I'm looking for guidance on using seed to establish native, emergent communities at a restoration site in western Washington. The area to be seeded consists of cut areas that will be scraped down 6" to 1' (to aid in hydrology target) or will be 'fill' areas in which ditches are being filled. The site is currently a degraded, seasonal wetland dominated by pasture grasses (pretty typical pasture wetland). Weeds will be treated for two seasons prior, but of course some competition from weeds will result in a mixed native and non-native mosaic.
My main questions are: What to do about erosion control, since sedges etc. will need to remain uncovered to germinate (thus straw is out)?
Has anyone found species that will come up in the fall?
Please provide your case studies and experiences