don't want anything with deep roots near the concrete of the house, and I don't want to have to mow or do much maintenance up on top. Since we will have solar panels above the domes, I also don't want anything tall enough to obstruct light from them. The Buffalo and Buestem grasses should fit the ticket on all counts. Me "Hey 1911, what ya doing this weekend'? 1911-" have to mow the roof"...... Yea, I think seasonal wild flowers would look cool as hell. Stunning build man, too cool.