March can still be cold.  The snowdrops, that were carpeting some areas are coming to an end.  But we know there are more spring flowers on their way. and winter, at long last, is coming to an end.
In April, the countryside is really beginning to wake up. 
May, in my mind, is one of the best months to visit the Cotswolds.   By now the grass should be growing strong and the hedgerows will be a delight of new green and white with blackthorn flowers – called May.
This is the time to see lots of lambs frolicking in the fields.