"The plants had been selected long before this was ever made public." So the plants we get to grow now are already to be found ingame, I assume. Looking at the current flora, subtracting what we already have available in the plant system, only a few possible candidates are left. Apart from a few grasses and flowers, these (see pic below) are the most decorative plants - IMHO. Maybe I should have left out the weed an the spider tree, just as I left out the other plants we got from the Clean Britannia tickets, but those two would be so nice to have a few of in a garden, so... Remember, this is pure speculation and may not be what we yet have to see.