All our aquarium plants are exclusively sourced from within the EU (Denmark, Netherlands and Germany). These plants are not treated with pesticides and should be regarded as shrimp and invert safe.
Plants are only dangerous for shrimp when imported via routes outside of the EU since they need to be proven treated against pesticides before export and the issue of phytosanitary certificates. This is often the case for cheap bunched plants, as can be found on third-party marketplaces like eBay and Amazon.
As a general rule, you should still give new plants a quick rinse before planting to remove any possible contaminants and dirt.