Okay, I fibbed! They are self-seeding Annuals. I am well aware of the difference between Annuals and Perennials, however, each year if I see more of a plant species than the year before, without any reseeding on my part, to me, they are essentially: "Perennials"!
Having clarified this, here are my two suggestions:

#1: Digitalis/Foxglove



Simply a gorgeous elegant plant! I am a nut case when it comes to single color beds, e.g. yellow, red and pink rose beds, etc. But with this plant, the more the merrier, in any place in my gardens! Full sun or dappled shade -they don't care! In the Fall, wear gloves and pick the seed pods, and store them inside, then sprinkle outside in early Spring, where you want them. Note: At the base of existing plants, in the Fall and Spring you will find "baby" plants close to the mother. You can easily dig these up, and replant same wherever you want. You can easily overwinter the "babies" in your basement under lights.

#2: Hesperes/Dame Rocket


I noticed this plant in a road ditch quite a few years ago. I pulled them out and transplanted same. Think "Phlox", same shaped flower, taller, and extremely fragrant with a total lilac perfume. All the pastel colors ranging from pink, white, mauve and purple. Some regard them as invasive, but they are extremely easy to pull out, so easily controlled, and self-seeding. Make great cut flowers when cut early.

I love both of these biennial plants too, and consider them "perennials". I have to encourage foxglove to reseed in my current garden, but in past gardens they've done so happily on their own. I grow Dame's Rocket in a part of the garden that is full of tree roots where many other plants fail. DR is unfazed and grows happily.

Frank foxgloves reseed well here. My two favorites are Hemerocallis " daylilies and Oriental poppies.

Where I live Hesperis matronalis is considered an introduced invasive and is illegal to plant or transplant anywhere in the state.

I do enjoy Foxgloves though. Sometimes they reseed for me, other times they do not. I just put out more seeds if they get too thin or disappear on me for a season. That usually gets me 3 to 4 seasons without having to manually reseed.

Also, both of these plants are considered 'biennials', though sometimes they get called 'short lived perennials'. Meh...if an individual plant comes back more than one or two seasons on it's own, I'll just treat it like a perennial anyhow.

My two favorite perennials would have to be mums and peonies. They are big, showy flowers that I can ignore all season and still do well. My reseeding annuals "perennials" are pot marigolds and petunias. Its not summer without them.

I am completely at a loss with respect to "Perennial" Mums? Please enlighten me, someone?

sorry - mums are short for Chrysanthemums they are a fall flowering plant.

fwmosher said:I am completely at a loss with respect to "Perennial" Mums? Please enlighten me, someone?

Do you mean you don't know what 'Mums' are? Or you have never encountered 'Mums' that you would call perennial? Different answer depending on how you meant it, exactly.

Oh...just realized that while I commented on what Franks fav perennials are, I never mentioned my own...

Mine would have to be Hemerocallis and Hosta. I can't imagine my gardens not having an abundance of both of these plants.

Two of many of my favorites

Astilbe




And Hostas!

For me they would be Echinacea and Heuchera. They both give almost full season color.

Robertduval14; I was commenting on the "Hardy Mums" ruse, rampant in Canada. We do not have "perennial" mums up here, which repeat.

Many of those hardy Mums are, in fact, perennial. It really depends on when they get planted and where. Some would call them a 'tender perennial' though the patch I once had, which originated from a typical pot of them sold here ever late summer/early fall, could not be killed till I ripped out every little piece of root. Most of the ones planted in Fall don't have enough in ground time to survive the winter...but plant those same things earlier in the year and you may be surprised. Personally, I won't plant them in ground again...they became a bit of a bully in my garden and got into spaces I did not want them in.

Here is an article about them...
https://www.thespruce.com/fall...

yes, mums are definitely perennial--I have quite a few pushy mums--I love them though
I even get new varieties when I let the seedlings grow. Most of them are nothing too special, and unfortunately, the coolest one so far is a bright yellow spoon mum, that I love, growing in a most awkward spot in my sidewalk I can't figure out how to extract it for relocation, so, it gets to stay there.

My favorite perennial would be my daylilies. My second favorite is an annual... my petunias that reseed every year.

I love reseeding annuals that act like perennials!

Neal, me too
Nice Vickie

The main difference being I never know where they're going to show up, but surprises are a big part of gardening!

Right now. I'll say purple coneflower and toad lily.
My toad lily have been with me since my son was in the 6th grade, he is now 24.
A friend and I bought it and shared the clump. Hers died and I recently gave her some from mine- they have multiplied through the years.