Romneya

Louise Smith greenstems.smith@gmail.com
Tue, 01 Jan 2019 16:34:49 PST
Regarding the Romonea question. Isn't it possible that your plant is
playing catch-up after a tough first year. Romneya grows fine in Seattle in
full sun. It doesn't need watering after establishment but can't survive in
a well watered garden bed. Once established they thrive and prosper and
procreate. San jose should have perfect growing conditions. I have learned
the hard way that many plants be kept in pots until well rooted and planted
out in the fall. Don't give up.

Louise
Seattle

On Sun, Dec 30, 2018 at 10:39 PM Kipp McMichael <kimcmich@hotmail.com>
wrote:

> Greetings,
>
>   I have R. coulteri growing in my yard in Berkeley where it has not
> gotten any irrigation since the first 3 years of the clump's life.
>
>   I think Mike is correct - the plants must establish a deep root system
> for the plant to grow and survive summer. I have observed the plant growing
> in the multiple California natural areas where it cannot get summer
> irrigation - so it can survive both drought and high summer temperatures.
>
>   The plant I saw in the wild were small and sparse (5-10 stems < 3ft)
> compared to the leviathan the plant becomes when well-watered. For me, that
> was stems 10 feet tall with 100 stems. My front yard does not experience
> frost so the plant does not experience any winter-setback as it does in
> places with hard freezes.
>
> -|<ipp
> ________________________________
> From: pbs <pbs-bounces@lists.pacificbulbsociety.net> on behalf of Michael
> Mace <michaelcmace@gmail.com>
> Sent: Sunday, December 30, 2018 11:26 AM
> To: pbs@lists.pacificbulbsociety.net
> Subject: Re: [pbs] Romneya
>
> Leo wrote:
>
> >> As followup, the Matilija poppy (Romneya coulteri) I wrote about in the
> fall died within days of being in the 110+ F / 43+C weather, even kept in
> the shade and not allowed to go dry. I don't think the Sunset book is
> accurate when it says it thrives in All Zones.
>
> For what it's worth, I live in the proper climate for Romneya and struggle
> to get it to grow. I think it's very sensitive to soil and watering times.
>
> I planted it in my heavy clay soil and treated like a California native (no
> water in summer). It died within a year.
>
> So I planted it in an amended mound with good drainage, and pampered it
> with
> some supplemental water in summer. It died within a year.
>
> Finally in desperation I planted it on a slope in unamended clay soil, next
> to a native buckwheat that I planted at the same time. Both plants were
> given very occasional water in the first summer (maybe once a month). The
> buckwheat thrived, and the Romneya struggled through the first year. Since
> then it's been about three years and I haven't given either of them
> supplemental water at all. The buckwheat is very happy, and the Romneya is
> still alive. It puts up a couple of shoots a year that get about a foot
> (.3m) tall. No flowers yet. I figure if I leave it alone maybe it'll
> eventually establish itself and take off (I've had other plants do that).
>
> So, it can tolerate dryness all summer when in the ground. But getting it
> to
> thrive, rather than just survive, can be tricky.
>
> I suspect those freeway margins with huge masses of Romneya (some of which
> are near my house) are gravelly soil where the plants can establish more
> easily.
>
> Mike
> San Jose, CA
> (Zone 9, min temp 20F / -7C)
>
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