What Is the Effect of Food Coloring on a Plant?

Different colors of food dye may be added to plants' water.

People add food coloring to water used to water plants in order to alter the color of the plant. This alteration is done to show children how plants absorb water or to make white flowers more colorful and decorative.

Effects on Growing Plants

The main effect of food coloring on potted plants or plants still in the ground is a slight color change.

Adding food coloring to a growing plant may slightly alter the color of the plant, according to the University of Illinois.

Effects on Cut Stems

White flowers in a vase can be tinted the most by food coloring.

Fresh cut flowers, especially white or light-colored ones, will change color when food coloring is added to their water.

Dye injection

Rainbow flowers can be created by injecting different shades of food coloring into a flower stem.

Different colors of food coloring can be injected into different areas of a white flower stem to produce rainbow-colored flowers. These flowers are often sold as novel decorative bouquets.

Risks

According to the University of Illinois, food coloring will not harm plants.

Mechanism

The food coloring dissolves in the plant's water supply and is absorbed by the plant along with the water. The colorful water is drawn up the plant's stem and distributed within the plant's leaves and petals.

References

• University of Illinois Food Coloring and Plants Information.
• PBS Kids Experiment on Coloring Flowers