I have made quite extensive use of coffee grounds as a grass mulch under
hedges, as an isulating layer on gardens over winter, as a soil conditioner,
as a fertiliser and in compost.
good as a mulch, dependent on what you want the mulch to do. To deter weeds
you will need to pile in on quite thickly but it will do a good job. As a
soil conditioner or to preserve a tilth during winter also very good.
Grounds will sit around for several months as a layer on top of the soil and
decompose. They stick together quite nicely on the top whilst near the
bottom they compost. The top may get dry and crusty whereas near the bottom
the grounds remain moist. You will get a bit of mold but that doesn't seem
to be a problem. A decent mulch of grounds on a garden over autumn will
leave a nice moist fertile planting bed by spring. I have used them for
several seasons on a number of my gardens & have witnesses the results.
As a source of organic matter also very good from my observation. Aside from
the insulating elements described above, they do add organic matter,
encourage worms and have some fertiliser benefits (in approx + ratios to
animal poops). Mulch one of your gardens over autumn with 1-2 inchs (or more
if you want) and observe the changes in soil characteristics through winter
and in to early spring.
I also use them on the lawn as a fertiliser. They have to be broken up &
spread thinly mind. Some people reckon they are acidic but from what I have
read most of the acidity will have been extracted through the coffee making
process & mild amounts of coffee grounds will have minimal effect on decent
soil. If you have acidic soil you will likely lime or use wood ask anyway so
the grounds will be little effect.
And best of the best, they are free as a fart & readily available from any
Waiting for similar answer. I've got a cylindrical shaped metal trash can
with a plastic liner. I've been dumping coffee grounds with filter in that
can since February. I drink about a pot a morning.
Problem is, if you do vermiculture, and you don't throw the grounds out
one day, they will come into the house and take the grounds on their
own. After that, they lie on top of the bin and spell out Starbucks
with their bodies. Fair warning.
A year or two ago, I read an article citing that a university in Hawaii
had discovered, while concentrating on a different issue, that fresh
coffee grounds deter slugs; apparently it was related to the caffeine.
You can probably Google it University of Hawaii + coffee grounds and find
Coffee grounds would make an excellent addition to the soil (used or
fresh); I also read they are good in strawberry beds, likely the slug
In our area, Starbucks leaves the coffee grounds in a basket for customers
to take for their gardens.
Lotta rock and caliche out here. My backyard is on the uphill side. House
is on a side of a hill. Front yard is decent. Backyard is fighting native
grasses/weeds. Got topsoil from the house halfway to the fenceline in the
back. This soil transition line is where the fighting is. You may be
thinking, why don't I drop some more topsoil there? Can't do too much
topsoil in the back at once, it will wash to the house. Spent all late
winter and spring doing the front including bringing in more topsoil and
building retaining wall. Its now hot, and I'm tired. Will drop all them
coffee grounds on the transition line, see what happens.
My garden has billions of jalapenos (fruit), a few watermelons. The
cantaloupe may succumb to the heat. They're flowering though.
Cross-pollination may be interesting.
One question, how do I tame the watermelon? They string all over the place.
Just cut them to length? Don't want to shock them into not growing at all.
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.