By Wendygrocott
Staffordshire,
United Kingdom 
Thanks for the replies we have pinched out in the past the smallest we can get is 15 /18 inches, Asked at the local garden centre why the parks dept plants so small they said they use an inhibitor but what its called we don't know and they are hybrid seeds.
5 May, 2010
Previous question
Wendy as this is a response to a question you have already asked if you post it as a comment on the original question it will be easier to follow.
5 May, 2010