Why isn't my clematis growing/flowering this year?
I have had Clematis Lunar Lass for about four years now. It was staked in a pot when I bought it. I removed the stake and planted it next to a trellis against a wall in the sunniest spot in the garden. It didn't grow very much so after a couple of years I re-planted it in a large square container in sun/semi-shade with something to climb up. It had a few flowers last year but little growth. This year, no flowers and little growth yet the label says when fully grown it should reach 3 metres. What am I doing wrong?