Rock rose looking VERY poorly

Hi
Total novice in the garden, I bought a young rock rose and duly planted in the garden but it has slowly turned all the leaves brown and crispy. I have read that this could be from not enough water but I have been watering it and we have also had a lot of rain lately!? Could there be any other reason for this happening? I planted a plant in the same position last year and this also died, could there be a disease in the soil maybe? Could/ should I feed the plant with anything to try and rescue it? The stems of the plant still look quite green but some have also turned brown.
Thanks in advance for any advice.

P.s. I will upload a picture of my plant when I get to a pc

 

here is a picture of the plant

 

as far as I remember reading (no own experience) they like it well drained, so maybe you had to much moisture, esp in the winter.
it does not mean that they should stand dry, but they don't like it quite moist
often the soil underneath the surface is moist but on top its dry, then no watering is necessary
I don't think it was soil ph /nutrient deficit because it would have slowly showed signs of discoloured leaves etc, but not totally brown..

 

How long has it been in the ground Laker as it could be frost damage. To be honest I think the plant is dead. You could try digging it up to see if there is any life in the roots, if so trim off alll the dead foliage and re-plant it to see if it puts up new shoots.