Depending on the type of                                                                                                                       
coat that your Griff has,  it's                                                                                                                       
 grooming requirements  will                                                                                                             
                                                                  (Rough coat, Smooth coat)
Smooth Griffons -
Smooths really require very little grooming. Brushing once a week with a
horsehair or similar brush will help encourage healthy skin and your griff will
enjoy it. Remember smooths do shed. Coats do vary, even in smooths. Some
smooths have very flat tight coats, like a Doberman or Whippet. These will shed
very little. Others have more dense coats like a Beagle or Pug and will shed
much more. Brushing with a slicker brush and combing can help.

Rough Griffons -
These coats can varying vastly from 1 to another. Some are very harsh
and grow slowly. These dogs will have shorter sparser beards and leg
furnishings. They will never mat and only need clippering, sometimes as
infrequently as 2 times a year.
The other extreme are dogs that have very dense soft coats. These coats grow
quickly. The dogs will have full dense beards and leg hair. They have a tendency
to mat, so you must brush there legs and beards weekly or more. These coats will
require clippering more often, some as often as every 6 weeks.
Coats vary from these extremes. Most typically, you can expect to need to have
your griff clippered every 10 - 16 weeks.

Of course, rough Griffs that are to be shown are never clippered. They must be
hand stripped.