[Teabag]

The local green grocers has aspararagus plants for sale ,is it ok to plant them at this time of year ?,any advice very welcome.

[Trillium]

Yes they can be planted now as you can't harvest them for about 3 years. Check that the roots are plump and numerous, otherwise, pass on them.
Here are some previous tips:

http://chat.allotment-garden.org/index.php?topic=26812.0

[Teabag]

Thanks for that Trillium