Semi Intensive Green Roof Plants

These vegetative green roofs are considered semi intensive due to the landscape design coupled with increased levels of maintenance.

Semi intensive green roof plants.

The greengrid system is a proprietary technology of weston in the u s. Semi intensive green roofs require a deeper soil layer but the payoff is in the types of plantings that can be used. Because this is the semi intensive level of the roof a variety of grasses bulbs and annuals were planted in the growing media mounds. Plants for intensive and semi intensive green roofs.

Grasses add texture and motion to the roof landscape and a habitat for birds and insects as they do in a traditional landscape. This system is able to retain more stormwater than an extensive system and provides the potential to host a richer ecology. In addition to the mosses grasses and sedum of extensive roofs semi intensive plantings include herbs flowering plants taller grasses and small shrubs. Semi intensive green roof a semi intensive green roof system is characterized by small herbaceous plants ground covers grasses and small shrubs requiring moderate maintenance and occasional irrigation.

A typical growing medium depth for a semi intensive green roof is 6 to 12 inches. Due to the differences in growing medium between an extensive and intensive green roof the latter can accommodate deeper plantings with more diversity. Depth of growing medium is typically 6 to 20 inches and can be planted with a large variety of plants. Try dry habitat perennials and ornamental grasses such as rudbeckia achillea potentilla armeria dianthus helictotrichon sempervirens stipa tenuissima and even bulbs such as muscari or small allium species such as allium flavum and a.

Typical sizes include quarts 12 per flat 3 24 per flat 38s 38 per flat and 72s 72 per flat. An intensive green roof is more like a conventional garden or park and can have virtually no limit to the plant types that can be used. Plugs are small plants that have been grown in a nursery and are planted into the green roof media on the roof.