A cultivar is a cultivated variety. It’s a plant line that humans have selected, named, and propagated to keep specific, desirable traits stable and uniform. The term itself signals intentional, ongoing cultivation and maintenance of those traits, typically through vegetative propagation to preserve consistency. This differs from a hybrid, which is a cross between two different parents and may not breed true without careful control. It also differs from a botanical variety, which is a natural variation within a species rather than one shaped and maintained by human cultivation. And it’s not the same as a clone, which refers to genetically identical copies derived from a single parent; though cultivars are often propagated clonally to preserve traits, the defining idea is that a cultivar is a human-maintained cultivated variety.

Softened water harms cut flowers because its higher salt level, especially sodium salts, interferes with the flowers’ ability to take up water. An ion-exchange softener swaps calcium and magnesium for sodium, boosting sodium in the water. The increased salt concentration raises osmotic pressure in the stem’s vascular system, making it harder for water to move up from the vase. With water uptake hindered, the flowers lose turgor and wilt sooner, shortening vase life. Sugars aren’t the issue here, and acids aren’t necessarily elevated, while the broader term “minerals” is vague—what matters is the elevated sodium salts that come from softened water.

Harmony refers to how well the elements of a design relate to each other to create a pleasing, cohesive relationship among color, texture, line, and form. Unity is the overall sense that the arrangement reads as a single, complete idea, with every part supporting that idea so the whole dominates the impression. The described choice captures this distinction clearly: harmony is about the careful selection of parts that fit together to form the floral composition, while unity is about the entire arrangement being perceived as one cohesive whole, stronger than its individual parts. In practice, you might choose colors and shapes that work well together to achieve harmony, and then arrange and emphasize a unifying focal point or rhythm so the piece feels like a single concept. Other options are too narrow or mix concepts. Limiting harmony to color coordination, or unity to identical shapes, misses how harmony also involves compatible relationships beyond color and how unity arises from the overall cohesiveness rather than just a single attribute. Likewise, equating harmony with balance or unity with proportion, or linking harmony to contrast and unity to rhythm, doesn’t align with how these terms describe the relationship among design elements and the perception of the whole.

A plant produced from crossing two plants with different genetic elements is called a hybrid. In botany, crossing distinct genetic backgrounds combines traits from both parents, often resulting in offspring with a mix of desirable characteristics and sometimes greater vigor. A cultivar refers to a cultivated variety chosen for specific traits and maintained through propagation, and it isn’t the term for the offspring produced by crossing. Genus and species are taxonomic ranks that describe groups of related organisms, not the outcome of a cross.