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  Re: Aroids growing better in water?
From: "Ron Iles" roniles at eircom.net> on 2002.05.26 at 04:43:46(8879)

Thank you very much for your
kind advice.

For security, during the
northern winter, after acclimatisation & quarantine the Spaths were planted
in heated beds (75-80F) of peat moss/soil-less compost with gravel over >6"
of sand for heating cables, all kept moist & the root systems were
extensive. They have now been potted to rationalise the
assemblage. A mixture of soil-less compost & gravel was used
in pots with drainage. This is short term (summer) because I do not
like the soil-less compost. Apart from fine perlite, very costly, I
have no access to lava rock, pumice.

In Ireland the plants are
grown indoors, no rain, no wind & good light but no direct unfiltered

Since certain Spathiphyllum
are grown as submerged aquarium plants I wanted to see how more could be grown
in that way. I transferred a range of sample common forms into
strongly aerated waters immersed up to petiole bases, but it was NOT
successful & I need to find out WHY. These forms do grow naturally
emersed & I did this in UK but in very well drained soil not in peat based
composts. Does your method maybe allow a different kind of root to develop
for immersion (more aerenchymatous???) not harmed by waterlogging, whereas maybe
the plants not immersed have a different structure? Willow (Salix)
& other native Trees here grow best here in my muddy sludgy Garden Stream, I
just wonder if they too develop roots of special structure adapted to less
aerobic conditions?

So, thank you, I will try
your method with common plants & as roots penetrate the inorganic lower part
progressively immerse them. I will also examine the nature of the root
growth as it happens.

Many plants especially
Spathiphyllums can be grown hydroponically in inorganic aggregates, e.g. pumice,
rockwool, perlite or even with roots in a covering membrane in
air being intermittently submerged or sprayed with water containing very
weak nutrients. What I would most like to do is to grow as many
Spaths as possible as rheophytes/helophytes. They would then
surely be immune to all soil threats. Swamps
have substrates which are often foul smelling & seemingly anaerobic so
it seems that Spathiphyllum plants which thrive in such conditions may have
roots of different structure to those in my moist & adequately aerated
pots? So if they are different, can I get my Spaths to
grow such roots so that I can grow totally immersed in indoor
stream/pond environments, not so much in those darn (plastic!)

Has anyone else tried instant
or slow inundation with aroids?


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