that’s an interesting idea, though, i think if you just added observations with locations and times but no photos or such, those probably would end up being casual grade anyway and would not show up in most people’s default views anyway. if you went to each of these locations and captured original observations, i think that would be more in the spirit of iNaturalist, but if these trees are planted, they might end up casual grade still.
if the forestry department did have photos that could be loaded, i think i would load them under the department’s iNaturalist account rather than your own, since you would want the department to be shown as the owner of the photos.
i think iNaturalist ultimately pushes its data over to GBIF, and GBIF aggregates data from iNaturalist and other sources. so i wonder if it might make more sense to see if the forestry department’s data can be pushed to an aggregator GBIF instead of iNaturalist?