I know it’s a bit previous, but as part of the Free lectures at Gresham College next year there’s some interesting ones in the Mondays at One – Garden and Gardeners series.

There’s Wildlife Gardening on March 7th 2016, Chelsea Physic Garden through the Ages on March 14th and Gardening Entrepreneurs on 21st March. 

They all start at 1pm at Barnard’s Inn Hall and run on a “first come, first served” basis and doors open half an hour before the event to get that seat near the front (and avoid the one in front of the pillar.) Stick these in your diary if you love a talk!