Hello everyone, Im a huge lavatera/hollyhock and hibiscus fan and currently have 2 lavatera in my garden one is Barnsley and the other hasn't got a label. I planted them both this year. My Dad use to have an entire wall of giant lavatera's growing along our garden boundary, they where the typical rose pink colour and attracted lots of insects but this was when I was a child and he can't remeber what type they were.
Can anyone tell me which types of shrubby lavatera are the hardiest in the uk? I have tried to grow coastal tree mallow L.Arborea for the last 4 years and havnt managed to get them to flower before the frost comes, I even saved them inside over winter and they just got massive this year and looked as though they would flower but didnt, I grow them in well drained full sun as which they apparently love! The frost will however stop them and turn them to mush again, would wrapping them in bubblewrap help?