Michigan
State University Extension
Preserving
Food Safely - 01600822
10/13/97
Green tomatoes will usually ripen if they are removed
from the vine and wrapped individually in newspaper.
(Wrapping the tomatoes helps to prevent rotting and
provides the proper atmosphere for ripening to occur).
Allow tomatoes to ripen at room temperature or slightly
cooler. It may take awhile for totally green tomatoes to
ripen.
If at all possible, green tomatoes should be harvested
before the first frost. Green tomatoes hit by a light frost
should ripen if treated as outlined above. However, if they
are hit be a heavy frost, they will not ripen and should be
used as soon as possible in the green state.