Liberal Democrat councillor Barbara Johnson has tweeted the news that the Hammond Arboretum at the Robert Smyth Academy, Burnmill Road, Market Harborough, is open to the public on Sunday.
It will be open between 2 and 4.30pm - adults £4, children free.
The tree expert, Owen Johnson, has described the collection there as being of national importance.
I visited it and blogged about it back in 2009:
When I heard that the Hammond Arboretum was going to be open to the public last Sunday I was keen to visit it. Because the last time I went there I got sent to the deputy head.