MINE THAT ARE IN THE FROUND I RAISE UP ABOUT ONE AND A HALF INCHES EACH YEAR, MINE IN POTS.... WELL FOR ME IT DEPENDS ON THE TYPE POT I HAVE THEM IN, SOME ARE SO SHALLOW, THEYD FALL OVER IF I RAISED THEM UP, OTHERS I DO RAISE THEM UP A BIT. FOR ME IT'S ALL ABOUT CAUDEX. Ohh, sorry, I didn't realize I had the caps on.
