>>32479242the four mons I mentioned are rare 'round these parts, so apart from a slight increase in Parases, the usual Bellsprouts and Oddishes are on normal levels.
Like yeah, depending on the biome this will either be a hit or miss, but like I've posted earlier, all the grass mons seem to spawn in more rural areas while the cities seem to be the same, so if you find this event to be useless then consider taking your bike and go somewhere with smaller pokestop density.