(My IKEA "ZZ" plant)
I currently own two "ZZ" Plants (Zamioculcas Zamiifolia), both of which I purchased about four months ago. I purchased one at a local plant nursery since it was the lowest price I had seen for a ZZ plant, but not too long after this I found a very beautiful and dark green ZZ plant at IKEA for five dollars and just had to have one.
(The new leaves unfolding...very cool.)
The IKEA ZZ plant at home did not appear to be changing much for the first month that I owned it, but in following couple of months it started to take off. There are now several new shoots starting to grow and the plant is growing so quickly that I will soon need to move it to a new and larger pot.
(The "uglier" ZZ plant from a local nursery...)
The plant from the nursery has been growing at my office at work and it looks decent, but it hasn't really changed much since I purchased it and the leaves aren't the same beautiful dark forest green as the other plant, they a much lighter shade of green as you can tell from the picture.
I wish I had purchased more plants from IKEA when I had the chance because in subsequent visits to the stores they have not had any for sale. Hopefully I will be able to find another one in the future.
The ZZ plant is by far one of the easiest houseplants that I have and it is a splendid plant with it's bright and shiny leaves.
Photo Credits: Me
Although your Zamioculcas zamiifolia appear different, they are the same species. The plant is an aroid and aroids as a group show a great deal of natural variability. The plant is from several vpimytord in Africa and it appears you are watering it properly, which is far more often than is generally recommended. Here is some of the science about the plant species and how it receives water in the wild:
http://www.exoticrainforest.com/Zamioculcas%20zamiifolia%20pc.html
Sorry for the crazy "word". My fingers must have gotten lost! Soughtl have been countries
All parts of the ZZ plant is toxic if ingested.
Ever see the variegated ZZ Plant? They are super nice, I own two of them, I live in NJ. BOught them from thailand on EBAY.
I also bought this plant from Ikea, despite my best efforts to kill it (being a negligent plant owner and not watering for months on end) it has continued to grow and thrive and I just had to repot it in floor sized plant pot. I just keep getting new and bigger shoots.