Posted: 15/12/2013 at 08:57
Angela is correct. I do this too. However, the drench DOES work. Yes it is expensive. If you dig up your Heucheras scour the surrounding soil too for those grubs. I excavate as much soil as poss and place it on tray or bin or similar and sift through it. Bear in mind there will be eggs there too so you will have to repeat this process next spring. I do this to primroses, polyanthus etc
Red dahlia, you can easily divide your plants.....in fact they benefit from it. Lift and pull apart. Wash them thoroughly. Pot up and plant deeply. Next year you will have your Heucheras back again but in greater numbers
If it's just dying and browning leaves remove them. Slightly tug at your Heuchera. If it comes away from the soil it will definitely be vine weevil. If the centre of your plant looks ok....I.e. healthy ...then leave well alone.
Heucheras do look fantastic and then suddenly, it seems, look awful. Nature of the beast