I have two surviving seedlings from a packet I bought about 9 months ago and they are just starting to flower (it is late Spring here remember) - the first time I have grown it. Couldn't believe the blue! We have no frost problems here so I will leave them where they are. My question is how big can I expect the plants to become eventually if they are left alone? At the moment they are only about 6 inches tall and 3-4 inches across.