They can <em><u>grow into any type of body cell.</u></em>
Explanation:
Stem cells are immature cell types- they are somatic cells, that contain the entire genome of an organism. The genome is made up of DNA, which encodes instructions for the cell.
These may potentially become various other types of cells through the process of differentiation and reach maturity. In differentiation, chemical signalling, and gene expression ultimately determine the cell's fate.
I think they will grow petter alone if they are not planted in the same pot. The one plant will absorb more nutrients from the soil it is planted in rather than if it was planted with another.