system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How can grocery stores get ripe fruits of all types every single week of the year?

I understand that fruit can get sent by air all the way from Chile to the United States when it is winter in the U.S.  But even within the Northern or Southern hemisphere, it seems that harvest season is going to vary by latitude.  So, the regions in which cherries, or apples, or tomatoes, etc. are ready for picking will continuously vary every week.  How can grocery store suppliers constantly vary where they source their ripe fruit every single week of the year?  How can they have relationships with so many farmers in so many regions and even countries?  Is there a website farmers can use to tell suppliers all over the world when their fruits are ripe?
gpt
About apples specifically, they're harvested when they're in season, before they're actually ripe, then kept in cold storage for most of the year and released in batches. The low-oxygen, cold warehouse keeps them from ripening until they're ready to be sold.