For me easy care or indestructable plants are characterized by: Longevity, resistance to disease and insects, dont need to be divided by more than 4 or 5 years, has a tolerance of growing conditions, such as summer heat and cold winters, dont need staking and wont take over the garden. Long bloom period and attractive foliage are a plus for me..
Astilbe, Liatris (Bazing Stars), Lady's Mantel, Veronica Speedwell, Bleeding Hearts, Daylilies, Pink's (dianthus), Geranium Perennial (cranesbill), Sedum (stonecrop), Single flower Peonies,
Ornamental Grasses, Yarrow, Echinops (Globe Thistle), Coral Bells, Geums, Siberian Iris, Candytuft, Butterfly Flower
If you dont mind some dead heading or plants that spread out, here are some tough plants:: Purple Coneflowers, Russian Sage, Golden Marguerite (Athenis), Thyme, Wormwood (Artemesia), Oriental Poppies, Yarrow, Bronze Fennel, Catmint (nepeta), Blanketflower, Bearded Iris, Chives
I have to say, I love Catmint. It is one of the first plants to bloom in early spring, and it gives lovely blue/purple flowers that bloom for most of the summer, it reblooms again in the fall. The leaves have that musky minty smell when brushed or stepped on. It spreads out by the roots..It survives drought and will grow in some pretty sandy, gravely soil also..I use it along my bordered walkway in the front of my flower/herb garden. Bees love it !!
Ginny