posted 14 years ago
I am doing sheet mulching over grass also though not in a hoop house. The first year I did it, it was over piled up dirt that had been sort of construction rubble, in a very dry climate, with a bunch of weedy oats in and all around (the ones that have seedheads called "foxtails" that stick in animals' coats like burs..... can't recall the name of the plant other than that.)
anyway, it worked excellent well in that climate. I used cardboard and newspaper when I ran out of cardboard and then piled up on top whatever I could get my hands on in the way of compost manure soil and mulching material. Tried to mulch with dried leaves I raked up without crushing them as I had no way to do that, wet them down real real good and they still dried up and blew away. Twice.
It still worked.
Doing it here in a wetter climate, on top of healthy turf, is a new one but we shall see.
In terms of your manure, I would choose the horse from that array, just because I think it is safest (less likely to burn plants if it is too fresh -- don't use the others unless they are months old I'd suggest). each one has its own properties though and with that much to choose from you can learn over time which is best for which application (abundance!) Layer the manure with straw and compost if you have it. Pile it up as thick as you can up to about 6 inches or so, and give it some time to settle if you can. If you have to plant it right away, well, water it in real well first and think about your layers more carefully as they will not have time to decompose and meld....... so in that case I'd put straw on the cardboard, then as much older compost mixed with soil as you have, top dress with a manure that is not too hot and then more straw on top, try to wait a little bit to plant in that even.
Watch out for the hay as it will have seeds...... but if you compost it first it will add more nutrients than the straw will..... you probably know all this already.
Probably people here know way more about this than I do! But I am indulging myself here. I love sheet mulching, it works so nicely when it works.
Here I have a light straw/hay mulch on the far bed and chopped up leaves on the near bed. I didn't have enough of either to do them both the same.
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