Bird Netting For Mulch . 2.3 out of 5 stars. The spray lasts 10 to 14 days. Bird Landscape Netting — Randolph Indoor and Outdoor Design from www.randolphsunoco.com 3.8 out of 5 stars 788. Various colors and weights are available. Gardeners need to be trained to leave an area in proper shape, even if it takes a little more time.