IAS Aroid Quasi Forum

About Aroid-L
 This is a continuously updated archive of the Aroid-L mailing list in a forum format - not an actual Forum. If you want to post, you will still need to register for the Aroid-L mailing list and send your postings by e-mail for moderation in the normal way.

  Amorph. titanum seedling dormancy
From: Ken Mosher ken at spatulacity.com> on 2005.04.06 at 19:59:28(12845)
I planted 10 Amorph. titanum seeds on July 1, 2004. I got 100% germination
over the next 3 months, so the oldest seedlings are just 9 months old.

4 of the 15 have entered their first dormancy in the last month. I was
expecting them to produce a second leaf rather than going dormant, but
that's not happening. The tubers on the first two were the size of a
ping-pong ball, approximately. Firm and healthy looking. (The second two
have just gone, I haven't exhumed them yet.)

Are my seedlings behaving as others have experienced? Assuming everything
is OK how long should I expect them to sleep before sending up the second
leaf? I've been keeping the soil of the dormant ones slightly moist - I
believe that's right for titanum.

The room they're in gets *very* warm during the day now that we're getting
better sun, so they should be happy about that.

Thanks for your advice,
Ken Mosher, Connecticut USA, zone 5

+More
From: "Scott Hyndman" hyndman at aroid.org> on 2005.04.07 at 07:01:29(12848)
Ken,

What is your night temperature? As you probably know, physiologically the
night temperature has probably more of an influence on the growth of tropical
plants like Amorphophallus titanum than the day temperature does.

Are these seedlings from the seed that Troy of Bali Orchid Garden offered
last year? I planted some of his second batch of seed in late summer and
they are still actively growing with their second growth cycle leaves and
some with their third growth cycle of leaves; no dormancy yet. I have kept
the seedlings at a night temperature of 75 F (24 C) and a day temperature of
75 F to 90 F (32 C) in a greenhouse here in South Florida.

Good growing, Scott

On Wed, 06 Apr 2005 22:59:28 -0400, Ken Mosher wrote
> I planted 10 Amorph. titanum seeds on July 1, 2004. I got 100%
> germination over the next 3 months, so the oldest seedlings are just
> 9 months old.
>
> 4 of the 15 have entered their first dormancy in the last month. I
> was expecting them to produce a second leaf rather than going
> dormant, but that's not happening. The tubers on the first two were
> the size of a ping-pong ball, approximately. Firm and healthy
> looking. (The second two have just gone, I haven't exhumed them yet.)
>
> Are my seedlings behaving as others have experienced? Assuming
> everything is OK how long should I expect them to sleep before
> sending up the second leaf? I've been keeping the soil of the
> dormant ones slightly moist - I believe that's right for titanum.
>
> The room they're in gets *very* warm during the day now that we're
> getting better sun, so they should be happy about that.
>
> Thanks for your advice,
> Ken Mosher, Connecticut USA, zone 5

+More
Note: this is a very old post, so no reply function is available.