There are several factors that can determine how long a bouquet of flowers can last without water. These factors include the type of flowers, the temperature of the environment, and whether the flowers have been properly cared for before being left out of water.
Different types of flowers have different water requirements and lifespans. Some flowers are more resilient and can last longer without water, while others are more delicate and may wilt more quickly. For example, roses are known to be quite hardy and can last several hours without water, while more delicate flowers like hydrangeas may start to wilt within an hour or two.
The temperature of the environment also plays a role in how long flowers can last without water. In warmer temperatures, flowers tend to dehydrate more quickly and may wilt faster. On the other hand, cooler temperatures can help to slow down the wilting process and extend the lifespan of the flowers. Ideally, flowers should be kept in a cool, shaded area if they need to be left out of water for an extended period of time.
Proper care before leaving the flowers out of water can also make a difference in how long they last. It is important to make sure that the flowers are properly hydrated before being left out of water. This can be done by placing the stems in a vase of water for a few hours prior to removing them. Additionally, removing any foliage that will be submerged in water can help to prevent bacterial growth and prolong the life of the flowers.
In my personal experience, I have found that flowers can generally last anywhere from a few hours to a full day without water, depending on the factors mentioned above. I have left bouquets of flowers out of water for several hours while traveling or during events, and while they may start to wilt slightly, they can still look presentable.
To sum up, the length of time that a bouquet of flowers can last without water can vary depending on the type of flowers, the temperature of the environment, and how well they have been cared for. It is best to provide as much hydration as possible before leaving them out of water and to keep them in a cool, shaded area to extend their lifespan.