THE PANSY IN CONVENIENT CAN FORM: Mothers, in popular culture, are often portrayed pruning prized roses, peaceful and relaxed. There may be an apron involved, or giant sun hat. Of course, few of us know that mother, a lady with tons of time on her gloved hands. If your mom should be spending more time in her yard, but has a hundred other things to do, perhaps the Flowers in the Can is a good hint this Mother's Day. FOUR VARIETIES: Peel back the top, and grow Pansies, Geraniums, Impatiens, or Dahlia. One can is $11 at Fred Flare.