Sun hemp question

[Jacob]

We finally got our sun hemp in yesterday. I was hoping to get it planted the first of June but it didn't happen. We are trying to build up the soil in this field. We need to have a lot more top soil. The main reason we planted this was because the field was covered with cogan grass and we be spraying and disking trying to get rid of it and planting a fall and summer crop until we are ready to put it back into perm pasture. This is our first time ever planting sun hemp and I'm hoping I can bushhog it at 45 to 60 days and it will come back to get the most benifit. I was wanting to bushhog it at a foot high. Do you think it's to late in the year to bushhog and just let it go? I want to plant cereal rye and rye grass mid October in this field

 

[Red Bull Breeder]

Done a little reading on it and it seem to me you need to let it go and turn it under to get the most out of it.