My hostas have finished for this year but we haven't had a frost yet. I was wondering at what temperature the leaves die back. Looked on net and can only find lowest survival temperature.
It varies for me according to variety. Some have gone yellow and soggy looking already and others still have strong foliage and even flowers.
What I do find makes a difference is cutting off the spent flower stalks immediately the flowers have finished so they send their energy to the foliage rather than making seeds. This works for me whether they're in pots or in the ground.
Vendée - 20kms from Atlantic coast.
"The price good men (and women) pay for indifference to public affairs is to be ruled by evil men (and women)."
I like the flowers as mine range from a perfumed white, through lilac to a deep purple and the bees and other pollinators love them too but I cut them off once spent.
Vendée - 20kms from Atlantic coast.
"The price good men (and women) pay for indifference to public affairs is to be ruled by evil men (and women)."
Have you tried nematodes for hostas Hosta? Are some in dedicated beds where nematodes could be very effective? good control for slugs but not snails though I think
Nematodes do work on the slugs around Hostas, but mostly it's little tiny snails on the leaves that do most damage, don't know if there is a nematode for those?
Think Dove is right.....their "dna" controls when they die down not temperature.
Have you tried nematodes for hostas Hosta? Are some in dedicated beds where nematodes could be very effective? good control for slugs but not snails though I think
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I imagine that it's not only to do with temperature but also to do with length of daylight hours.
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.
most of mine have gone yellow already, some are completely underground now.
I'm just about to move my pots to their winter shelter under the hedge.
I've got to lift and split mine this winter, flippin' 'undreds of them.
It varies for me according to variety. Some have gone yellow and soggy looking already and others still have strong foliage and even flowers.
What I do find makes a difference is cutting off the spent flower stalks immediately the flowers have finished so they send their energy to the foliage rather than making seeds. This works for me whether they're in pots or in the ground.
I like the flowers as mine range from a perfumed white, through lilac to a deep purple and the bees and other pollinators love them too but I cut them off once spent.
The few we have are still going strong. We are getting a lot more next year, not undreds mind just a dozen or so.
Have you tried nematodes for hostas Hosta? Are some in dedicated beds where nematodes could be very effective? good control for slugs but not snails though I think
Nematodes do work on the slugs around Hostas, but mostly it's little tiny snails on the leaves that do most damage, don't know if there is a nematode for those?
I have offered to do the digging for you, offer still there
of course, there will be a price 
i still have canna in pots!