Storing grass clippings without mold?

DonyaQuick

Crowing
Premium Feather Member
Jun 22, 2021
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Upstate NY (Otsego county), USA
I have a reasonably large "lawn" that I mow with an electric mower. I just started using grass clippings in my run (not the coop) after reading about it on here. My clippings are only part grass and have a good mix of clover and other edible plant goodies, and it also has really helped to control mud in the run. I had way more grass clippings than I could reasonably put in the run all at once, so I tried to store some in a plastic cart in an open shed to keep it dry. That worked for a bit and I was able to use a little bit more of it a couple days later, but a few more days later I found the rest soggy and moldy at the bottom despite being protected from the rain. I'd like to figure out how to store future clippings better and for longer since it's a free source of material for the run that also gives the chickens something to pick through for snacks. I could try to spread the fresh clippings really thin on a tarp to dry quickly in the sun, but unfortunately I doubt I'll be able to get enough sun to both mow and dry before it rains again! Is there some other trick I can use to dry and store grass clipping without it molding when it's cool and humid? Would storing the excess fresh clippings in something like burlap or a hay net help at all (vs the solid-sided cart I already tried)?
 
You'll have to treat it like hay, cut it and let it dry for a while, flip it over and let it dry some more. Even if you protect it from rain, if there is any moisture left in it after cutting it will decompose. That's where your mold, mildew and heat come from.
It's probably easier to put it all in the coop/run and let the chickens toss it around and rummage through it.
I usually rake up and dry some of my first bush-hogging each year for nest box filler.
 
Also be real careful because look up spontaneous hay fires.

Oo! Yikes, I had completely forgotten about that issue. Back when I was a kid my family had horses and I remember now that my parents were warned about that with a giant mound of hay bales they made on pallets under a tarp in the summer heat (they did it anyway but in retrospect it was super risky - that thing got HOT inside). Alright, that just scared me out of the idea of building up enough of a store of it in my shed to use over the winter.

Why not just put it all into the run and let the chickens have at it? My extended run is like a big compost pile at this point, the ground is sloped and the low-side fence is holding back like 18" deep material and the chickens love it

I'd like to go the composting run route - but I worry I could grow a bunch of mold in the run itself if I'm not careful about how much new stuff I pile up at once. That's the original reason I was trying to save it for later, so I could add it in small amounts and ensure that it dries quickly in the run. I will probably have another break in the rain to mow some of the area this weekend. Depending on how low I mow it, I would guess the one mowing will result in up to 3-4" of new material. Too much to add in one go? Or is that amount of fresh plant material ok?
 
Depending on how low I mow it, I would guess the one mowing will result in up to 3-4" of new material. Too much to add in one go? Or is that amount of fresh plant material ok

How big is the coop and/or run you're using the lawn clippings in?

I find that a mix of different materials -- wood chips, wood shavings, straw, pine straw, leaves, lawn clippings, etc. -- is superior to a single material used alone in either coop or run but particularly in the run where the mixture types and textures seems less likely to pack and mat to create anaerobic pockets.

Coarse wood chips are the best for mud (in addition to fixing any drainage problems), but lawn clippings are a great supplement.
 
How big is the coop and/or run you're using the lawn clippings in?

I think it's somewhere between 35-40 square feet. This is just for the secure run area in front and underneath the coop (coop itself has pine shavings). I'll be building an extension soon but have some unexpected design challenges I'm still trying to sort out with it. The extension I'm hoping to add would be several times that area and then the volume of clippings going in will of course be a lot thinner than in the current run.

I find that a mix of different materials -- wood chips, wood shavings, straw, pine straw, leaves, lawn clippings, etc. -- is superior to a single material used alone

It won't be just clippings going in, it's just what I have in the most abundance right now. Pine shavings have been getting stirred into it in places, a good many leaves get in there from trees that are shading the area, and I would like to add some wood chips if I can find suitable ones. I've been having trouble finding wood chips though that aren't treated in some way.

Coarse wood chips are the best for mud (in addition to fixing any drainage problems), but lawn clippings are a great supplement.

My mud issue isn't deep mud or standing water - more like a thin mud slick. The soil has a lot of clay in it and is full of rocks starting about 1-2" down. The chicks have dug down there in some places which is good and gave them nice dry dust baths, but in other places they packed it down hard and it somehow became about 1" of dense, relatively dry clay with a thin layer of very wet, very slippery silty mud and poop that wasn't getting stirred down and wasn't getting absorbed by anything. The grass clippings somehow helped return things to a substrate that the chicks can dig into, so now the slippery layer is getting stirred in and dried up.
 

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