To establish a robust natural fly defense against a swarm, what placement strategy is advised over scattering single pots thinly?

Answer

Grouping plants into dense clusters

A key to success is concentration. Grouping different herbs into dense clusters creates a far more potent scent barrier that helps overcome ambient air currents compared to scattering single pots thinly.

To establish a robust natural fly defense against a swarm, what placement strategy is advised over scattering single pots thinly?
plantinsectrepellentHerbFly