The story of what happened to Applejack's parents isn't exactly clear, but we can tell that she is extremely concerned with safety. She forces her little sister to wear a helmet and puts nets underneath the apple trees. These are all indications that something bad has happened to her parents and it might be a hint that they died in some way.
Applejack's cutie mark is three red apples on her haunch. She also has light-orange fur, yellow ponytailed tail and mane. Her eyes are green and her cheeks are white with freckles.
When Applejack first came to Canterlot, she was a young pony. Her cutie mark is three red apples on her haunch and she has light-orange fur, yellow ponytailed hair and mane.
She has green eyes and she's a bit of a jerk sometimes, but she's always been a very good girl. She is a hard worker and always tries her best to do her job well.
The answer to this question is not yet known, but there are a few possible theories. The most common one is that Pear Butter died giving birth to Apple Bloom.
I know that this sounds a lot like what happened to Fluttershy, but I don't want to ruin the surprise for anyone reading this, so I will keep it vague.
What I am trying to say is that this has been a mystery for years, and it's not as if it wasn't a big part of the show. Eventually Apple Family Reunion brought it all to a close, but it was still a big story that was left hanging. It's a shame, because it would have been interesting to see Applejack's parents come back.