A few of my perennial things.

Some plants traditionally considered single-season can over-winter, if kept warm enough. In some ways this is an advantage since I don't have to start them up every season. Some of these may be "biennial". Time will tell.

Stevia, since 2021

Stevia was really hard to start, and I have spent probably $12 to get a single growing specimen. So I was glad when I was able to get it to over-winter (at least once) .

Eggplant, black beauty, since 2019

This plant looks terrible in the picture, and indeed this may be it's last year. But hidden in the shadows it has 3 ready-to-harvest fruits! Had I known it was going to grow multiple years, I would not have planted it in row 3. Basically nothing ever grows behind it. A small price to pay I suppose.

Cherokee Tomato 2021

I had to do a lot of work to keep this going during winter. Most of it's compadres dried and died early. No telling if it will make it through this season. But it's already yielded several fruits this season and has about 3 green one's now. The roots are in the SFG, but the vine has been trained (down boy!) onto a pyramid trellis, which itself has a survival story of 20 years or more.

Pear Tomato 2020

The root stock of this plant is now about as thick as a tree branch. It's roots are in the SFG, but it's vines have been trained (hah!) onto a second bamboo trellis. I've taken cuttings from this and grown them in a non-SFG planter several times. The seeds for this originally came free with an order from Baker Seeds, so I think I got my money's worth! Once again, most of my pear tomatoes only lasted one season. So the trick is to get them well established the first season.

Honorable Mentions

Didn't include a picture of dinosaur (Italian) Kale which is growing in the front yard "in" an SFG. Or rather the SFG was built around it, so it's been around since 2018. It's showing it's age but is about 5 feet high. The pattern is that eventually they topple over.

Also have Swiss (?) chard which can grow 2 or more years. It's very random why it wants to grow big leaves on one plant but little leaflets on another. There is a chard that calls itself "Perpetual Chard" which may also be the same thing.

Ukrainian Red Kale seems to also grow at least 3 years -- see separate post on that.

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Potential Perennial or Biennial plants are one of the benefits of living in the southern latitudes of the U.S. Tomatoes, peppers, eggplants, Swiss chard, kale, rosemary, oregano, stevia, thyme, catnip and other mints, New Zealand spinach, walking onions, and I'm sure other things that I just haven't grown.

The downside is the thrill that middle and northern latitude folks have of nursing along new seedlings and planting in a clean slate in the spring.

I never thought about it!  That’s crazy!