Posted: 16/06/2014 at 21:27
The yellow Heucheras I find dfficult.
I think yours get too much sun. I would plant in more shade.
Also, I think the moist clay is not ideal.
I have now planted Marmalade in a pot of mpc....mindful though of vine weevil in the autumn for which I will treat.
I was talking only a few days ago to a nurseryman.....nurserywoman.....about these yellow Heucheras and she too has trouble once they are planted out.