This is one of the few yellow/green variegated plants I welcome, Symphytum ‘Goldsmith’. Its colour, the foliage still very new this season, will calm down quite a bit from here, and make a sensible foil for the geraniums, Dicentra spectabilis, and ferns nearby. Its flowers are quite variable (ours are more or less white), but it is the foliage that has its chief impact. It does not grow or spread quite as vigorously as the wild comfrey (in this part of the country, S. tuberosum, not S. officinale), but even so, I give it the Chelsea chop, and subsequent chops, to which it responds very well, apart from making valuable compost. Like so many shade tolerant plants, it would really benefit from more water than we can provide, I suspect.