Lily Stratification
Gene Mirro (Tue, 14 Feb 2012 10:51:12 PST)

Richard, your photos show a small percentage of germinating seeds. But in
your message, you say "All have begun putting out a radical". Your
stratification times of "30 days at 50 deg f then the last 2 weeks at 40 deg
F" seem very short to me, and 50F seems quite cold at the beginning of the
process. I usually allow at least a couple of months of cool stratification
in Fall and early Winter, starting out at around 60F, followed by at least
three months in Winter at 35-45F. If you shorten these times, the percent
germination will go down, and some of the seeds will not germinate until a
year later in Spring. I try to get as many as possible to germinate in the
first Spring, since the ones that come up in the second Spring seem to be
weaker, maybe due to reduction of their stored food supply.

Since you are seeing signs of germination, I think you should move them to
flats and cover with 1/4" of mix, and continue cold stratification.
Otherwise, you run the risk of damaging the radicals later on.

This last Summer, I tried sowing some NW native lilies in late July. The
Summer was quite cool this year, and root germination seems to be very
strong. No leaves yet though, except for L. humboldti, which always emerges
very early. However, I have had bad results from early sowing in hot
summers, so I usually wait until September to sow. Also, I don't like to
handle the germinated seeds, so I sow them directly into the containers
where they are going to grow.

When the leaves emerge, it is crucial to grow the seedlings cool. No 90
degree greenhouses! The higher the temp, the higher the mortality. If
growing in containers, it can be very difficult to keep these plants alive
in mid to late Summer because of high soil temps, even though they may have
gone dormant by then.

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Sent: Tuesday, February 14, 2012 9:01 AM
Subject: pbs Digest, Vol 109, Issue 26

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Today's Topics:

1. Need identification (Joseph Kraatz)
2. Re: Need identification (Alberto Castillo)
3. OT/ PBS contributor's tragic loss (Youngs)
4. Re: OT/ PBS contributor's tragic loss (The Silent Seed)
5. Need identification (AW)
6. Winter Projects (Richard)
7. Lily Stratification (Richard)

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Message: 1
Date: Mon, 13 Feb 2012 13:16:25 -0800
From: Joseph Kraatz <plantnut@cox.net>
Subject: [pbs] Need identification
To: pbs@lists.ibiblio.org
Message-ID: <5C712669-FC8E-420A-ACF8-1A89736609A5@cox.net>
Content-Type: text/plain; charset=us-ascii

A friend gave me a handful of Oxalis bulbs of which she didn't know the
species. They are now blooming but need help in identifying the species.
Thanks, Joe, Oceanside, CA.

http://flickr.com/photos/oceanside2012/…

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Message: 2
Date: Mon, 13 Feb 2012 21:30:38 +0000
From: Alberto Castillo <ezeizabotgard@hotmail.com>
Subject: Re: [pbs] Need identification
To: Pacific Bulb Society <pbs@lists.ibiblio.org>
Message-ID: <BAY156-W5155DCDDD53C5236B3CA72AE7F0@phx.gbl>
Content-Type: text/plain; charset="iso-8859-1"

You have obtusa and brasiliensis there so far.

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Message: 3
Date: Mon, 13 Feb 2012 23:02:56 -0000
From: "Youngs" <youngs.aberdeen@btinternet.com>
Subject: [pbs] OT/ PBS contributor's tragic loss
To: <pbs@lists.ibiblio.org>
Message-ID: <44AE7AADF91D45FC9A7E1059CF95836E@userfba71dce46>
Content-Type: text/plain; charset="windows-1252"

PBS members must be greatly saddened to hear, as we have been in the UK,
of the death of Michelle Avent, wife of PBS stalwart Tony Avent of Plant
Delights Nursery Inc.

A touching tribute to his wife and partner by Tony is paid here :
http://plantdelights.com/February/products/…
Our thoughts are with Tony at this sad time.

M & I
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Message: 4
Date: Mon, 13 Feb 2012 18:13:07 -0500 (EST)
From: The Silent Seed <santoury@aol.com>
Subject: Re: [pbs] OT/ PBS contributor's tragic loss
To: pbs@lists.ibiblio.org
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I just learned of this this evening - very sad indeed. My heart goes out
to Tony and his family.
Jude

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Message: 5
Date: Mon, 13 Feb 2012 19:42:09 -0800
From: "AW" <awilson@avonia.com>
Subject: [pbs] Need identification
To: <pbs@lists.ibiblio.org>
Message-ID: <E59842C712E54E7ABED05B5F2C70317B@Desktop>
Content-Type: text/plain; charset="us-ascii"

Joe,

I think you have two forms of O. obtusa. That species is blooming all over
in these parts right now. Check the Wiki page on this species to see the
number of color variants there are. You have a nice combination there.

Andrew
San Diego

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Message: 6
Date: Mon, 13 Feb 2012 21:05:58 -0800
From: Richard <richrd@nas.com>
Subject: [pbs] Winter Projects
To: Pacific Bulb Society <pbs@lists.ibiblio.org>
Message-ID: <B479A048-FDAA-458B-9656-BEF5AA5FB7E3@nas.com>
Content-Type: text/plain; charset=us-ascii

Nursery scale stratification

This is what we are working on now at our nursery, preparing mostly tree
and shrub seeds for a 90 day cold stratification and planting in May.
There are many ways to accomplish this task this is just my own twist on
the job. Earlier we used open top plastic bags but this gives us better
aeration and ease of inspection. Here is a series of pictures that
illustrates our process.

rinsing presoaked seed http://flic.kr/p/btpKEK/
setting up tray, paper lined, peat bottom http://flic.kr/p/btpJaP/
fungicide dip (optional) http://flic.kr/p/btpLnK/
spreading seed inside sandwiched layer http://flic.kr/p/btpNSF/
placing seed inside sandwich http://flic.kr/p/btpM76/
covering seed layer with peat http://flic.kr/p/btpJWH/
stacking trays inside cooler. Note warm incubator on right
http://flic.kr/p/btpMMp/
recording all data in a filemaker relational database
http://flic.kr/p/btpMYe/ In this screen shot from left is our field map,
propagation and seed inventory databases

Working with Lily seed is new for me and I have a question in my following
post for lily savy stratifiers.

Rich Haard
Bellingham Washington

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Message: 7
Date: Mon, 13 Feb 2012 21:08:02 -0800
From: Richard <richrd@nas.com>
Subject: [pbs] Lily Stratification
To: Pacific Bulb Society <pbs@lists.ibiblio.org>
Message-ID: <9FA5584B-B614-4A58-BE6C-6355780D3D7C@nas.com>
Content-Type: text/plain; charset=us-ascii

Question for lily stratifiers

All three are fresh collections of L. columbianum and L. washingtonianum.
These are 'immediate cool hypogeal' species and were warm stratified 30
days at 50 deg f then the last 2 weeks at 40 deg F. All have begun putting
out a radical some reaching considerable length with signs of leaf shoot
on a few. They're growing now in mesh bags buried in moist peat. Otherwise
their condition is very nice, no mold.

Earlier this fall in October I field planted the same collections and this
is a test to try stratification and tray planting. These radicals seem
rather fragile. Is it time to move them to flats and continue chilling for
another 60 days before placing outside?

http://flic.kr/p/btoASZ/
http://flic.kr/p/btoBoZ/
http://flic.kr/p/btoBTR/

http://pacificbulbsociety.org/pbswiki/index.php/…

Rich Haard
Bellingham, Washington

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