My Rudbeckias have had a great 2nd summer, have now grown up to 60cm ish in height and have flowered like mad for at least a couple of months.
I'm just wondering how best to care for them over the winter? (in the UK midlands)
This RHS article doesn't mention pruning them back to the ground (or at all), so should I just leave them to look after themselves, or would some pruning protect and / or promote more growth next year?
Any other tips on keeping them happy and flowering would be appreciated.