For what it's worth, I've been following up several different strands,which have not yet produced the total result,but --- who
knows? --- two minds are better than one etc.
1."evening" as first word for flower (e.g. primrose) can be seen as even (letters=every second one) in G(azza or Gascoigne)
2."Prim" in primrose = neat
3."Officina" (for many flowers,=used pharmaceutically):cina is an anagram of acin,the even letters of Gascoigne
4.Sundrops ends in Ops = army plan
5.Your Primula Auricula contains several letters of "calculate" = plan
I realize this may all turn out to be useless,but thought I would broadcast some new ideas at least if nobody has been able to find the answer yet.
Am I right in supposing the thing has to be in by the end of the month?