From my perspective, the wasps were not a problem; it was just an observation. But it is subjective, of course.
Actually, I would have thought it easier to propagate from pieces of rhizome.
I wonder if you will notice wasps on it in future, now I've primed your observations.
I've walked past a few times now Mike and havent seen any wasps at all. Maybe your experience was a one off, or they were close by having been attracted to something else.
Just in case I'll steer clear........anyone who wants wasps and slugs in their garden is welcome to them .
Thanks for your feedback.
My observation about wasps relates to these plants in various parts of Surrey and Hampshire.
Maybe it is a time of year thing. This link suggests it may be late-season behaviour
- http://www.specialperennials.com/Gardens/wasps.htm (note also how wasps eat greenfly)
At least I am not alone:
'...I grow persicaria firetail and it soon develops into a really strong plant and spreads,... The strange thing is that the persicaria seems to attract wasps by the dozen.....has anyone else had this problem??'
'Don't know if that is peculiar to P. firetail Andrea. I've certainly never noticed it with Red dragon and, being allergic to wasp stings I think I would.'
'...no Andrea I dont get wasps attracted to my firetail.'
I've just come upon this discussion. I've had a P. amplexicaulis for some years now, and it has indeed attracted both bees and wasps in some numbers. But in 2013 and 2014 it has been frequestend by fewer bees and no wasps, rather to my alarm. The insects are on the plant only in the mornings and by around noon they are all gone. The wasps are no problem at all - I don't think you are any more likely to be stung by a nectar-seeking wasp than you are by a bee. Certainly it has never happened to a member of my family.
But the wasps do take aphids and caterpillars to feed their grubs. They are, of couse, more than welcome to the aphids, but the moths and butterflies in this area (NW London) seem to be in even more serious a declinet than are the bumble bees. If the wasps are to go into decline then that is another new factor in the loss of balance in our native insect populations. I am afraid that the result of this may prove unfavourable from our point of view.
Message was edited by: MichaelB