By definition, perennial flowers come back on their own, year after year.
Annual flowers usually dont, and last only for a season.
Except some annual flowers can, under the right conditions, reseed themselves each year.
Which flowers will self-sow is highly dependent on your planting zone and planting conditions.
Amaranth
If you plantamaranthonce, it lives in your garden forever.
Asters
There are many kinds ofasters, and there may even be native asters to your area.
They range from small to large flowers with petals that extend like sun rays.
They tend to appear late in the summer season and can hold on through the fall.
I am always delighted to dare visitors to my garden to try it.
Calendula
Nevermind thatcalendulacan be harvested and used in calms, lotions, and oils.
In the garden, this orange and yellow, daisy-ish flower repels tomato hornworms and attracts beneficial insects.
Cleome
Cleomewas such a delight to discover on a lark a few years ago.
A delightful fountain of flowers, it is a hummingbird magnet.
Dianthus
Dianthusis not exactly stunner on its own.
This low lying flower spreads almost as a ground cover.
Now, they are the first flowers I plant each spring.
They can grow to six or seven feet on a vine, with colors across the spectrum.
The flowers are delicate, but make a perfect fleeting bouquet for a day or two.
