'Mike' wrote:
I wonder if an aspirin dissolved in water would work (salicylic acid
and all that).
I seem to remember something about an Asprin in the water of cut flowers
keeps them going longer.

My mum used to put half an aspirin in the water when she had an orchid
(boxed orchid was a popular mothers' day present for some years). Not once
did her orchid flower have a heart attack.