Romneya coulteri (non-Californian response)

Jack and Val vkmyrick@pacbell.net
Sun, 16 Sep 2018 13:06:06 PDT
Hi,

Californian here - Sierra Foothills at 2000 feet.  R. coulteri is hard to get established in our gardens but once it does, it can spread like wildfire!
We are told to plant it in the fall.  Winter rains take care of the watering and we are told not to water it after that.  We typically average 30 days above
100 F. and have no summer rain from June - Sept.  Martin, if your plant is still alive, you are doing great!

Val
Sonora, CA

> On Sep 15, 2018, at 11:45 PM, Garak <garak@code-garak.de> wrote:
> 
> Hi,
> 
> another non-californian answer: R. coultri is slowly starting to be offered in Germany, here with the winter being cited as the critical time. Mine was planted last year in the spring, had one flower the first year, so I thought: OK, give it time to establish. Winter was OK, plant lived through the unusually warm January, froze back to the ground in February but came back strong from the roots by beginning of April. That's when we had another weather anomaly, Summer starting right in late April (up to 29.7°C) and nearly no rain from then on up until a few weeks ago, which is highly unusual around here. I tried my best to keep everything watered (I expect my bill to shoot through the roof), but several plants I thought drought tolerant actually struggled. My Romneya only produced a bush of those nice silvery leaves (about 1m high, 1.5 m across) but never set flowers - I'm actually under the impression, it was too dry while too hot for it, average daytime maximum for June to August was around 30°C with 10 days reaching above 35°C.  So: was it wrong to water?
> 
> Greetings from Germany!
> Martin
> 
> Am 16.09.2018 um 01:46 schrieb penstemon:
>>> I ask Californians for some information on this huge poppy with some trepidation. It isn't in our photographs section. It doesn't have a bulb, just large tapering roots, like Ranunculus, which is in our Wiki. >However, it is Pacific, and it does come back in fall from a large underground water storage system.
>> 
>> For what it’s worth, Romneya coulteri is fairly commonly grown in gardens in Ireland, and in the U.K.
>> There are, or were, plants at Denver Botanic Gardens (on the south side of the alpine house).
>> 
>> 
>> Bob Nold
>> Denver, Colorado
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> 
> 
> -- 
> Martin
> ----------------------------------------------
> Southern Germany
> Likely zone 7a
> 
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