Simplify the following text for a Grade 7 native English-speaking person.
Original: The islands ' position produces a place of great contrastâ '' the ameliorating effect of the sea means they rarely have frost or snow , which allows local farmers to grow flowers well ahead of those in mainland Britain .
Simplified: The islands ' position produces a place of great contrastâ '' the warming effect of the sea means they rarely have frost or snow . This allows local farmers to grow flowers well ahead of those in mainland Britain .