Question
Two weeks ago, I bought several one gallon dwarf papyrus plants and potted them, 2 each to a 1'w x 2'd container on my poolside patio.  I've noticed that the smaller leaves at the base of each are now yellowing, as if I am overwatering them - I thought that was impossible for this type of plant. I was watering them daily but stopped yesterday because I didn't want to kill them! Any suggestions?

Answer
I have never grown these lovely plants, but I do know that they grow quite well right in the water, so over watering doesn't seem to be logical. I would in fact, give them more water.
Two things they are very particular about are, full sun light, no shade, and warm temperatures. You didn't mention where you were growing them, but if you live in an area that is still experiencing cool nights, or  they are not getting a full day of sun, they may be complaining. If the sun is just hiting the top leaves, and not the lower ones, then, it is probably adjusting to the change in light. They are also sensitive to wind. Especially cold wind.

The older canes will die back, and turn yellow. Just cut them off, and new shoots will grow in their place.

I don't think it is insect damage, but it wouldn't hurt to check anyway. I am always on the look out when I bring home new plants. Aphids like to hitch a ride. Yellow leaves are a clue, along with sticky leaves, and a trail of ants.

I don't know what kind of potting soil you used, but that could be another place to look for problems. If they have been in the new soil two weeks, then they may not like it.
They like a nutrient rich soil, like would be found on the shores of a Mediteraniun water way.

You will need to bring in the outside divisions in the fall, when the temperature drops, and discard the older center of the plant every season. This will keep the plants going for many years.

bakerplanter