I vote that it is.

The article took some sound scientific evidence, used it out of context and came up with their own un-scientific results.

Coffee grounds seem great for my compost-black soldier flies love them.
Household amounts in my garden- too 'anecdotal' to prove anything, but I'd rather put something that looks and behaves just like dirt in the garden not the landfill.
Indoor plants, I do not- bad texture for potted plants.

My Camelia loves 'em so does my Hylocereus so I vote yes!!
{Percolated coffee grounds that is).

I have been using coffee grounds in my compost bin for years without any negative results. I also bury banana peels around my roses and they LOVE it! No bugs either if they are under the soil. I use egg shells in my garden compost without grinding them. A friend told me it helps keep slugs out and I've not had any problem with slugs since I started using egg shells.

I keep small baggies of coffee grounds and chopped banana peel in my freezer. When I want to feed my rose, I dig a small hole and dump the contents of a bag into the hole. My rose loves it.

My husband's grandfather had a working farm in Poland before the borders changed during the war. He had about 30 farm hands working for him. After he came to America with his family he worked for a restaurant in the gardens. He felt that coffee grounds were worth their weight in gold. His flowers and fruit trees were productive and pest free. Experience is worth more than opinion. Coffee grounds have been very helpful in my own gardens for over 40 years.

I agree that they can be very useful in the garden. I use them outside, but haven't tried it for indoor pots.

I agree.

Coffee grounds decompose fine, it kinda depends on your soil. Coffee grounds are worm candy, it does draw predators to feast on my huge earthworms that are only there for the grounds. Inside a pot would be negligible as worms aren't good in containers. They don't have enough of the mulch to feed on in a pot, so their backup food resource becomes your plants roots. Kinda like pillbugs...decomposing matter is their need, but anything in a pinch becomes food when you do your job too well. Container pots are picky about their soils usually, less is better.

Caffeine is poisonous to slugs. Unfortunately, there's not much caffeine in leftover coffee grounds, and they probably don't like to eat it either.

I used to get buckets of coffee grounds from the cafeteria at work. I put them in the compost, filters and all. But then I got tired of picking the trash out of it. People don't understand the difference between trash and compost!

I've had one bad experience with coffee grounds. My yew didn't like it and died where the grounds touched it. The yew is ground cover for raspberries and roses. Roses and raspberries, of course, were fine. I just cut out those parts of the yew and let the good parts grow back. I was really surprised that happened.

PamelaLynn77 said:Just curious what you gardeners think about coffee grounds?
Also what about coffee grounds in potted plants, curious about what others think.......



https://curiosity.com/topics/w...

The thing to keep in mind is while coffee grounds add nitrogen to your compost, they will not immediately add nitrogen to your soil. The benefit of using coffee grounds as a fertilizer is that it adds organic material to the soil, which improves drainage, water retention and aeration in the soil.

cwhitt said:My compost bin if full of all three, and I have never had a problem.

Back when I had my outdoor kitchen next to the shade garden, I dumped the ash from the grill and the coffee grounds in a pile together right there in the shade garden... reckon the wood ash took care of whatever acidity the coffee grounds might have contained.

I checked the article....

I didn't see the point in even writing it...

when we dump the coffee grounds in the compost, and add whatever other kitchen scraps, plus the plants that get pulled out of the garden and whatever else... it really doesn't matter how acidic or alkaline anything is... it all balances out.

Agreed!!!

Thank you ALL for your opinion experience ect! I hope you all know how much these post " questions " help me learn. Some of you may remember I just started few years ago and this is my 3 rd or 4 th year here. My 1st 9 months of Gardening I spent way too much time searching out every question , problems I came into from my first run in with moths to plant disease I was able to make my way around but finding this web site was heaven sent and I SHALL NEVER LEAVE! LOL
Seriously thank you each 1 of you that always take time to respond to even my most frustrating of questions.. like how many times must you say " leave the plant alone & Do not over water my OCD is a nuisance at times. Lol
" TYp so much for your patience! I truly appreciate it.
Im Absolutely terrible at remembering names so please forgive me that Im not going to name each of you. You know who you are, you have a good heart. . ;)
HAPPY GARDENING MY FRIENDS! Hope your having a great New Year! 2019 is for " ROCKING GARDENERS!"








'

I only use them as a green in the compost bins. Every once in a while I go on a tangent and run to all the Starbucks and get as much as I can. The spent coffee has a label that's says great for roses but id never apply it directly because I don't have a clue as to how much to add. Sort of surprises me that Starbucks would make such a claim due to liability.

This scientific study of coffee silver skins and grounds, really has nothing, absolutely nothing to do with its effect on soil but I am putting the abstract and conclusion that these studies often are bollocks waste of money at best by people with too much time on their hands.

https://core.ac.uk/download/pd...

Abstract
Spent coffee grounds (SCG) and coffee silverskin(CS) represent a great pollution hazard if discharged into the environment. Taking this fact into account, the purpose of thisstudy was to evaluate the chemical composition, functional properties, and structural characteristics of these agro-industrial residues in order to identify the characteristics that allow their reutilization in industrial processes. According to the results, SCG and CS are both of ligno-cellulosic nature.Sugars polymerized to their cellulose and hemi-cellulose fractions correspond to 51.5 and 40.45 % w/w, respectively;however, the hemi-cellulose sugars and their composition sig-nificantly differ from one residue to another. SCG and CS particles differ in terms of morphology and crystallinity, but both materials have very low porosity and similar melting point. In terms of functional properties, SCG and CS present good water and oil holding capacities, emulsion activity and stability, and antioxidant potential, being therefore great candidates for use on food and pharmaceutical fields

Conclusions
This study allows concluding that SCG and CS are sugar-rich
lignocellulosic materials composed also of high levels of
insoluble, soluble, and total dietary fibers. Both residues have
interesting functional properties including water holding capacity, oil holding capacity, emulsion activity and stability,
and antioxidant potential, which open up possibilities for their
reutilization in different biotechnological process. They could
be used, for example, as preservatives in food formulations, as
natural antioxidant sources for application in food and pharmaceutical products, or as raw material to obtain new functional ingredients for food industry. SCG and CS are also
thermostable in a large range of temperature, being therefore
suitable for application in the manufacture of biomaterials and
encapsulation products for several industrial purposes. In
brief, the present study allows concluding that SCG and CS
have characteristics that make possible their reutilization in
different industrial fields. Despite some efforts have recently
been done in order to find possible alternatives to reuse these
residues, the implementation of industrial processes using
SCG or CS as raw material is still a challenge to be surpassed.
This study gives support to direct further research and developments in this area.

RpR ~ What are coffee silverskins?

@evelyninthegarden I had to Google coffee Silverskins too!
https://www.sciencedirect.com/...
Coffee silverskin (CS) is the only by-product produced during the coffee beans roasting process, and large amounts of CS are produced by roasters in coffee-consuming countries. However, methods for the effective utilization of CS have not been developed. Reuse of CS, which is the primary residue from the coffee industry, is important for the environment and economy. Recently, there have been some attempts to reuse CS for biological materials and as a nutrient source for solid-state fermentation.