Just bought a new house in Manoa and it has a steep hill in backyard. Ive only been here for 1 month but thus far we get rain and wind daily. The hill currently has mainly grass but I'm looking for something that is low maintenance. Of these 3 choices, which would establish and choke out the grass with the least amount of on going maintenance? The bottom of the hill goes into my neighbors so i might need to trim any overgrowth. Hearts and flowers, Spanish Shawl, or Wedilia? Also, I think there might be some Spanish Shawl planted already, can someone confirm? See photo. Thanks everyone! New house is a lot of work, trying to reduce this piece of it!