Coffee in the Garden: Enjoy it Twice

I love coffee.

Many of us love coffee.

We all love gardening so…………..

I enjoy nothing more on summer mornings than sitting on my deck, sipping a warm cup of coffee, enjoying the quiet sounds and watching the world come alive. I look out over the garden, smell the fragrance, listen to the birds and just enjoy the moment. A lot of coffee gets consumed in my house. I also have a lot of garden beds in need of good compost. So I take advantage of this ready source of nitrogen and add coffee grounds to my compost. In doing so, I get to enjoy the benefits of coffee twice.

How good of a source of nitrogen is it?

Used coffee grounds are an excellent source of nitrogen, and a few other nutrients and minerals. Depending on which scholarly article you read, coffee grounds are somewhere around 3% nitrogen by volume. So on it’s own, coffee grounds would read as 3-0-0 for NPK. They do also contain potassium and phosphorus, but generally less than 1% by volume. 3% isn’t too shabby. Now coffee alone shouldn’t be your only source of nitrogen. But when added to compost bins, it creates another diverse source of nitrogen for you.

compost grounds

Why wait then? Why not just add it straight to the garden beds?

You can add your grounds directly to the garden soil. However, the nitrogen in coffee grounds is not readily available for plant uptake. The grounds have a carbon to nitrogen ratio of about 20:1. If you remember your rule of thumb for compost breakdown, then you want that ratio closer to even. The coffee grounds are an available source of food for beneficial microbes, but that process can rob the soil of it’s existing nitrogen. So you can add them, but you will also need to supplement with additional fertilizer, so whats the point? Eventually when the coffee grounds break down, they will provide nitrogen, but that takes time and could represent a good portion of your growing season. You should not  expect any results right away.

But coffee is acidic……

Adding spent coffee grounds to your soil, or using compost of which they are a part will not make your soil more acidic. Used coffee grounds have a pH of between 6.5 and 6.8. That is slightly acidic, but pretty close to neutral. The brewing process removes most of the acid from the grounds because it is water-soluble. Your coffee ends up being acid and the grounds neutral. So don’t be scared by this urban myth. It’s based on only knowing half the info. This all being true, fresh ground coffee poured around your hydrangeas and watered in, should in theory cause a color change. I have never played around with it, but it sounds like a fun experiment.

Where to get the grounds

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Kitchen grounds bucket with some vegetable scraps in it

If you drink coffee, you have grounds. But that alone may not add up to enough to be meaningful. Luckily for us, there are a lot of other coffee drinkers in the world. So there are lots of grounds available. There has been a lot written about making deals with coffee shops, convenience stores and the like for their grounds. They almost always have coffee brewing, and they produce a lot of grounds. But realistically, they don’t want a stinky bucket of used grounds underfoot. So you can ask, but you will need to stay on good terms with them. Try smaller, boutique coffee shops. They generally thrive on being environmentally friendly, and may jump at the chance to help you out.

free grounds

Friends and neighbors are always a good source too. Especially if they share in the bounty of your harvest. This way you can sell it as they are really helping themselves by helping you. If you are brave you could leave out a bucket, pail or tote with a sign, but who knows what would end up in it. I leave that to your discretion.

I have discovered a gold mine of free used grounds. Work. We plow through coffee at work. Most offices do. Last spring I put out an empty #10 coffee can with a sign on it explaining why I wanted them. It was a hit. I was lugging home two of these containers a week. The cleaning lady even helped me out because in case you don’t know, wet coffee grounds are heavy. So I effectively removed over 10 pounds from the trash for every can of grounds I took home. It didn’t take long to fill a 60 gallon Rubber-made tote.

This year I decided I didn’t need that much. So I settled on an alternative. Like many offices, the traditional coffee maker setup is being slowly phased out in favor of Keurigs. No more buckets of grounds. Now I get bags of spent k-cups. I sent out a email to everyone in my general vicinity at work, and told them why I wanted the grounds, and that I had a bin labelled for used k-cups in my cubicle.  All it took was a waste bin from an empty cubicle and a label maker, to be in business. Once a week I get a decent sized bag of k-cups to bring home.

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K-cups from work being processed

The down side of this is, that it requires some processing on my end. You just take a knife, run it around the foil rim, peel it back, then once around the inside to loosen the grounds. Give it a tap and out they come. K-cup grounds are a finer grind. So per unit of volume you get more coffee grounds than traditional grounds. The finer grind should also help with the breakdown process, as a finer grind has more surface area. More surface area makes them more chemically reactive.

