Re: sunlight tolerance

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From my limited knowledge of sun rays and angles, there is the issue of the further north one is the stronger the sun in the summer.  My area also hits 40 degrees at times in the summer.  Although not super cold in winter, less these days than previous decades.  -15 C for short periods is usually the coldest now.

Yana

At 11:02 AM 4/28/2015, you wrote:

 

Dennis,
     Iris tectorum can tolerate some direct sun, but I am not sure how much.  Last year I put some in full sun and it scorched during a span of time we didn't get our normal summer afternoon convection formation. 
     It has done fine in a spot that gets direct sun from about 2:00 PM forward.  Remember I am at 29 N Latitude.  Across the Atlantic, that would be the same as southern Morocco.  Across North America, that latitude would be equal to Hermosillo in Mexico.

Mark A. Cook
Dunnellon, Florida USA     
AHS Region 12    USDA Zone 8b

On Tue, Apr 28, 2015 at 1:47 PM, Dennis Kramb d*@badbear.com [iris-species] <i*@yahoogroups.com> wrote:

How much sunlight can Iris tectorum tolerate?  I've always grown it shaded alongside Iris foetidissima.  Can it take full sun?  I'm quickly running out of shady places to plant new things, so I'll either have to create a new bed with a sunscreen, or try my new tectorum seedlings in full sun.

How much sunlight can Iris graminea tolerate?  I grew it under an oak tree where it was fairly heavily shaded in summertime.  Last fall I limbed up that tree, and now the graminea will get almost full sun. 

Dennis in Cincinnati

Yana Maltais
yanam@shaw.ca