All of the right things come together to make the fruit or the vegetables or whatever the miracle happens to be.
Just think about it. When the conditions are off the end product is as well. Then we have to get oranges from overseas or items sourced from somewhere other than the usual place.
Things need to line up. And many of those things are unpredictable. And if they are not unpredictable they may be uncontrollable like the weather.