In mild areas dahlias can be left in the ground, so it depends where you live and what your soil and climate are like as to what you do with them. They can be grown from seed, or from the tubers that form, and also cuttings from those tubers. Very versatile plants - and hundreds of varieties to choose from
It's a place where beautiful isn't enough of a word....
I live in west central Scotland - not where that photo is...
I'm in the Midlands - Northampton - Irises tubers survive the cold where I am - does this mean Dahlia would be ok - I think these are just beautiful and would fill a border with them if I thought they would survive ok?
Iris are much hardier than dahlias. I grow Bishops Children from seed most years to fill in gaps where the odd tuber didn't make it through winter, but most do here in Essex. You can always put some compost on top of them before winter sets in to give them insulation Here's one I sowed in March 2020 It's about 3ft this year and made it through the icy -6c blast we had earlier this year as did most of the others
Billericay - Essex
Knowledge is knowing that a tomato is a fruit. Wisdom is not putting it in a fruit salad.
As @Pete.8 says - Irises are different - totally hardy
Dahlias don't like cold, wet especially. They can't cope here. If you only get some occasional frost, or only have light frosts, but with drier soil, and a mulch as described, they might be fine where you are. We get too much frost and ice, even in mild winters, so I'd always have to lift them to be sure of getting them through winter. You could always experiment a bit to see what works for you.
It's a place where beautiful isn't enough of a word....
I live in west central Scotland - not where that photo is...
Because the bed is higher than the pavement level, it's probably quite well-drained which will help the dahlia survive the winter if you leave it in the ground. My Bishop's Children dahlias come through the winter in the ground here and I'm a bit further north than you (sandy well-drained soil).
Doncaster, South Yorkshire. Soil type: sandy, well-drained
Posts
Not sure which one, might be one of the Bishop's children series.
When you don't even know who's in the team
S.Yorkshire/Derbyshire border
It could be Bishop of York
It could be from a packet of mixed Bishops Children seeds - I often get that colour along with the hot reds and oranges.
https://www.gardenersworld.com/plants/dahlia-bishop-of-york/
Billericay - Essex
Knowledge is knowing that a tomato is a fruit.
Wisdom is not putting it in a fruit salad.
They can be grown from seed, or from the tubers that form, and also cuttings from those tubers.
Very versatile plants - and hundreds of varieties to choose from
I live in west central Scotland - not where that photo is...
I grow Bishops Children from seed most years to fill in gaps where the odd tuber didn't make it through winter, but most do here in Essex.
You can always put some compost on top of them before winter sets in to give them insulation
Here's one I sowed in March 2020 It's about 3ft this year and made it through the icy -6c blast we had earlier this year as did most of the others
Billericay - Essex
Knowledge is knowing that a tomato is a fruit.
Wisdom is not putting it in a fruit salad.
Dahlias don't like cold, wet especially. They can't cope here.
If you only get some occasional frost, or only have light frosts, but with drier soil, and a mulch as described, they might be fine where you are. We get too much frost and ice, even in mild winters, so I'd always have to lift them to be sure of getting them through winter.
You could always experiment a bit to see what works for you.
I live in west central Scotland - not where that photo is...