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Old 29-04-2021, 06:09 AM posted to uk.rec.gardening
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Default mixing old coffee grounds in garden soil?

Some people say mixing old coffee grounds into garden soil makes it
better for growing plants. Is this actually a good organic enhancement
for the garden soil?

TIA Bill S.

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Old 29-04-2021, 10:04 AM posted to uk.rec.gardening
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Default mixing old coffee grounds in garden soil?

On 29/04/2021 06:09, bilsch01 wrote:
Some people say mixing old coffee grounds into garden soil makes it
better for growing plants. Is this actually a good organic enhancement
for the garden soil?


It is marginally effective at keeping slugs off softer plants and rots
down to organic fines with time. Caffeine is moderately toxic to slugs
and snails and the texture is not to their liking either.

Unless you have a serious coffee habit or access to the backdoor of a
coffee shop it would be a very expensive soil improver.


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Martin Brown
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Old 29-04-2021, 02:29 PM posted to uk.rec.gardening
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Default mixing old coffee grounds in garden soil?

On 28 Apr 2021 22:09, bilsch01 wrote:
Some people say mixing old coffee grounds into garden soil makes it
better for growing plants. Is this actually a good organic enhancement
for the garden soil?


Always pour the grounds around my more tender (slug wise) plants and it
does appear to have some effect in keeping them off.

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Bob Hobden
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Old 30-04-2021, 09:38 PM posted to uk.rec.gardening
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Default mixing old coffee grounds in garden soil?


Some people say mixing old coffee grounds into garden soil makes it
better for growing plants.


Should be used with great care, Coffee plants exclude a substances
that inhibits seedling growth, this is their way of making sure their
seedlings have a better chance of survival
James Wong of GQT did a number of experiments a few years ago and
proved that coffee grounds are not good for the soil

A few handfuls mixed in with the compost heap will not be a problem,
but a sack full for the local coffee shop would be

Last week's GQT had this as its second question,

As for it stops slugs, plenty of videos showing that it does not stop
them, easy to see why, slugs travel on the mucus they produce, so
nothing stops them accept a water barrier, (and even then they may go
under it)
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Old 02-05-2021, 11:03 AM posted to uk.rec.gardening
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Default mixing old coffee grounds in garden soil?

On 30/04/2021 21:38, Derek wrote:

Some people say mixing old coffee grounds into garden soil makes it
better for growing plants.


Should be used with great care, Coffee plants exclude a substances
that inhibits seedling growth, this is their way of making sure their
seedlings have a better chance of survival
James Wong of GQT did a number of experiments a few years ago and
proved that coffee grounds are not good for the soil


That seems a bit OTT.

Inhibiting unwanted seedlings could be a benefit from using coffee
grounds like that. Foxglove, poppy and annual weed seedlings are too
plentiful as it is - a bit of inhibiting is not a problem.

The only common UK plant I can think of that seriously causes problems
is walnut which really does have a potent anti competition compound in
its roots called juglone.

A few handfuls mixed in with the compost heap will not be a problem,
but a sack full for the local coffee shop would be

Last week's GQT had this as its second question,

As for it stops slugs, plenty of videos showing that it does not stop
them, easy to see why, slugs travel on the mucus they produce, so
nothing stops them accept a water barrier, (and even then they may go
under it)


Although there are it is still better than nothing and relatively
harmless to everything else.

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Regards,
Martin Brown


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Old 02-05-2021, 11:19 PM posted to uk.rec.gardening
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Default mixing old coffee grounds in garden soil?

On 02/05/2021 11:03, Martin Brown wrote:
The only common UK plant I can think of that seriously causes problems
is walnut which really does have a potent anti competition compound in
its roots called juglone.


Garlic mustard is reportedly a problem in the US because of its chemical
warfare against other plants (or rather against symbiotic fungi);
presumably European ecosystem have adapted to cope. (In the US garlic
mustard can take over forest floors; here, in my experience, it is a
plant of woodland edges, including hedgerows.)

--
SRH


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