The Perennial Plant Association has named Allium ‘Milenium’ its 2018 Perennial Plant of the Year.         Like most alliums, ‘Milenium’ grows upright on a stiff stem topped by a perfectly round sphere of tiny flowers called umbels.  ‘Milenium’s’ are rose-purple and last for up to four weeks, much longer than many perennial plant flowers.  Better [Continue]