Here are 11 ways to do this.
1. Like photos in your niche, network and industry
2. Create a standard theme for your photos that customers will use to relate or recognize your brand
3. Socialize; comment, like and share other people's photos
4. Create a hashtag for your brand and encourage others to use it
5. Run an online contest
6. Use those Instagram stories
7. Create post that encourage followers to take action
8. Geotag your post. Add those locations!
9. Figure out what your audience likes and work with them
10. Link your Instagram account to your other social media accounts
11. Approach other influencers to collaborate
Try these out, we are sure they will help you organically grow your followers.