hort.net Seasonal photo, (c) 2006 Christopher P. Lindsey, All Rights Reserved: do not copy
articles | gallery of plants | blog | tech blog | plant profiles | patents | mailing lists | top stories | links | shorturl service | tom clothier's archive0
Gallery of Plants
Tech Blog
Plant Profiles
Mailing Lists
    Search ALL lists
    Search help
    Subscription info
Top Stories
sHORTurl service
Tom Clothier's Archive
 Top Stories
New Trillium species discovered

Disease could hit Britain's trees hard

Ten of the best snowdrop cultivars

Plant protein database helps identify plant gene functions

Dendroclimatologists record history through trees

Potato beetle could be thwarted through gene manipulation

Hawaii expands coffee farm quarantine

Study explains flower petal loss

RSS story archive



Hi Beverly

Here in South Australia, there are many iris growers, mostly bearded which grow very well here. We are basically a zone 9/10, with soil pHs ranging from below 6 to over 8.5. We find that some irises, partic later and darker varieties, benefit from some afternoon shade.
Also the trick is to ensure that they get cold enough in winter and are not near heat retaining walls and paths. Full shade in winter is good.
However when we have heatwaves here (over 100oF, 37oC, often for 5-10 days) the humidity is very low, typically less than 20%. So our summers are very hot and dry, with very little rain, similar to southern California.
I'm wondering if the problem in Houston is too much summer humidity, coupled with insufficient winter cooling.
Also the rhizomes benefit from being covered by a half to an inch of soil.
Remember as cold as possible in winter and hot and dry in summer, with drip watering only once every 2-3 weeks .

Colleen Modra
South Australia.

Beverly Robinson wrote:


Marge, I live just east of Houston, TX. As I mentioned, I do have two
irises that grow and bloom here. I also have other iris plants that I
believe are TB but although they grow they haven't bloomed as yet and
I have had them for several years. Maybe I am like your "south of the
border" friends whose irises don't do well. I don't think it has to
do with my soil as I grow anything in the Amaryllis family, daylilies
and other common flowering plants. It does get hot here. Today it is
near 100 and we desperately need rain.
I look at the pictures you and other growers show and I just about die
wishing I could grow them. Thanks for your reply.
Beverly Robinson

On Sat, Jul 18, 2009 at 1:50 AM, Margie Valenzuela<IrisLady@comcast.net> wrote:
> Hi Beverly, I'm in zone 9 also, specifically 9a. I really haven't had much
> trouble growing tall bearded irises here. The summers are tough on the
> irises here, but otherwise they do very well. There are many Arizona (zone
> 9) iris growers. What state/country are you in? I've heard just south of our
> border (like in Mexico - an hours drive away) tall beardeds are hard to
> grow. A few will, but not many. I'm not sure why.
> In your situation - I wonder if it's the PH of your soil?? Possibly a soil
> test would be a good idea.
> ~ Margie V.
> Oro Valley, AZ.
> ----- Original Message -----
> From: Beverly Robinson
> To: iris-photos@yahoogroups.com
> Sent: Friday, July 17, 2009 3:53 PM
> Subject: Re: [iris-photos] TB Photo: GUATEMALA
> Hi Margie: What ag. zone are you in? I would love to grow "regular"
> irises but my zone (9) seems to preclude anything but Spurias, Dietes,
> Ungulacaris, etc. I do have a yellow iris, TB, that blooms very early
> here and a purple that blooms a little later. The pictures many
> publish just make me drool but I know I cannot grow them. Thanks
> Beverly A.
> On Thu, Jul 16, 2009 at 12:48 AM, Margie Valenzuela<IrisLady@comcast.net>
> wrote:
>> This is GUATEMALA................A 2005 Tom Johnson Introduction. Unusual.
>> It is listed as an early bloomer, but it blooms mid-season for me.  It
>> could
>> be that it just seems to be a midseason bloomer to me, because I'm working
>> with quite a few V VE, VE to E varieties in my crosses. Our weather is
>> usually warm enough to have irises bloom in late February, or early March,
>> but there are just not many of those V VE irises that exist. Part of my
>> hybridizing efforts is to create more of these irises so those of us in
>> the
>> warm southern states can experience a longer bloom season. The biggest
>> drawback for introducing irises that bloom this early in the season is
>> that
>> many of them are usually long past 'their bloom season' by the time the
>> Iris
>> Treks or AIS Conventions are in full swing. So <alas> they are rarely seen
>> by the public.
>> ~ Margie V.
>> Oro Valley, AZ.
> --
> Wild Ginger Software Certified Educator

Wild Ginger Software Certified Educator

Other Mailing lists | Author Index | Date Index | Subject Index | Thread Index

 © 1995-2017 Mallorn Computing, Inc.All Rights Reserved.
Our Privacy Statement