This is a public-interest archive. Personal data is pseudonymized and retained under GDPR Article 89.

Re: More callous

Dean/Jill Arndt wrote:
> 
> While the topic of callous is being discussed I'd like to throw in
> another question.  How do you get a softwood cutting to stop producing
> callous tissue and start putting out roots?  I grew some French hybrid
> lilacs this summer, some of which rooted well, some moderately well, and
> some very poorly.  In some of the poorer ones the cuttings had large
> amounts of callous but no root.  It appeared that if roots did not form
> in the early stages of callousing then they never formed at all.  Does
> anyone know what induces rooting as opposed to callousing?
> 
> Dean Arndt
> Manitoba, Canada

I attended a 4 hour session at a recent Nursery Trade Show that dealt
with propogation.  One comment made by the instructor was that excess
amounts of rooting hormone causes TOO much callous to form.  He led me
to believe that this forms in lieu of roots.  However, if all your
cuttings were done in one session, using the same techniques and the
same materials, I would assume that this would be a typical response. 
(We can't always get 100% all the time.)
At this point, you'd have to look to other similarities in the
"moderately well" and the "very poorly".  It could be that they are all
located at the outside edges of the flat, where often watering is not as
even as the interior.  Or that they are in a section of the flat that is
overhanging the heating bench.  (I found once that an entire flat of
Superpetunias failed, except for the area that was hanging out in free
space with no heat to the roots.  In this case, I learned that
Superpetunias don't want heat.)  Or, are they all consecutive in the
tray, indicating that the concentration of hormone was getting
diluted/concentrated?
Hope this was of some help.

The Greenhouse Nursery
81 S Bagley Creek Road & Hwy 101
Port Angeles, WA  98362
References:
Other Mailing lists | Author Index | Date Index | Subject Index | Thread Index