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: Mosser's division questions

:When I dig and divide my other iris late this summer, should I also divide
:the new increases on the damaged rhizomes?  If I do divide these, should I
:just separate them completely from each other, as well as, from any portion
:of last year's rhizome?

That's what I would do. There's no point in risking replanting partly
rotted tissue.

:Related questions:
:When I divide bearded iris, should I remove last year's portion of the
:rhizome, regardless of how healthy it might be?

I always discard the old rhizome, unless the increases are very small.
If the new rhizomes are large an healthy, they don't need the food from
the old one, which may carry disease or be an invitation to rot.
:Should each new division get a portion of the old rhizome if it is healthy?
I might do this if the increases were very small, but otherwise
I'd just break or cut them off from the mother rhizome at the narrowest
part of the join.

:Does a healthy older portion of the rhizome store food for the rest of the
:plant and increase bloom on the newest increases?
I don't know if this has been studied scientifically. I think the
conventional wisdom is that once the new increase is full-size and mature--
which it usually will be by digging time--its own root system is so
well developed that it does not draw sustenance from the mother rhizome
any more. Anyone know more about this?

:In the same vein, does dividing too often delay or deter first bloom on new
Commercial growers routinely divide each year. This apparently produces
the strongest rhizomes most likely to bloom the next season. I think
the *quality *of bloom seems to be best on a two-year-old clump, but I
don't think frequent division reduces the quantity of bloom in any
way. In fact it may increase it.

:If the older portion of the rhizome is still healthy can I plant this
:separately in a pot to force dormant buds on the old rhizome and increase
:stock of favorite varieties?


Happy irising, Tom.


Tom Tadfor Little         tlittle@lanl.gov  -or-  telp@Rt66.com
technical writer/editor   Los Alamos National Laboratory
Telperion Productions     http://www.rt66.com/~telp/

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