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Live Fuel (Foilage) Moisture Content (Percent)

Moisture Content (%)

Stage of Vegetative Development

300

Fresh foliage, annuals developing early in the growing cycle

200

Maturing foliage, still developing, with full turgor

100

Mature foliage, new growth complete and comparable to older perennial foliage

50

Entering dormancy, coloration starting, some leaves may have dropped from stem; also indicative of drought conditions

<30

Completely cured (treat as dead fuels)
NOTE: Moisture content represents the weight of the fuel compared to its oven-dry weight.
Source: Fireline Handbook, Appendix B, Fire Behavior Supplement, NFES 2165 (PMS 410-1), 1989, page B-29.