I would say there's a few factors that can assist:
1. Content: you need high quality content that engages your audience. Generally, photos that are high quality and often, the use of lightroom presents helps this.
2. Targeted hashtags - don't over-do it
3. Network with others, aim to get your page shared on others stories etc. Tag other accounts that are relevant in your photos.
4. Travel follow for follow loop events.
5. Buying followers - generally, these aren't active followers so artificially inflate your numbers.