Posted: 08/08/2016 at 21:13
Asclepias are too tender for us here. They just die in winter as do Echinacea.
Already got Hellebores in it and Sedums. Lots of Alliums too. Muscari are a total no no. Spend as much time digging them out as I do any other weed,
Primroses and Cowslips flower at the same time as the Fruit trees, so not really much use to extend the season.
Geranium phaeum is as big a weed for us as ground elder. Terrible stuff, self seeds all over the place.
Thanks folks, Keep them coming. As you can see I have been thinking about it for a while and everything I came up with could be dismissed for one reason or another, mainly on height and time of flowering.