Hi Susie,yes my weyerianas are still flowering strongly now too. I suppose it makes sense to have a mixture of
weyeriana and
davidii,based on its flowering time alone,and there also seems to be a picture of other insects such as bees and hoverflies maybe going on the
weyeriana,whilst the butterflies prefer the
davidii . I dont think that I can go wrong by keeping them both ,it would seem though.