I'm not sure how the switch grass will do with limited sunlight. Switch grass and big blue stem are 2 of the taller varieties of warm season grass. For an experimental plot like that,,the big blue stem is alittle cheaper to buy. It is'nt quite as durable in the standability department,,but in an area with a wind shelter like the trees should provide, it might not be an issue. Hayze is right on the soil ph,,it is'nt nearly as critical with wsg as most other grasses and legumes. Be prepared to mix your seed with sand or floor dry if your going to broadcast it,,,,wsg seed is like feathers. You can find debearded seed at a premium price,,but it is tiny with all the fluff gone off of it. The up side is,,if your looking for bedding cover that deer really like your on the right track. We have a couple of old foodplots that we cleared in cedar groves, that the volunteer little blue stem took over,,,the deer really use them heavy for bedding cover.