Days for the grass. Some timber types have natural seedlings the next fall. A lot is dependent on just how hot the fire burned. Heavy fuel loading leading to longer burn duration cooks more of the nutrients out of the soil.
Great pics dennis. Good to see some real stuff.
I walked a few miles of the 2002 Haymen fire remains , pure moonscape!
That one sterilized the ground, in spots, you can tell those areas by the holes the burnt out roots leeve in the ground!
Burnt 60,000 acres in one day, and in 20 days burnt 138,000 acres and burnt 133 homes and ranches a couple were friends of mine.
LINK
Here is a not as burnt area a few years later: