Hippeastrum seeds

Hans-Werner Hammen haweha@hotmail.com
Fri, 04 Nov 2005 11:22:06 PST
Hello Darren:

the total  depth of these 50 cm x 18 cm boxes is 15 cm and the height of the 
seed beds is then 12 to 14 cm.


The dimensions are not critical and do not decide on fortune as regards to 
raising seedling of hippeastrums or other amaryllogene plants with these 
papery foiled seeds.

A lower drainage layer of some cm of seramis, perlite, expanded clay bullets 
(regardless whether these are totally porous (Seramis) or not, or charcoal 
grains is sufficient, let's say 5 cm. But 10 cm is good, too.

Care should be taken (it should be controlled) that the drainage bullets do 
not clog the drainage holes on the ground of the sowing box. I drill 
numerous additional drainage holes of 0.5 cm diameter to ensuire good air 
supply from belw. That is soo important - particularly when I rinse so 
thoroughly with approx. 1 total seed bed volume of water(!)

The drainage layer is then covered carefully - without mixing - with the 
substrate, that is coco peat, the height not being critical, too; something 
like 9 cm.

If you change the proportion of substrate to drainage layer towards the 
latter, then my previously recommended very thorough waterings might be less 
critical for seedlings of those amaryllids (or any other seedlings) which 
are supposed to be very sensible and likely to rot. On the other hand you 
will have to water more often.

If you sow seeds from a vigorous hippeastrum cultivar you will better use a 
full height of 10 cm of coco. But if you sow thse far smaller seeds of a 
more tiny cultivar for example from crossing H.cybister "Chico" with another 
smaller growing hybrid  like "Pink Floyd" then you reduce the coco layer to 
7 cm considering the far lower water uptake of these more delicate 
And if you sow Cyrtanthus Mackenii (I did this summer) - then only 5 cm coco 
is sufficient.
The loss of sed bed hjeight is compensated by a thicker drainage layer.

The question when the seedlings are to be transplanted can not be answered 
schematically either: This is in your decision and depends on the 
observation - "WHEN do the seedlings obviously become too crowded". If you 
have had a good germination rate and furthermore experience a rapid growth 
of vigourous seedlings you will have to transplant earlier. The minimum time 
I keep these seedlings together is 5 months. The maximum timespan I let the 
seedlings together was 10 months in single cases, but I do not recommend 
that. The meanwhile rich network of stronger roots from the individual 
plants is not easily separatable any more and serious damage to the basal 
plates is very probable to happen when using force.


>From: "Darren Sage" <darrensage100@hotmail.com>
>Subject: Re: [pbs] Hippeastrum seeds
>Date: Wed, 02 Nov 2005 22:56:11 +0000
>How deep are those trays illusstrated?  How long do the seedlings stay in
> >From: "Hans-Werner Hammen" <haweha@hotmail.com>
> >Subject: Re: [pbs] Hippeastrum seeds
> >Date: Wed, 20 Jul 2005 17:22:18 +0000
> >
> >I sow into freshly recontituted coco peat substrate, and  I put every
> >single seed, one beside another with blunt tweezers into slits formed 
>with a ruler.
> >This is the most accurate and yes, rather rapid method.
> >http://img.photobucket.com/albums/v215/…
> >

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