only for the flowers to emerge in the fall without any leaves-a process called hysteranthy. They’re not considered invasive, but do keep in mind that all parts of the plant are toxic if ingested ...

However, not all perennials should be trimmed this ... The buds carrying next year’s flowers form in the fall, so wait until ...

Elise Harlock, brand manager at Prestige Flowers, has revealed six easy-to-grow flowers that promise a stunning summer display with "minimal effort".