Over this winter I have to give credit where credit is due, and it goes to Polypodiums! They have been incredibly valuable during this cold quiet time in the garden, keeping their fronds green and sturdy through the hardest of frosts. They are now starting to turn brown, eventually losing these fronds to be replaced in late spring and summer by fresh new fronds; but with it being February and so many still looking so great, I am impressed. At Harlow Carr it’s been noted that the ones planted in the more sheltered and dryer locations have held their fronds still at their best. We have a small group under a large conifer, keeping them drier with dropped needles and some deciduous leaves nurturing the soil for their roots to creep through. And they are particularly beautiful when frosted, as the spectacular Polypodium cambricum ‘Richard Kayse’ and P. cambricum ‘Conwy’ have been seen this year.
Over the past two years at Harlow Carr we have been re-evaluating the Polypodium collection, identifying old ones and planting new ones. A lot of the credit goes to Julian Reed from the BPS, for help in identifying old varieties, where his knowledge was instrumental. It was also great fun for me to learn so much from him during the process. We have planted quite a few new ones this past year, so I’m looking forward to seeing how they grow over the next year! Some I am particularly excited about are the unique P. glycyrrhiza ‘Longicaudatum’ with long tail-like fronds, and P.cambricum ‘Macrostachyon’ with a stout basal frond. I expect there will be so many others, which I hope to share my enthusiasm for over the next year! https://www.rhs.org.uk/gardens/harlow-carr