m0useanswered grow question 2 years ago What you're describing is something commonly called "Companion Planting"
Indoors I don't know a lot of benefits but outdoors there are tons, as some plant will bring in beneficial predators to help control pests and other can help provide nutrients when they die and get mixed into the medium then decompose like clover. or they can provide ground cover to help prevent splash back. something like creeping thyme will do this or grass. Its good to note that the additional plants can also cause issues with root space/drainage and resource management/fertilizer requirements in smaller plots. Not a lot of plants are as heavy feeding as cannabis so the extra nutrients they eat can burn the companion plants. Looks into it and try some stuff out.
Good Luck!