Posted: 08/02/2015 at 11:47
Not all clematis benefit from being planted deep. In my experience the Viticella Group, Viorna Group, some of the ' herbaceous ' should be planted deeper.
Viticellas definitely need the crown burying 4 to 6 inches below ground.
I do not plant Atragene Group, Tangutica Group and many of the species deep.
This is why I asked ' Red Dahlia ' which cultivars had been planted.
Also I am concerned when Red Dahlia said he/she had followed the growers instructions, were these plants purchased from a grower ?