Grandiflora Petunias: Pros and Cons

The first varieties of petunias were discovered in South America in the 1700s; however, the grandiflora Petunia was not developed until more than 200 years later. Sometime in the 1930s, seed companies in Germany began to breed grandiflora petunias. These open-pollinated varieties expanded the diversity of the Petunia considerably and also helped to create many new colors for the variety. These days, the grandiflora Petunia is by far the most popular variety of the plant. Grandiflora petunias can make excellent additions to your flower bed; however, there are a few things that you should consider.

Pros of Grandiflora Petunias

One of the reasons that grandiflora petunias are the most popular variety of Petunia are the grandiflora variety’s huge, colorful and wavy blossoms that average between about 3 inches to 5 inches in diameter. The grandiflora Petunia also comes in almost every color imaginable - except black or dark blue. Because grandiflora petunias come in so many colors, they are very popular choices for flowerbeds or gardens that require a lot of color diversity or a specific color to provide a desired color contrast or effect.

Grandiflora petunias make excellent cut flowers and also are very popular in dried flower arrangements. These types of petunias also make excellent companion plants for many types of evergreen shrubs are flowering shrubs when contrast and variety is needed. Grandiflora petunias also grow very well in pots and containers, and are also very popular hanging basket flower options.

Cons of Grandiflora Petunias

While the large flower blooms of grandiflora petunias are certainly beautiful, they also very susceptible to damage in harsh weather conditions. The flowers on grandiflora petunias are easily damaged by wind or rain, and are easily wilted in a lot of direct sunlight. Therefore, most varieties of grandiflora petunias must be planted in areas where some sunlight is available, while also being in an area that offers them some protection from strong wind or heavy rain.

In addition to many varieties of grandiflora petunias being relatively fragile or frail, they are also much more difficult to deadhead or cut back than many other varieties of flowers. When compared with multiflora petunias and other varieties of flowers, grandiflora petunias also require much more care during propagation or transplanting. Also, growing periods for grandiflora petunias are quite long and may require that the Petunia be started inside the home 10 or 12 weeks before transplanting the grandiflora Petunia outside.

If you live in the Deep South or another very warm climate area, grandiflora petunias are also very susceptible to root or bloom rot because of the high heat and humidity. While there are several varieties of grandiflora petunias that have been adapted for growth in very hot areas, not all varieties of this type are suitable. Likewise, grandiflora petunias don't like extremely cold environments either and will usually result in an annual rather than a perennial in these areas. If you're considering planting grandiflora petunias, you should check with a local nursery to find out which varieties of grandiflora petunias are suitable for your area.