CFD Floral Care & Maintenance 2

Question 1

Which chemical compound is most commonly added to floral preservative solutions to lower the pH of water and improve stem hydration?

Accepted Answer

Citric acid

Answer

Citric acid is the primary acidifier in commercial floral preservatives, lowering water pH to around 3.5–4.5 for optimal stem uptake.

Question 2

What is the recommended water temperature when conditioning tropical flowers such as anthuriums and birds of paradise?

Accepted Answer

Room-temperature water (65–75°F)

Answer

Tropical flowers are chilling-sensitive and should be conditioned in room-temperature water to prevent petal damage.

Question 3

A designer notices that tulips in a vase are growing taller and bending toward the light after arrangement. What is the best corrective action?

Accepted Answer

Re-cut stems and store in a cool, dark cooler

Answer

Tulips continue to grow and exhibit phototropism; re-cutting and storing in a cool, dark environment slows growth and reduces bending.

Question 4

Which type of bacteria most commonly blocks the xylem vessels of cut flowers, reducing water uptake?

Accepted Answer

Gram-negative rod-shaped bacteria

Answer

Gram-negative rod-shaped bacteria are the primary culprits in stem-end blockage, thriving in vase water and multiplying rapidly.

Question 5

How far up the stem should foliage be removed before placing flowers in water?

Accepted Answer

All foliage below the water line

Answer

Submerged foliage decomposes quickly, feeding bacterial growth and fouling the water, so all leaves below the waterline must be stripped.

(CFD) Certified Floral Designer Practice Test