This post is a more technical but important to understand turfgrass water usage.
This information is based on the research of J. B. Beard in 1973. It dealt with the total amount of water used for growth plus that lost by transpiration and evaporation from plant and soil surfaces. May or may not be related to drought resistance.
RelativeET Ranking | mm day-1 | Example |
Very low | < 4.0 | |
Low | 4.0-4.9 | Kentucky bluegrass, buffalograss |
Medium-low | 5.0-5.9 | |
Medium | 6.0-6.9 | |
Medium-high | 7.0-7.9 | |
High | 8.0-8.9 | |
Very high | >9.0 | Tall fescue |
Turfgrass Species (Common Scientific Name) | ET* Rates | (mm day-1) |
Tall Fescue (Festuca arundinacea) | 7-13 | 2.0-3.8 inches/week |
Perennial Ryegrass (Lolium perenne) | 7-11 | |
St. Augustinegrass (Stenotaphrum secundatum) | 6-11 | |
Seashore Paspalum (Paspalum vaginatum) | 6-8 | |
Bahiagrass (Paspalum notatum) | 6-8 | |
Kikuyugrass (Pennisetum clandestinum) | 6-9 | |
Creeping Bentgrass (Agrostis Palustris) | 6-10 | |
Centipedegrass (Eremochloa ophiuroides) | 5-9 | |
Bermudagrass (Cynodon spp.) | 4-9 | |
Zoysiagrass (Zoysia spp.) | 5-8 | |
Kentucky Bluegrass (Poa pratensis) | 4-7 | |
Buffalograss (Buchloe dactyloides) | 3-6 | 0.8-2.0 inches/week |
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