Mine's been in a pot for all these years. It could be stunted, or my 'guestimation; could be off. I'm not real good at guessing. I'll have to measure it this year. I looked up 'Sterling Star' online and the pictures do look like it. 'Sterling Star' doesn't ring a bell. But I thought 'Mont Blanc' rang a bell, it was wrong, so I don't think I can rely on memory.
Thank you for the help.