This question already has an answer here:
- How does the bounty system work? 1 answer
Is it possible to start a bounty sooner than the minimum?
I have seen 0 activity in my question and I think I could benefit from a bounty
No, that is not possible. But you can do something else:
Edit your question. By doing so, It will be pushed in the active questions queue. When editing your question keep in mind:
* Many users watch their favorite tags
No, you must wait the minimum 2 days before setting a bounty.
There is a 2 day minimum on starting a bounty as when a question is new, it already shows up decently high in the tag page and on the new questions list.