Impatiens ask little more than a shady spot and enough water to keep them from wilting. Plant these pretty annuals when the weather is reliably warm. In recent years, many impatiens (I. walleriana) have succumbed to downy mildew. 'Big Bounce' (pictured) is a new hybrid for shade to partial sun that resists this deadly disease. You'll also find disease-resistant impatiens in the 'Bounce' series.