On 24/10/2012 20:07, Christina Websell wrote:
"Mitulove" wrote in message
...

Hello,

Yesterday I saw that the poor mildew-infested perennial sweet peas I
potted on and put in the conservatory were also covered in aphids. I
took them outside and squirted them down with organic bug spray (the
fatty acid sort). Then I had the bright idea of actually reading the
bottle and it specifically says, 'not for use on sweet peas or
begonias.' I can't tell yet if the sweet peas particularly care or not
that I poisoned them. Does anyone know why the spray is not
recommended? I find it odd since the bottle does say you can spray them
on edible peas..

Next time RTFM.

It may well be because it will mark the flowers.
But if in doubt then cut them back to the ground, they will be making
new growth next spring.