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Home > Archive > UK gardening > October 2007 > Pond vegetation
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| All these were new in the pond this year - just shows how warm it's been and
how ideal the conditions for these plants. I don't know their botanical
names but to us they are water cabbage, water hyacinth and water
forget-me-not, as far as I know. The pond is now so smothered with them
that we have to remove most of it to a tank in one of the greenhouses. If
we don't, the fish run out of space - there is one tiny corner left free -
or the plants will die at the first frost and we don't want either of those
to happen.
[IMG]http://i21.tinypic.com/1054g9k.jpg[/IMG]
--
Sacha
http://www.hillhousenursery.co.uk
South Devon
(remove weeds from address)
'We do not inherit the earth from our ancestors, we borrow it from our
children.'
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| Dave Poole 2007-10-19, 9:25 am |
| Sacha wrote:
> All these were new in the pond this year - just shows how warm it's been and
> how ideal the conditions for these plants. I don't know their botanical
> names but to us they are water cabbage ....
Usually called 'Water lettuce' - Pistia stratiotes, although it is a
member of the arum family with tiny greenish, arum-like flowers tucked
between the leaves. It's a very nice thing when growing well although
it can be temporarily invasive. I used to overwinter it in shallow
tubs of mud at around 10C.
> .... water hyacinth
Ah the dreaded Eichornia crassipes! Fabulous flowers, but it's a
formidable and worrying pest in tropical regions. It has taken over
entire lakes in Africa where there are few predatory pests to keep it
in check. In its native Amazon basin home it never causes problems,
but when introduced to similar climates elsewhere, Eichornia is a
major scourge blocking out light to the water and causing submerged
water plants to die out, resulting in de-oxygenation of the water and
fish deaths. Growth rates are truly phenomenal, waterways can be
rendered unnavigable by the dense, metre thick carpets of herbage and
the plant is not easily controlled by conventional means.
Not a problem here though - the first hint of cold weather will slow
this and Pistia right down and a couple of frosty night will kill the
plants completely.
> .... water forget-me-not
Isn't this Myosotis scorpioides (formerly palustris) ? It's a pretty,
waterside native perennial that should overwinter perfectly well in
any part of the British Isles.
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|
| On 19/10/07 10:05, in article
1192784709.878827.20390@e34g2000pro.googlegroups.com, "Dave Poole"
<daverpoole@hotmail.com> wrote:
> Sacha wrote:
>
> Usually called 'Water lettuce' - Pistia stratiotes, although it is a
> member of the arum family with tiny greenish, arum-like flowers tucked
> between the leaves. It's a very nice thing when growing well although
> it can be temporarily invasive. I used to overwinter it in shallow
> tubs of mud at around 10C.
>
>
> Ah the dreaded Eichornia crassipes! Fabulous flowers, but it's a
> formidable and worrying pest in tropical regions. It has taken over
> entire lakes in Africa where there are few predatory pests to keep it
> in check. In its native Amazon basin home it never causes problems,
> but when introduced to similar climates elsewhere, Eichornia is a
> major scourge blocking out light to the water and causing submerged
> water plants to die out, resulting in de-oxygenation of the water and
> fish deaths. Growth rates are truly phenomenal, waterways can be
> rendered unnavigable by the dense, metre thick carpets of herbage and
> the plant is not easily controlled by conventional means.
>
> Not a problem here though - the first hint of cold weather will slow
> this and Pistia right down and a couple of frosty night will kill the
> plants completely.
>
>
> Isn't this Myosotis scorpioides (formerly palustris) ? It's a pretty,
> waterside native perennial that should overwinter perfectly well in
> any part of the British Isles.
>
>
Thanks for all these, David. I've made careful notes! Today, Matthew and
Greg have drained the pond, leaving just enough water for the fish and are
hauling out barrow loads of the plants. The problem now will be to find
enough tanks to over-winter them in the greenhouses! When I think that I
saw just one place selling the water hyacinth for £3.95 each..........!
--
Sacha
http://www.hillhousenursery.co.uk
South Devon
(remove weeds from address)
'We do not inherit the earth from our ancestors, we borrow it from our
children.'
| |
| Steve Wolstenholme 2007-10-19, 9:25 am |
| On Fri, 19 Oct 2007 02:05:09 -0700, Dave Poole
<daverpoole@hotmail.com> wrote:
>Ah the dreaded Eichornia crassipes! Fabulous flowers, but it's a
>formidable and worrying pest in tropical regions. It has taken over
>entire lakes in Africa where there are few predatory pests to keep it
>in check.
A few years ago I was working with a programmer who lives in Uganda
close to Lake Victoria. She told me what happened to the lake near her
town. The water hyacinth grew all the way out to the horizon like a
huge flat green field. The fishermen could not reach their fishing
grounds. The last I heard about the problem was that a biological
control had been introduced but it had not reduced the plant growth
very much. I think the control was some sort of moth.
Steve
--
Neural Planner Software Ltd
http://www.easynn.com
http://www.tropheus.demon.co.uk
| |
|
| On 19/10/07 12:05, in article 2s1hh317h5fs4rb5tmq2vpjkt6qh7bshc6@4ax.com,
"Steve Wolstenholme" <steve@tropheus.demon.co.uk> wrote:
> On Fri, 19 Oct 2007 02:05:09 -0700, Dave Poole
> <daverpoole@hotmail.com> wrote:
>
>
> A few years ago I was working with a programmer who lives in Uganda
> close to Lake Victoria. She told me what happened to the lake near her
> town. The water hyacinth grew all the way out to the horizon like a
> huge flat green field. The fishermen could not reach their fishing
> grounds. The last I heard about the problem was that a biological
> control had been introduced but it had not reduced the plant growth
> very much. I think the control was some sort of moth.
