For the most part, the Summer-flowering perennials are sturdy plants that can withstand high temperatures rind fairly-dry The mallows are deep-rooted arid once established, will flourish for many years. They grow best where the soil is on the moist side. Yuccas thrive in hot, dry locutions, even on slopes and make striking accent plants in borders. Shasta daises have drawn the attention of hybridizers in recent years and ninny new varieties have come into the market. To keep the plants vigorous, divide them freely. Liatris, or Kansas gayfeather, is a superb cut flower and make it showy clump in the hardy border.
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