The Hewlett Packard Building 4A Roof & Patio Upgrade space was designed for optimal viewing and access. The plant material is Etera SEDUM TILE® custom grown with inserted plugs of perennials for added interest. The three mixes used are Color Max Mix with Escholzia californica Maritima & Achillea millefolium Paprika, Sun & Shade Mix with Fragaria chiloensis & Stipa tenuissima and All Seasons Mix with Thymus serphyllum Coccineum.

The Hewlett Packard Building 4A Roof & Patio Upgrade greenroof space was completed on September 2, 2011.