Ladybugs can get aphids anywhere! I haven't sprayed anything in years & now the good bugs frequent my yard. Between the ladybugs and ghost spiders I don't think I've seen a single aphid in my garden this year!
Try to be patient. It may take a few years for the good bugs to find you but when they do you won't have to do anything. Also, ladybugs won't come if you kill off all the aphids. It often takes a couple of weeks after you see an explosion of aphids to attract their predators.
