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Today's Topics:

1. Re: Perlite substitute (Mary Sue Ittner)
2. Re: Iris dichotoma (James Waddick)

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Message: 1
Date: Tue, 04 Jul 2006 20:53:05 -0700
From: Mary Sue Ittner <msittner@mcn.org>
Subject: Re: [pbs] Perlite substitute
To: Pacific Bulb Society <pbs@lists.ibiblio.org>
Message-ID: <5.2.0.9.2.20060704200348.045a6cc0@mail.mcn.org>
Content-Type: text/plain; charset="us-ascii"; format=flowed

Hi,

I find it interesting when we revisit this subject every now and then.
What
I've noticed is that we are such a diverse group from so many climates and
situations that what works one place does not seem to work as well other
places. In the beginning of my bulb addiction I tried whatever anyone
suggested. Perlite made me cough so I abandoned it. Someone recommended
cat litter once. I tried it unsuccessfully ( I did look for one without a
lot of additives.) I searched everywhere for Turface, calling around and
finally found some that I could purchase I think as Profile clay soil
conditioner or perhaps it was aquarium mix. Nothing has ever grown very
well for me in it so I've stopped looking for it. Someone recommended
decomposed granite so I got a bag of it at a landscape supply store. It
was
so heavy and clumped too and in my wet winters I'm sure did not generate
the air porosity I needed. Red lava rock easily obtained in Northern
California was not a success either although I think in a bed where I
mixed
it in bulbs may have done better in later years so perhaps the rain
leached
something out that was not good in the beginning. When I first started
growing bulbs I read that 1/2 sand and 1/2 peat moss was very good. So I
bought sand and didn't realize it needed to be coarse. The definition of
"sand" to me was what you had in your sandbox as a child or saw at the
ocean. I am sure what I added to my mix resulted in less air in the mix
instead of more. I never could find grit when I was looking for it when
everyone talked of adding grit to the top of their pots. What I use now is
coarse sand (which is like small pebbles or rocks) easily obtained at
landscape stores and even available here away from civilization and
pumice
which I can get in bags at Orchard Supply and a place called Harmony
Supply
in Sebastopol. Those places are a couple hours away so we buy a lot of
bags
when we go. And it isn't cheap either. You can also get it at Charley's
Greenhouse Supply but it is even more expensive there (although in
different grades.) What I'm looking for is something to add air porosity
to
my mixes during my main growing season when it rains a lot and
temperatures
are cool. Most of the bulbs in my collection are winter growers. Sometimes
I add fir bark or even redwood compost and a handful of coir too even
though I've been told that the salt content in it can be very damaging for
some plants. I loved Bob Werra's description of his Moraea mix when he
asked and answered the rhetorical question about why he used what he did
with, "just because." There are a lot of ways to grow bulbs and if you
keep
trying you find what works for you. I seem to recall John Lonsdale who
brought up this whole subject telling us he used composted peanut hulls
with his perlite and that obviously isn't something easily obtainable
here.
I'm don't mean to discourage all the suggestions since it is fascinating
to
hear what works in different places, but since we probably have all levels
of experience in our group would like to point out to the beginners in our
group that additives are often used to create air spaces in your mix so
the
bulbs won't rot and to do that the particles have to be different sizes.
That's why perlite when it gets to be mostly fines or fine sand is a
problem. Using some of these things can create bog conditions with very
little air.

Mary Sue

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Message: 2
Date: Wed, 5 Jul 2006 08:25:49 -0500
From: James Waddick <jwaddick@kc.rr.com>
Subject: Re: [pbs] Iris dichotoma
To: Pacific Bulb Society <pbs@lists.ibiblio.org>
Message-ID: <p06230942c0d16d2bf0d4@[192.168.1.101]>
Content-Type: text/plain; charset="us-ascii" ; format="flowed"

Dear all;
Iris dichotoma is very hardy. Easily Zone 3 and possibly
further north. I recommend growing it from seed which is very easy.
This is one of the parents of Candy Lilies (xPardancanda). The other
is Belamcanda Chinensis (Now Iris domestica).

These Candy Lilies actually show a variety of colors and
forms-some closer to I dichotoma - others closer to I domestica. I
like the ones that have the I dichotoma forms, but a variety of
colors from white to yellow, pink, red, purple etc. These take some
careful selection of seedlings.

A nice things is they bloom very late in the day- about the
time you might return from a day of work, these are just open and
fresh. Each flower last just a day, but there may be a hundred on
each well branched stallk and they open over a long period. And they
are drought tolerant too.

Best Jim W.
--
Dr. James W. Waddick
8871 NW Brostrom Rd.
Kansas City Missouri 64152-2711
USA
Ph. 816-746-1949
Zone 5 Record low -23F
Summer 100F +

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End of pbs Digest, Vol 42, Issue 8
**********************************