Freddy from North Attleboro Massachusetts writes
Black/purple spots on roses
Hey guys, will this stuff work on black/purple spots on the stems of knockout roses?
Answer:
Bonide Liquid Copper Fungicide Concentrate is applied as directed at 1.44 fl oz per gallon for black spot on roses. For full instructions, you can find the label here.
Answer last updated on: 04/26/2023
