I have a water sprite in my tank, which is very similar to water wisteria (one is a fern plant, the other one is some other type of plant, but they look almost the same and behave very similarly).
I added it to my tank on January 8th, when it looked like this:
View attachment 127712
And I took a picture of it just now, and it looks like this:
View attachment 127713
The second picture is more zoomed out since I couldn't fit the whole plant in the picture (still missing a bit where it goes all the way to the surface, and there is an amazon sword plant and a fish to make comparison more difficult!
The plant that is floating at the top in the second picture is some raggedy looking hornwort.
In the past 20 days that this plant has been in my tank, I have not dosed any liquid fertilizer (I added root tabs to the soil in December when I set up the tank but haven't touched those since), and the only change has been the addition of fish. Eventually, I will probably decide to add some liquid fertilizer, but in the interim, it's clearly growing without fertilizer as well.
The plants that Essjay recommended to you, and most of the plants that seem to be available to you in your store, are hardy plants that should grow virtually on their own with no effort. If a plant is $5-10, I would just take the risk and see what happens. You can't really screw much up with a plant. If it dies, it dies, and you take it out of the tank and say "oh well, tried that, it didn't work, what's next?"
I also wanted to add a little bit of a teaching point after reading the conversation you and Essjay have been having, the term "crashed cycle" or "tank crash" is more commonly used when there is a tank with fish in there already, and either due to poor maintenance, equipment failure, or a sudden change in something (like for example the water company changing the water source), the cycle gets disrupted and/or fish become ill and die because the balance of the aquarium goes off-kilter. In most cases, the most easily measurable signs of this are new ammonia or nitrites where the tank had been not showing any for months, or a drastic swing in pH (more than 1.5 units in either direction).
I like the strategy Essjay is trying to steer you towards - she is basically trying to set you up so you can get fish sooner rather than be stuck in cycle never-never-land forever. I absolutely agree that with the amount of bacteria you have established in your tank to date, coupled with a few fast-growing plants (If it were me choosing, I would get the water wisteria and the hornwort (but only if the hornwort looks okay, mine looked like crap in the store and isn't looking any better in my tank), and also the amazon sword plant since I think they're really pretty and bettas usually like to rest on their leaves), you should be able to start with one fish, and then gradually go from there.
you might still see some ammonia/nitrites when you add the fish, but at least you will have the fish to look at, and at least you will be moving forward on your aquarium journey, and at least you should have enough bacteria in your tank to very quickly finish the cycle at that point.