Has anyone had any experience with these? This is my first winter with it and was wondering can it be left in the ground with heavy mulch or is it best lifted and potted in greenhouse?
My garden is located approx 1 mile from the sea (north Somerset) if this helps?
Thanks
Dahlia imperialis overwintering decision
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This area is for Reference and discussion of plant hardiness, overwintering methods and tips, and planr protection.
This area is for Reference and discussion of plant hardiness, overwintering methods and tips, and planr protection.
Re: Dahlia imperialis overwintering decision
'Montbeliardii' Don (GW) took his out.
Your best off looking at vid here
http://www.bbc.co.uk/programmes/b01nrcvs
For Dahlias
A tray -> newspaper -> gentle sprays of water->then store but watch for any rot, he waters when alsmost dry.
watch it.
Your best off looking at vid here
http://www.bbc.co.uk/programmes/b01nrcvs
For Dahlias
A tray -> newspaper -> gentle sprays of water->then store but watch for any rot, he waters when alsmost dry.
watch it.
- Dave Brown
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Re: Dahlia imperialis overwintering decision
Dahlia imperialis isn't going to fit into a tray Kata We're not talking standard Dahlia here.
It depends on what you are growing them for Ss77. If you want just big plants (7/8ft tall) then you can leave them out with a good mulch. However if you want flowers, then they need an early start.
Mine flowered in December last year from a Feb sowing, but it was a frost free autumn. In general they would be frosted before reaching a flowering, size, however, if retarted under glass in March/April will give you flowers in July/August.
Kevin Scales on fb cut his back to about 5ft then lifts before the frost, but it is a huge soilball and very heavy by the looks of it. He keeps tubbed over winter then plants out again after the last frost.
It depends on what you are growing them for Ss77. If you want just big plants (7/8ft tall) then you can leave them out with a good mulch. However if you want flowers, then they need an early start.
Mine flowered in December last year from a Feb sowing, but it was a frost free autumn. In general they would be frosted before reaching a flowering, size, however, if retarted under glass in March/April will give you flowers in July/August.
Kevin Scales on fb cut his back to about 5ft then lifts before the frost, but it is a huge soilball and very heavy by the looks of it. He keeps tubbed over winter then plants out again after the last frost.
Best regards
Dave
_________________________________________________
Roll on summer.....
http://www.hardytropicals.co.uk
Dave
_________________________________________________
Roll on summer.....
http://www.hardytropicals.co.uk
Re: Dahlia imperialis overwintering decision
Thanks dave, I was hoping you would say leave and mulch as space is a premium (I'm already using bedroom, spare room and kitchen! ).
Will do what you suggest and dig up and start in GH in march
Will do what you suggest and dig up and start in GH in march
Re: Dahlia imperialis overwintering decision
Don't lol at me DBDahlia imperialis isn't going to fit into a tray Kata
Okdokay, just watched it again...
Cut down, lifted, and brought in. Also you need a good 'HOT' summer for them to flower...'Montbeliardii' says.
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Re: Dahlia imperialis overwintering decision
kata wrote:Don't lol at me DBDahlia imperialis isn't going to fit into a tray Kata
Okdokay, just watched it again...
Cut down, lifted, and brought in. Also you need a good 'HOT' summer for them to flower...'Montbeliardii' says.
I was pleasantly surprised when 'Montbeliardii'_ showed off his Tree Dahlias.
Re: Dahlia imperialis overwintering decision
I had one left in the ground in a sheltered spot in my Midlands garden for several years. It never flowered but made good foliage. Harsh winter a couple of years ago finished it.
Incidentally I saw this in San Francisco Botanic Garden a few weeks ago - flowering like crazy - huge clump probably 2-3m high and across. It didn't look quite like D. imperialis foliage and seemed too tall for D. merckii or D. sherfii and beyond that I'm lost on pink species dahlias. Any ideas anyone?
Incidentally I saw this in San Francisco Botanic Garden a few weeks ago - flowering like crazy - huge clump probably 2-3m high and across. It didn't look quite like D. imperialis foliage and seemed too tall for D. merckii or D. sherfii and beyond that I'm lost on pink species dahlias. Any ideas anyone?
Re: Dahlia imperialis overwintering decision
They're lovely Ian but need the heat and sun, probably why yours died,
He did allow his to get frost hit before he cut it down.
He did allow his to get frost hit before he cut it down.
Re: Dahlia imperialis overwintering decision
Possibly DALIA TENUICAULIS?Ian Cooke wrote:I had one left in the ground in a sheltered spot in my Midlands garden for several years. It never flowered but made good foliage. Harsh winter a couple of years ago finished it.
Incidentally I saw this in San Francisco Botanic Garden a few weeks ago - flowering like crazy - huge clump probably 2-3m high and across. It didn't look quite like D. imperialis foliage and seemed too tall for D. merckii or D. sherfii and beyond that I'm lost on pink species dahlias. Any ideas anyone?
I am growing 2 plants both named as dahlia imperialis and they both look totally different. One is multi-stemmed, grows to about 2-3 meters tall and has pink, single and double flowers with yellow centres on the same plant.
The other one has a single more woody stem that sometimes branches. This hasn't flowered for me yet though.
The pink flowering dahlia stays in the ground with a straw mulch and a bit of fleece. The other dahlia will be dug up and potted and kept in our outhouse.
- Dave Brown
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Re: Dahlia imperialis overwintering decision
Here is a topic on Dahlia tenuicaulis
Dahlia imperialis comes from high altitude Central andSouth America. http://en.wikipedia.org/wiki/Dahlia_imperialis. It's leaves won't survive frost, but the stems are ok to maybe -2 or -3C, and the tubers to -6C if mulched. The advantage of their high altitude origin is that it loves our cool summers and is more than happy with the deluge we've had this year. Mine this year has really done well, although no flowers yet, and is currently around 3.5m (12ft)
Sorry, not a good picture as was taken at dusk, and is not easy to get far enough away to get a decent shot/
Dahlia imperialis comes from high altitude Central andSouth America. http://en.wikipedia.org/wiki/Dahlia_imperialis. It's leaves won't survive frost, but the stems are ok to maybe -2 or -3C, and the tubers to -6C if mulched. The advantage of their high altitude origin is that it loves our cool summers and is more than happy with the deluge we've had this year. Mine this year has really done well, although no flowers yet, and is currently around 3.5m (12ft)
Sorry, not a good picture as was taken at dusk, and is not easy to get far enough away to get a decent shot/
Best regards
Dave
_________________________________________________
Roll on summer.....
http://www.hardytropicals.co.uk
Dave
_________________________________________________
Roll on summer.....
http://www.hardytropicals.co.uk