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Re: Seed Germination Time

R. Canina germination was the subject of a research paper.
In the 1956 American Rose Annual G.D.Rowley from the John Innes
Horticultural Institution, England wrote: "However, one factor was found to
exert a great influence on both total viability and speed of germination.
That is the time at which the hips are harvested.  Preliminary tests showed
that prematurely harvested seeds (that is, those collected at any time
between petal fall and while the hips are still green and the sepals fresh)
gave negligible germination over four years (only one in 300)."  This is
followed by a table which is summarized here: Date of hip collection - Sept
8, Sept 22, Oct 6, Oct 20, and Dec 1.  This is a three month range for when
they were able to pick good hips.  The corresponding percent germinations
are: 17%, 53% 60%, 15%, and 13%.  The corresponding color of the hips was:
Flushed orange, firm; Red, Firm; Red, Firm; Red, Firm; and Red, soft, and
jammy.
Another table presents the following information.
The first year after sowing only 0.7% of the seeds germinated, the second
year 30.7% germinated, the third year 1.2% germinated, the fourth year 0.7%,
and the fifth year 0.3% germinated.
Henry Kuska, retired
kuska@neo.lrun.com
http://home.neo.lrun.com./kuska/
-----Original Message-----
From: Dave Amorde <dave_amorde@msn.com>
To: rose-list@eskimo.com <rose-list@eskimo.com>
Date: Monday, July 27, 1998 5:47 PM
Subject: Seed Germination Time


>I don't know the specific germination time for R. canina, but the range is
>from 3 weeks to over 4 months! Don't give up!
>
>-Dave-
>-----Original Message-----
>    From: Asata <heaven_7@sirius.com>
>    To: Rose-List <rose-list@eskimo.com>
>    Date: Monday, July 27, 1998 10:20 AM
>    Subject: R. Carnina Seed
>
>
>    Hello to All.
>
>    Thanks Dave and Carleen for your input on how to stratify seed. I
soaked
>my refrigerated R. Carnina seed overnight and planted them this past
>weekend. Got my fingers and toes crossed!!! ;-).
>
>    Does anyone know the germination times for rose seed? I planted them in
>a soiless mixture and put them outside in a bright place with plastic wrap
>over the top of the pot. I was wondering if bottom heat would help them
>germinate faster.
>
>    Carleen, were you able to find a source for "sweetbrier" - r.
eglanteria
>seed? I don't think Richter's had those.
>
>    Best Wishes!
>
>    Asata
>
>
>    USDA Zone 9
>    Sunset Zone 14
>
>
>
>
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