Petunias are generally insect pollinated, with the exception ofP. exserta, which is a rare, red-flowered, hummingbird-pollinated species. Most petunias arediploid with 14chromosomes and are interfertile with other petunia species,[9][10] as well as withCalibrachoa.
Petunias can tolerate relatively harsh conditions and hot climates, but not frost. They need at least five hours of sunlight every day and flourish in moist soil and conditions of low atmospheric humidity. They are best grown from seed. Watering once a week should be sufficient in most regions. Hanging baskets and other containers need more frequent watering.[12] Maximum growth occurs in late spring. Applying fertilizer monthly or weekly, depending on the variety, will help the plant grow quickly.
Many species other thanPetunia ×atkinsiana are also gaining popularity in the home garden.[23] A wide range of flower colours, sizes, and plant architectures are available in bothPetunia ×atkinsiana and other species.[3]
TheMaya andInca believed that the scent of petunias had the power to ward off underworld monsters and spirits. Their flower-buds were bunched together for magical drinks.[citation needed]
^"The plant list: Petunia". Royal Botanic Garden Kew and Missouri Botanic Garden. Retrieved17 March 2018.
^“Classification for Kingdom Plantae Down to Family Solanaceae”. Natural Resources Conservation Service. United States Department of Agriculture. 2009. Web. July 8, 2009.[1]
^abEllis, Barbara W. (1999).Taylor's Guide to Annuals. Boston: Houghton Mifflin Co.
^Griesbach, R.J.(2007) in Flower breeding and genetics: Issues, challenges and opportunities for the 21st century, Petunia, ed Anderson N.O. (Springer, Dordrecht, The Netherlands), pp 301–336.
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