Plan the perfect garden with our interactive tool →

Sugar Water As a Flower Preservative

...
red hebiscus flower, Malaysia national flower image by Heng kong Chen from Fotolia.com

Sugar mixed with water is an important component of cut flower preservation. However, it should not be used by itself. Cut flowers require a certain amount of acidity in their water, as well as bacterial control if they are to thrive. All necessary components exist in commercial flower preservatives, but can also easily be replicated at home.

Function

Sugar is added to water to provide food to cut flowers, thus preserving their lives. Whether it is part of a homemade cut flower preservative recipe or a commercially available flower preservative, sugar is most commonly used in conjunction with water. Other ingredients are usually also included.

  • Sugar mixed with water is an important component of cut flower preservation.
  • All necessary components exist in commercial flower preservatives, but can also easily be replicated at home.

Time Frame

Cut flowers should be placed in water with some sort of preservative as soon as possible after cutting. This preserves the flowers at their best, without allowing them time to begin an accelerated period of decay.

Misconceptions

Sugar alone mixed with water is not enough to preserve flowers. Regardless of which type of flower it is, cut flowers prefer slightly acidic water. Most water is not acidic enough on its own to satisfy the needs of cut flowers. Ideal water pH for cut flowers is between 3.5 and 4.0 (keep in mind that a pH of 7 is neutral). Commercial preservatives usually include some sort of biocide to address the problem of bacterial growth in water, as well as citric acid to enhance the acidity of the water.

  • Cut flowers should be placed in water with some sort of preservative as soon as possible after cutting.
  • Commercial preservatives usually include some sort of biocide to address the problem of bacterial growth in water, as well as citric acid to enhance the acidity of the water.

Warning

While sugar is a great source of food for cut flowers, it is also a great source of food for bacteria. For this reason, many homemade floral preservative recipes call for bleach or hydrogen peroxide to help control bacterial growth. When flowers are cut, their juices contain sugars and amino acids that bacteria find irresistible. Bacteria do not do well in a dry environment, so their effects are not usually witnessed on a bunch of flowers bought from a florist. Their effects are felt when the cut flowers are immersed in water, where bacteria thrive.

Prevention/Solution

Hydrogen peroxide or bleach should be factors in homemade flower preservative recipes, alongside the sugar. Commercial flower preservative recipes should include some sort of biocide as well to kill bacteria. Additionally, the bottom inch of all cut flower stems should be cut off prior to immersion in any water/plant food formulation. The Department of Environmental Horticulture at the University of California – Davis has found that cutting a single inch off the bottoms of stems removes virtually all bacteria that were attracted to the cut flowers when they began to ooze juice. However, without combining this practice with an effective biocide in the plant's water, bacteria will thrive once more. Plain sugar water is unfortunately not a good way to achieve healthy, long-lasting cut flowers.

  • While sugar is a great source of food for cut flowers, it is also a great source of food for bacteria.
  • For this reason, many homemade floral preservative recipes call for bleach or hydrogen peroxide to help control bacterial growth.

Related Articles

How to Keep Flowers Alive in a Vase
How to Keep Flowers Alive in a Vase
How Do Florists Keep Flowers Fresh?
How Do Florists Keep Flowers Fresh?
Is Miracle-Gro Good for Cut Flowers?
Is Miracle-Gro Good for Cut Flowers?
Homemade Flower Food for Fresh-Cut Flowers
Homemade Flower Food for Fresh-Cut Flowers
Flower Preservative Packet Ingredients
Flower Preservative Packet Ingredients
How to Use Sugar & Vinegar to Preserve Cut Flowers
How to Use Sugar & Vinegar to Preserve Cut Flowers
How to Get Flower Buds to Open on Fresh Flowers
How to Get Flower Buds to Open on Fresh Flowers
How Do Flowers Absorb Water?
How Do Flowers Absorb Water?
The Effect of Aspirin on Cut Flowers
The Effect of Aspirin on Cut Flowers
Homemade Cut Flower Preservative
Homemade Cut Flower Preservative
What Is the Life Span of Cut Flowers?
What Is the Life Span of Cut Flowers?
How to Put an Aspirin in the Water for Fresh Flowers
How to Put an Aspirin in the Water for Fresh Flowers
The Effects of Sugar Water on Roses
The Effects of Sugar Water on Roses
Will Baking Soda Preserve the Life of Fresh Cut Flowers?
Will Baking Soda Preserve the Life of Fresh Cut Flowers?
How to Substitute Flower Food
How to Substitute Flower Food
Sugar Water for Plants
Sugar Water for Plants
Garden Guides
×