sounds bad. if its bud, sift throu for anyt that look ok and try pruning the mold of if possible.
DO NOT TAKE ANY UNNECCESSARY RISKS WITH THIS THO: A GRAVESTONE READING "SMOKED SOME OLD MOULDY-ASSED WEED AND DIED" JUST ISNT COOL


but the fact youv got bud left from last year means you must have some more lying round, or friends who owe back