Yes they definitely can and I&#x27;ve battled them indoors myself but I&#x27;m thinking about the real high end grows that make the chances extremely low for pest invasion. Or any indoor grow in theory that doesn&#x27;t happen to have a bug problem where things like humidity, temp, watering, airflow, air quality, feeding etc. are all controlled for &quot;optimum&quot; growing conditions. Is it really optimum after all