Disregarding nutrient limitations, most plants
exhibit some level of apparent greater growth under shaded conditions.
Waterhyacinth is one of those plants. Under full sun, plants produce
growth regulating hormones that result in compact, high density stem
and leaf growth. When shaded, less of the hormones are produced and
plants tend to elongate, attaining greater stem lengths, etc (but
usually lower biomass than those plants under full sun). "Leggy"
growth of plants is often the result of full sun species kept under
shaded conditions. Three and four foot tall waterhycainths are not
uncommon in the backs of shaded coves in some lakes.


An interesting example is seen in house plants. Most of us have noted
that some house plants tend to grow towards light (a window). This
occurs because the cells on the opposite side from the window grow
(elongate, not multiply) at a greater rate than those on the lighted
(window) side. The differential growth is caused by different growth
hormone concentrations produced in response to variable light
intensity on either side of the plant. The result is stems bending
towards brighter light.




"how" wrote:

"John Bachman" wrote in message
.. .
I notice that the water hyacinth in my main pond is not nearly as
green as those in a smaller pool that is in my waterfall stream.
Is it possible that WH wants only partial sun?
snip

Hi,
Water hyacinth will grow in FULL sun. Is there any chance that the roots are
touching bottom in the smaller pond?
They do grow better with the roots 'dragging' in the mud.
HTH -_- how
no NEWS is good