Im focusing on the mulching around the trees. No grass of plants can really grow there because the water is sucked up by the big trees. This would look great around my trees if they were smaller circles of mulch around the trees - Front Yard Ideas
When designing any plant bed, there are 3 main plants you'll want to focus on. Specimen plants (usually an ornamental tree), accent plants (roses or other shrub to provide color), and a key plant (larger tree/shrub to help house feel the right size).