Here's why:
* Different climates have different growing seasons. Some regions have longer spring seasons than others.
* Some vegetables can be grown year-round in certain areas. For example, tomatoes and peppers might be spring vegetables in cooler climates but are grown year-round in warmer areas.
To answer your question more accurately, you'd need to specify a region or a particular vegetable.
For example:
* In a very cold climate, tomatoes might not be a spring vegetable. They might need to be started indoors and planted later in the season.
* In a tropical climate, broccoli might not be a spring vegetable. It might be grown year-round.
Let me know if you have a specific vegetable or location in mind, and I can help you figure out if it's a spring vegetable!