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

Re: Evaluation Criteria

John asked a series of questions:  here's one response -- others will have
more to add.


As I understand it, you get one bloom stalk (sometimes with lots of
branches) per increase.
------> generally, you get one bloomstalk per increase, since that is 
the purpose for the increase. Branching, as generally used in regards to
iris, is on the bloomstalk itself, not determined by increases, but a 
desireable, but separate trait.

Not every increase will bloom the next season. (is there a general
----------> Correct. No doubt mother nature is trying to make the cultivar
survive by sending out more increases that do not bloom than those that
actually do bloom so that she can be sure there are more increases for 
the next season (she's pretty smart, but sometimes she decides that 
a cv should not survive, and allows no increases but only a bloomstalk and 
the rhizome will "bloom out". She's tough, mother nature is)

		A general percentage of increases that bloom would be a wonderful selling 
point, don't you think?  If this percentage could be predicted, we'd be
far advanced and hybridizers would have more money in their pockets, and 
all that. 
			I think there's no general predictable percentage, but the Judges' Handbook
says that a really good clump will have between 1/4 and 1/2 of the 
fans in bloom and this is what judges will look for.  Number of fans in bloom
 depends a great deal on cultural 
practises, too much nitrogen promotes foliage growth, and therefore, fewer

Is clumping slowley or fast(ly) (grin) the same or different from the
rate a mother generates increases?
--------> seems like the same thing to me. A clump of iris is the whole
group of rhizomes together. A clump should be separated every three years
to give the rhizomes a place to grow, and at the same time, a three year
old clump is in its prime and is the one to evaluate for number of bloomstalks
compared to number of fans for the 1/4 to 1/2 percentage called for.

If the rhizomes do not clump up fast, maybe a grower can separate the clump
less often than three years  -- an individual choice based on what's good
for the rhizomes.  Crowded clumps don't bloom as readily as well spaced
rhizomes do.

Sometimes, medians must be separated more often than TB's, since many clump
up very fastly.

Carolyn Schaffner in Buffalo, NY

 © 1995-2017 Mallorn Computing, Inc.All Rights Reserved.
Our Privacy Statement
Other Mailing lists | Author Index | Date Index | Subject Index | Thread Index