I kind of new that for roses but I guess my Q is can it harm my plant if the plant has no aphids on it or will it go after other vermin,thats what I'm hoping for probably wishfull thinking and it will just get ghost huh?if you have aphids yeah they eat them and the aphids eat your plants
Like I said she'll get ghost and she can get away.If there is no food (other insects) available for the ladybug then it will simply move on in search of food or just die if it cannot escape your grow area.
J