Very severe fire may kill sheep sorrel. In New Brunswick a woodlot was clearcut in the fall of 1949 and prescribed burned in April 1951. In New Brunswick understory layers of 11 mixed hardwood stands representing an age sequence of 7 to 57 postfire years were examined. Sampling occurred in July and August 1973 and 1974. Fourteen sites were examined in June 1974 and June 1976.
Some research describes no change in cover or frequency in sheep sorrel after fire.
In California the effects of a late fall burn on a mountain meadow in Grover Hot Springs State Park were evaluated. In Connecticut experimental tracts were set up in a little bluestem grassland in 1967.