Huh????? Well I don't actually deadhead. Instead I livehead ( take the blooms off each evening.) I've been doing that here for oh....the past twenty years or so with no ill effects. It doesn't hurt them.
Am thinking that perhaps someone wrote that it can do harm to pull a spent scape off before it's turned brown. I follow the advice of a long gone hybridizer ( Ra Hansen) who used to say, "Tug gently and leave it if it isn't ready yet." That works. If they don't come with a gentle tug, you CAN do damage to the crown, so leave those.
