What is the ideal pH level of water for cut flowers?

The ideal pH level of water for cut flowers is approximately 7.0, which is neutral. This pH level is optimal because it helps maintain the health and longevity of the flowers by ensuring that nutrients in the water remain available and accessible. A neutral pH allows most plant cells to function properly and supports the effectiveness of flower preservatives, which are often used to keep cut flowers fresh for an extended period.

Maintaining water at a neutral pH also minimizes the risk of causing damage to the delicate tissues of the cut stems. At this level, the water does not create an environment that may promote the growth of harmful bacteria and fungi, which can lead to a shorter vase life for the flowers. In contrast, levels outside the neutral range—such as acidic (around 5.0) or basic (around 8.5)—can hinder nutrient absorption and water uptake, adversely affecting the flowers.