Ask a Question forum: Coffee Grounds

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Plantlvr
Nov 21, 2016 5:17 PM CST
I love that there are other people asking this. I have grounds every day and live in an apartment, so a compost bin is not at option. I remember many years ago I brought a ficus (spelling?) tree back to life feeding it my tea water everyday. It loved it. So I thought I could do the same with my coffee grounds with all of my plants. I tried it with my loose tea grounds and the pathos and christmas cactus loved it. So I thought I would be safe to try i the coffee grounds. My aloe vera plants weren't thrilled, so I am not sure if I should try that again. My ficus I am not sure about. It seems ok. I take it out on my balcony in the summer and bring it is before freezing in the winter. It is so BIG I had to rearrange my furniture and put it in the living room where the biggest window is.
Needless to say, I love my plants and want to recycle as much as I can. I am also very very excited to hear about the banana peel water. I will begin that asap. I am not sure how much water to banana peel or peels???
Love this site, thank you,
Name: Rick Corey
Everett WA 98204 (Zone 8a)
Sunset Zone 5. Koppen Csb. Eco 2f
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RickCorey
Nov 21, 2016 5:45 PM CST
I would avoid adding so MANY coffee grounds to a potted plant that they filter down into the potting mix and fill up existing nooks and crannies that used to drain empty of water and give air multiple express highways into the pot.

If fine coffee grounds clog up your potting mix, it will retain more water and prevent air from diffusing to the root hairs. Carried too far, that causes root rot.

Name: James
Anacortes, WA (Zone 8b)
(Heat zone - 1, Sunset zone - 5)
Region: Pacific Northwest Plumerias Adeniums Tropicals Bromeliad Cactus and Succulents
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JamesAcclaims
Nov 21, 2016 6:01 PM CST
Some great observations and input here. Also, coffee is pretty acidic. Some plants prefer more acidic soil, while some prefer more alkaline. Adding too much can greatly affect the pH balance of the soil--especially in smaller pots.
I am not an early bird or a night owl--I am some form of permanently exhausted pigeon
Name: Sue
Ontario, Canada (Zone 4a)
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sooby
Nov 21, 2016 6:07 PM CST
Welcome! Another thing to consider is that coffee grounds can have an allelopathic (inhibiting) effect on some plants. You might find this article on coffee grounds interesting:

https://puyallup.wsu.edu/wp-co...
Name: Sue
Ontario, Canada (Zone 4a)
Daylilies Birds Enjoys or suffers cold winters Native Plants and Wildflowers Butterflies Annuals
Region: Canadian Keeps Horses Dog Lover Plant Identifier Garden Sages
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sooby
Nov 21, 2016 6:10 PM CST
James, coffee grounds aren't necessarily acidic, they can even be alkaline (see above article). I tested mine and they were just slightly below neutral at pH 6.8.
Name: greene
Savannah, GA (Sunset 28) (Zone 8b)
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greene
Nov 21, 2016 6:14 PM CST
JamesAcclaims said:...coffee is pretty acidic...

The brewed coffee that we drink is acidic. The acid leaves the ground coffee, goes into our morning cup and very little, if any, acid remains in the used grounds.

RickCorey is right. A little layer of used coffee grounds is okay, but adding too much will be counterproductive.

Sunset Zone 28, AHS Heat Zone 9, USDA zone 8b~"Leaf of Faith"
Name: James
Anacortes, WA (Zone 8b)
(Heat zone - 1, Sunset zone - 5)
Region: Pacific Northwest Plumerias Adeniums Tropicals Bromeliad Cactus and Succulents
Container Gardener Plant Identifier Plays in the sandbox Garden Procrastinator Garden Photography
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JamesAcclaims
Nov 21, 2016 6:15 PM CST
Yes! I just read the article that you posted. I was mistakenly under the assumption that all coffee was acidic, as the coffee that I had tested was, and I had also heard other reports that agreed with the finding of the coffee that I typically use. Apparently (which I should have known) not all coffee is created equal! Thumbs up At least I can stand by the comment of it possibly changing the pH balance, it could just go both ways Whistling

Great link, btw. Thanks for sharing!

(Edited to add, I do use coffee water, not just the ground, on a few of my plants)
I am not an early bird or a night owl--I am some form of permanently exhausted pigeon
[Last edited by JamesAcclaims - Nov 21, 2016 6:18 PM (+)]
Give a thumbs up | Quote | Post #1322281 (7)
Name: Barbalee
Amarillo, TX (Zone 6b)
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Barbalee
Nov 22, 2016 8:32 AM CST
sooby said: https://puyallup.wsu.edu/wp-co...

Great article, Sooby! Thank You!

Avatar is 'Global Crossing' 04-20-2017
Name: Philip Becker
Fresno California (Zone 8a)
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Philipwonel
Nov 22, 2016 10:34 AM CST
Hea !!! What's this banana water thing ? I wana i wana know 😫!?!?!
😎😎😎
Anything i say, could be misrepresented, or wrong.

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