So consider this resource when you are hunting for things to compost. When organic matter like coffee grounds gets to a landfill, it gets buried and decomposes anaerobically. That means it produces methane. But by composting you help eliminate this source of green house gas. So all you organic gardeners, urban homesteaders and mad scientists need to take advantage of this resource.

Stay green. Help the planet and in turn help yourself.

A parting word of thanks to all you new subscribers. I am touched by the fact that you liked what you read enough to subscribe. I will keep trying to turn out qualify content for all of you.

 

 

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Spring Garden Preparations Continue

I had such plans for last week and this weekend. Our growing season is short here in upstate NY. Because of that, savvy gardeners like to hit the ground running as soon as it gets warm enough. I have the normal list of stuff to do such as work the beds, transplant seedlings to pots, etc. Additionally, I have an ambitious list of outdoor projects that I want to get done as well before the growing season gets underway. Some items are necessities, some are “nice to have’s”. Either way, I need nice, or at least tolerable weather to get it all done.

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Towards the end of last week, it started to rain and got cold again. Not exactly what I wanted because I had taken apart the almost 100 feet (30 m) of vinyl picket fence that was slowly being pulled down by creeping English Ivy. This Ivy had been planted in the cedar hedgerow along my southern border and just left to it’s own devices for who knows how long before I bought the house. It grew through the fence and into the lawn, in the process applying so much downward pressure on the fence, that it shattered the plastic clips that hold the sections to the posts. My only choice was to yank the fence sections out, prune back the ivy, then reinstall the fence sections using new hardware.

I could have let this go, but I have a deer problem and a dog problem. Deer want in, dog wants out. So I decided to solve both by installing plastic mesh deer netting. This would make the broken down fencing inaccessible, so the ivy/fence issue had to be dealt with first. I was not kind to the ivy……if anyone tries to sell you on the idea of a few flats of Ivy as a ground cover or border, or anything, just know that it needs to be constantly contained. And it will grow underground and pop up in other places. So you think you have it under control but you don’t.

I was also anxious to upgrade my compost bin in order to take advantage of the debris from spring cleanup as a potential source of compost. But given the location of the bin, the deer meeting had to go up first. So as you can see the ivy and fence issues were in the way of pretty much everything. To top it off, the weather was wet and cold. I needed a better option, but waiting for one would not help.

No secrets here. I sucked it up every decent, passably dry hour I could find until I beat back the ivy, and got the fence back up. Slammed home a bunch of 7′ metal T-posts I purchased at Tractor Supply and hung that netting. Hanging deer netting is no fun. It snags on everything. At one point I was like a salmon caught in a gill net. But you need to be patient, careful and deliberate. I still have a few hundred feet to go, but the hardest part is done.

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That was enough to then allow me to build my new compost bin. I already had a 4 foot (1.2 m) by 4 foot square made of 2″x 8″ lumber. My goal was to use that as the base and extend up so the bed was 32 inches (81 cm) tall sides and back, yet only 16 inches (40 cm) in the front to allow for easier working. I built this monster about 10 feet from the beds current resting place. And I grossly underestimated how much this beast weighed when assembled. Pressure treated wood is heavy stuff, and only handling one cut piece at a time, I didn’t consider the overall weight until it came time to re-position it. That took a combination of brute force and ingenuity, but I got it situated and I am a lot happier. My co-workers have been donating coffee grounds and between that and the yard waste I will generate form cleanup, I have quite a few sources of carbon and nitrogen and I expect to create black gold with this new setup.

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During the wetter hours, I managed to get most of my seedlings out of the 6 packs and into some larger starter pots. Even though I re-potted my peppers, they are still sitting on heat mats for another week. Everything got a small shot of fertilizer as well. That will help with the transplant shock. But the hardening off process has begun. My Viollete de Bordeaux fig has started to leaf out, so I potted that and it now lives outside. Soon it will go to it’s permanent home in the yard.

All told, it was a productive weekend despite the crappy weather. Sometimes you just have to suck it up and will yourself to get stuff done. Had the weather been sunny and dry, I would have gotten the garden area mowed out as well, maybe gotten some additional deer netting hung. But I am happy overall with what I have so far.

Find your motivation, make your own Eden.

Let the thought of growing things move your hands to action.

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