Outdoor plants indoors

Zwolle, Netherlands(Zone 7a)

I want to bring some outdoor plants indoors ( all in pots and pretty much rootbound) , among them are a lemon grass species ( cymbopogon ) and a carex morrowi , almost all plants are reliable indoors and have robust constitution.

Both are outdoor plants and i know outdoor plants carry all kinds of pests my plan is to undo all soil from the roots, soak both plants in a large bucket with a pesticide ( pyrethrin and /or oil fatty acid based pesticides ) for 24 hours. get it out and spray it with a soap solution. i also will apply alcohol and other organic pesticides now and then

plants will be repotted isolated for 6 weeks and observed for any pests....

my living room already got a huge amount of plants ( large amount of $ ) i don't want pests roaming around

Will this be succesfull or is this a bad idea in general and i shouldn't bring them indoors ?

Contra Costa County, CA(Zone 9b)

Use something that is active against spider mites, if they are known in your area. Prevention is very important with this pest.

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