Welcome - risk of death

This is a welcome sign on approach to the delightful Alnwick Garden in Northumbria.  The garden has lots of attractions and features - the grand cascade waterfall which is it's signature feature, a giant treehouse with walkways and restaurant, the walled rose garden and so on.  But rather than those,  the feature being promoted on it's welcome board is the poison garden, a real feature in it's on right of course, but perhaps not making the warmest of welcomes.