, your flowers prefer cool or room-temperature water.

“The only thing that speeds up the natural decay of a flower is bacteria," says Hannah Beaton, owner and head florist at The Brighton Florist. "Warm water would speed up the process of the bacteria multiplying and would cause your flowers to die more quickly."

This is why it’s common to see fresh-cut flower bouquets stored in fridges at your local flower shop or floral department. Cool temperatures help extend the life of the flower, slowing down the blooming process. 

That said, there are certain scenarios in which florists stray from the norm: Since it’s ideal for hydrating flowers quickly, you can place wilted or dehydrated flowers in warmer water to perk them back up quickly. 

Adjusting Water Temperature Based on Flower Species

Most flowers can thrive in room temperature water—however, head florist and owner of Wellington Florist JP Varvarigos says that certain varieties should always be placed in cold water to help preserve their freshness. 

“Some flowers [like] cold water, which is mainly to slow them down from opening too quickly," he explains. "Bulb flowers—tulips, calla lilies, daffodils, amaryllis, and roses—fall into this category."

Ultimately, whether you use colder or room temperature water for your blooms, the difference may be marginal. More important than the temperature of the water is how well you care for them overall. This includes changing the water regularly, recutting the stems, adding flower food to the water, and making sure you prevent bacteria growth.

“For best results, make sure any leaves below the waterline are removed as these can also cause bacteria build up," Beaton says. "Replace your fresh, cool water and re-cut the flower stems every couple of days. Gold star if you wash the vase too."

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