Rainwater Harvesting for Drylands and Beyond by Brad Lancaster

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Thought Seeds

“Petrichor: The pleasant smell that accompanies the first rain after a dry spell. The smell is said to be a concoction of some 50 chemicals from dry plants that are trapped in the earth.”

-- Anu Garg

Vegetation

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Native plants for Tucson
Exotic & some native plants
Native plant & wildflower seed
Native plants and seed, & climate-appropriate exotic plants

The bulk, if not all, materials for creating most water-harvesting earthworks are already on-site and free. The soil is the main one. Rainwater Harvesting for Drylands, Volume 2, covers the rest. If you choose to import or buy vegetation, potential sources are listed below.

Note: Plants native to your site and extending to a 25-mile radius from and 500 foot elevation range above or below your site’s elevation are typically the best adapted to thrive on local rainfall alone. Check with local native plant societies for reputable nurseries and seed suppliers. For native or exotic plants, locally-owned plant nurseries and seed suppliers are typically the best since they know the area, the local plants, and more of the money you invest in them is more likely to recycle through the local economy.