
- University of California: Sonoma County Master Gardeners: Perennials: Top Perennials for Sonoma County
- Plant Lust: Michaelmas Daisy
- Cornell University: Growing Guide: Lavender
- University of California: Sonoma County Master Gardeners: Top Plants for Sonoma County: Lavendula spp.
- University of California: Sonoma County Master Gardeners: Top Plants for Sonoma County: Perovskia Atriplicifolia
- University of Georgia: The Trial Gardens at UGA: 2009 Trial Results: Perovskia Atriplicifolia “Taiga”
- Plant Lust: Perovskia atriplicifolia “Filigran”
- Fine Gardening: Genus Rosa (Rose)
- Santa Clarita Valley Rose Society: Types of Roses
- Santa Clarita Valley Rose Society: Fabulous Floribunda Roses
- Ryan McVay/Photodisc/Getty Images