Looks like import of most seeds and plants is prohibited without a licence or permit.
https://suvarnabhumi.airportthai.co.th/service/airport-guide/detail/ProhibitedPlantforImport
My suggestion.
If you intend to bring a large sum of money into Thailand this year, just make sure that you are not a tax resident this year by spending less than 180 days in the Kingdom during 2025.