Hi Dave and welcome to GoY, tropaeolum speciosum either loves you or hates you and wont grow at all. Can you tell us how you have been growing.

fabulous if your lucky enough to get one going, the divided root fetch a high price,around £6 per ryzone` sandy light soils seem to be the anwser buy a bag of john innes compost, it dries out better, wet dry, wet dry,conditions often work with ryzone roots

Thanks to those who responded. Will try your tips. At present my plant is growing in quite dry conditions. Perhaps this is part of the problem. Thanks once again.