Gunnera Manicata Leaves odd stuff

Whilst I was away on a 2 week holiday, my Gunnera Manicata plants have developed some unusual symptoms that I am unsure of how to deal with.

I've attached some images as I am completely unawares of what to do regarding this.

Spoiler: Images

 

Where are you, most Gunneras in the UK will be leafless now.
Have you got it indoors.

Looks like scorch or frost damage.

 

Cornwall, they are indoors yeah.

 

Air too dry indoors?

 

Not really a house plant IMO.
Better outside, but you better not put them outside now until the last frost in your area.

 

I don't got much of a garden really to put em in, but that was more or less my plan.

Seems like the problem might just sort itself over time with patience. Appreciate the thoughts.

 

You do know they get massive and like fairly wet conditions I assume.
You could grow one in a large tub for a year or so.

 

Gunnera manicata are a bog garden, pool marginal plant and they get huge; seriously huge.
See here Gunnera manicata | giant rhubarb Bogs/RHS Gardening and Gunnera I've tried both G magellenica and G prorepens, both small species; they lasted a couple of years here in Devon and then dry summers finished them off, they do need damp, humid conditions.
There are some superb examples at large gardens in Cornwall