Home-made spray for blackfly
Not sure if I read it on here or if I'm just making it up - horticultural soap and neem oil for blackfly? Does horticultural soap actually exist, or does washing up liquid do the job? Can't deal with all that wiping off by hand, can't even squish greenfly, makes me heave 🤢. Plus they're on the underside of my Rheum Palmatum and a pain in the a*** to get at.
It's knowing what to do with things that counts - Robert Frost