If you have already added ammonia to the tank to start the fishless cycle process, I would not add plants. You would have to add a light for the plants, and ammonia plus light will give you lots of algae.
I have a planted tank and the fish died. Until I could get more fish, I added a few drops of ammonia every day to keep the bacteria colony alive. I got a lot of algae and ended up tearing down and scrubbing out the tank. My plan may have worked for a week or two, but I added ammonia like this for a few months. Your fishless cycle may take 4-6 weeks, so to add ammonia to the tank with plants and light for that length of time is going to produce lots of algae. I would wait until your fishless cycle is complete before adding plants.