When plants die, we automatically assume we’re responsible. Sometimes, we are. But what we might not realize is that, like all living things, plants have a lifespan, and sometimes their time is simply up.
Bearded iris can also live for generations. In fact, with proper care, they can literally live forever. Grown from rhizomes planted in late summer or early fall, their roots produce an endless supply of underground offshoots that continually sprout new life. Dig up and divide clumps every three to five years to prevent crowding, which can lead to root rot and decline, and discard old or dead rhizomes before replanting the newer roots in another sunny spot. For the best results, plant them in spring or fall in rich, slightly acidic soil in a shady spot that gets a bit of morning sun, monitor and protect them from pests like slugs, and divide them every three to five years after their first decade. Plant them in rich, well-draining soil in a sunny spot. Plant them in early spring or late summer to early fall, and divide clumps every three to five years to rejuvenate the plant .
Hostas can live for more than 50 years in zones 3-9. the plants often endure 50 years with little care Although each daylily flower lasts for just one day. Plant them in rich, well-draining soil in a sunny spot in zones 2, 3-9 or 11, depending on variety.
False indigo can easily exceed 50 years in your zone 3-9 garden. The plants are slow to establish, taking up to five years to reach maturity, but once established, their long, woody taproot helps them resist drought, frost and just about anything nature can throw their way. They do not, however, like to be disturbed, so select a sunny garden spot carefully and leave them be. Then decide who their next caretaker should be and write them into your will.

