4d George, perhaps, brought in posher ground plants (11) H-L-O-R-P-S I think it must be 'Heliotropes' but dont understand the george part of the question?
25a Millitary exercise: something fundamental, we hear, taking 31 days (5,5) -O-T-/M-R-H I'm thinking 'month march' or maybe route/march but very unconfident ?