If the growth is not too weak, you may want to consider propagating new plants from cuttings taken from larger specimens. You will not only have more plants, but come spring, the new offspring will probably be stronger and of better quality than the parent. Cuttings are an ideal means of propagating house plants since the new plants will be exactly like the parents from which they were taken.
Cuttings made from the stems are probably the most reliable and fastest way of propagating plants.
Since there are no seeds involved with this method it is called asexual propagation. Before taking any cuttings from the plants, you first asemble all the materials needed for the operation. A rooting medium consisting of equal parts by volume of peat moss, coarse sand and perlite by volume would be a good first choice for most plants. Fill small containers or flowerpots with the rooting mixture and soak with water before setting the cuttings. Allow all excess water to drain from the medium through drain holes in the container.