There's still time to add perennials to the garden while moderate air and soil temperatures encourage, rather than stress plants. Pick some tried and true performers with long-lasting floral displays and few demands. Among them, to name a few, are alstroemeria, verbena, coreopsis, Asclepias tuberosa (sunny flowers and Monarch butterflies - it's their host plant), and agastache. With the rainy season behind us, take care to water these new additions regularly and deeply during their first season in the garden.