>
> Steve
I see that the water lettuce is a notifiable weed in Australia!
--
Sacha
http://www.hillhousenursery.co.uk
South Devon
(remove weeds from address)
'We do not inherit the earth from our ancestors, we borrow it from our
children.'
| |
| Don H3 2007-10-20, 1:25 pm |
| On 19 Oct, 03:45, Sacha <sa...@gardenweeds506.fsnet.co.uk> wrote:
> On 19/10/07 10:05, in article
> 1192784709.878827.20...@e34g2000pro.googlegroups.com, "Dave Poole"
>
>
>
> <daverpo...@hotmail.com> wrote:
en and[color=darkred]
al[color=darkred]
>
>
>
>
>
>
>
> Thanks for all these, David. I've made careful notes! Today, Matthew and
> Greg have drained the pond, leaving just enough water for the fish and are
> hauling out barrow loads of the plants. The problem now will be to find
> enough tanks to over-winter them in the greenhouses! When I think that I
> saw just one place selling the water hyacinth for =A33.95 each..........!
>
> --
> Sachahttp://www.hillhousenursery.co.uk
> South Devon
> (remove weeds from address)
> 'We do not inherit the earth from our ancestors, we borrow it from our
> children.'
Saving one plant would be adequate. Would be too much! I bought one
(species unknown) at a department store Garden Shop from a know-
nothing clerk. In a wet window-box it became 6 plants in barely a
month, at which point I sought pics on the WWW and id'd it as "Water
Lettuce." I gave away all but 1 and isolated it in nested tall plastic
pots in a 20 gallon (75 Liter) aquarium. It DESTROYED the aquarium: 1
plant. All kinds of whitish crud exuded under and at the leaf-tips.
When I started emptying the aquarium to clean yesterday, I found it
had partially dissolved the bottom of one plastic pot, in less than a
week!! It now lives (or dies) in a 2 liter pop bottle* with a dead
Avocado. I should put it back in a wet window-box and give it's babies
to my worst enemies.~}
(*) I cut clear/de-labeled 2 liter pop bottles most of the way around
at the part where the top-curve ends: Instant flip-top micro-
greenhouse. Hmm. Maybe too much light on the roots is what killed the
Avocado though.
| |
|
| On 20/10/07 16:31, in article
1192894269.683493.161120@k35g2000prh.googlegroups.com, "Don H3"
<ehofehof@gmail.com> wrote:
> On 19 Oct, 03:45, Sacha <sa...@gardenweeds506.fsnet.co.uk> wrote:
<snip>
[color=darkred]
>
> Saving one plant would be adequate. Would be too much! I bought one
> (species unknown) at a department store Garden Shop from a know-
> nothing clerk. In a wet window-box it became 6 plants in barely a
> month, at which point I sought pics on the WWW and id'd it as "Water
> Lettuce." I gave away all but 1 and isolated it in nested tall plastic
> pots in a 20 gallon (75 Liter) aquarium. It DESTROYED the aquarium: 1
> plant. All kinds of whitish crud exuded under and at the leaf-tips.
> When I started emptying the aquarium to clean yesterday, I found it
> had partially dissolved the bottom of one plastic pot, in less than a
> week!! It now lives (or dies) in a 2 liter pop bottle* with a dead
> Avocado. I should put it back in a wet window-box and give it's babies
> to my worst enemies.~}
>
> (*) I cut clear/de-labeled 2 liter pop bottles most of the way around
> at the part where the top-curve ends: Instant flip-top micro-
> greenhouse. Hmm. Maybe too much light on the roots is what killed the
> Avocado though.
>
Yes, it's enthusiastic, isn't it?! ;-) But we can sell these - or some of
them next year. When the danger of frost is past out they'll go.
--
Sacha
http://www.hillhousenursery.co.uk
South Devon
(remove weeds from address)
'We do not inherit the earth from our ancestors, we borrow it from our
children.'
| |
| Janet Tweedy 2007-10-20, 5:25 pm |
| In article <C33E4951.5C87A%sacha@gardenweeds506.fsnet.co.uk>, Sacha
<sacha@gardenweeds506.fsnet.co.uk> writes
>Thanks for all these, David. I've made careful notes! Today, Matthew and
>Greg have drained the pond, leaving just enough water for the fish and are
>hauling out barrow loads of the plants. The problem now will be to find
>enough tanks to over-winter them in the greenhouses! When I think that I
>saw just one place selling the water hyacinth for £3.95 each..........!
>
You'll be able to open your own money earning stall next year Sacha ! 
--
Janet Tweedy
Dalmatian Telegraph
http://www.lancedal.demon.co.uk
| |
|
| On 20/10/07 20:14, in article qf0KXBEUOlGHFwDO@ukonline.co.uk, "Janet
Tweedy" <jan@lancedal.demon.co.uk> wrote:
> In article <C33E4951.5C87A%sacha@gardenweeds506.fsnet.co.uk>, Sacha
> <sacha@gardenweeds506.fsnet.co.uk> writes
>
>
> You'll be able to open your own money earning stall next year Sacha !
I'm ordering the waders as we speak.......... ;-)
--
Sacha
http://www.hillhousenursery.co.uk
South Devon
(remove weeds from address)
'We do not inherit the earth from our ancestors, we borrow it from our
children.'
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