Petunia growers may select from many different growth habits, colors, and bloom types. The grandifloras have large single or double flowers. Doubles get heavy in the rain so may be beaten down. The multifloras produce more flowers than grandifloras but they will not be as large although they can be single or double. The cascade types have a drooping growth habit useful in hanging pots. Petunia is popular because it is easy to grow. It needs full sun and a light textured, well drained, moderately moist soil. Petunia is tolerant of most soil types except clay and it requires good drainage. Older plants tend to sprawl so are sheared back in early July promote new growth and renewed blooming. Fertilize after the shearing to speed the recovery. Petunias range in height from 8 to 24 inches. Too much water and fertilizer gives big plants but few flowers.
Propagation is by seed or cuttings. Softwood cuttings taken in fall or late summer root easily. The seed is very small so may be hard to work with. Germination takes ten to twelve days at 70 to 80 degrees. Don't cover the seed with soil. Sow the seed eight weeks prior to the outdoor planting date. The smallest plants may be the best bloomers. Spindly seedlings may be pinched.
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|Petunia x hybrida - 69K|