Gerberas are the perfect cut flowers.
- Gerberas are 30 or more species of perennial plants native to Africa, South America, and Asia.
- Gerberas are from the family Asteraceae, the family of sunflowers and daisies and most of the commonly grown hybrids come from a cross of the jamesonii and the viridifolia species.
- Gerberas are named after Trauggott Gerber, a botanist and physician from the 1700s, from Germany, and it is not certain as to why botanist Jan Frederik Gronovius, a Dutchman, named the plant after him, as much of Gerber’s work was done in Russia.
- Gerberas are also known as ‘African daisies’, ‘Barberton daisies’, ‘gerber daisies’, ‘Transvaal daisies’ and’gerbera daisies’, although some of these names specifically refer to the jamesonii species.
- Gerbera flowers can be coloured pink, red, orange, yellow, cream and white or variegated and can have wide or narrow petals in single or double layers.
- Gerberas have one large ‘head’ per stem, that is typically called the ‘flower’, however each head actually contains numerous small flowers.
- Gerbera flowers have a diameter of 7 to 12 centimetres (2.8 to 4.7 inches), and bloom in spring to autumn, depending on the species and growing conditions.
- Gerberas are commonly grown as ornamental garden plants and are very popular as cut flowers due to their ability to last up to two weeks in a vase.
- Gerberas grow best in warm climates, in sunny areas, and in moist soil that has good drainage.
- Gerbera plants grow from 15 to 76 centimetres (6 to 30 inches) in height, and have green leaves.
Bibliography:
Gerbera, 2014, Wikipedia, http://en.wikipedia.org/wiki/Gerbera
Gerberas 2014, Burke’s Backyard, http://www.burkesbackyard.com.au/1998/archives/26/in_the_garden/flowering_plants_and_shrubs/gerberas
Gerbera daisy, 2014, Better Homes and Gardens, http://www.bhg.com/gardening/plant-dictionary/annual/gerbera-daisy/

Can you tell me where I’ will find gerberas with narrow petals in a single layer. I would like to buy some (like those in the photo above). Thanks.
I’m not too sure – you’ll need to poke around a nurseries and online stores. Perhaps you could look for gerbera jamesonii?