Mark recently sent me the following question regarding pruning rhododendrons via my Ask me a question page: "I have a number of large leaf Rhododendrons in my garden (Zone 5).  "How do you prune them so that they stay compact and full?" I am assuming that the Rhododendrons that Mark has are the Catawba types.  These include standbys such as 'English Roseum', 'Roseum Elegans', and ‘Nova Zembla’.  These are the most common type sold in the Midwest, besides the smaller leafed PJM types.  They … [Read more...]