Peanuts are not nuts, they are legume, can fixes nitrogen at up to 250lb per acre.I would say peanut hay is as good a mulch as any hay & far better than wheat hay as a mulch that slowly rots into compost over the spring & summer.
You are in luck, I have to make my own hay.

Follow up question.I wonder if there will be residual herbicide from the peanut hay? This would be my biggest concern.I see the peanuts in the fields and the rows are clean.Probaly need to inquire about what chemicals are sprayed during the production of peanuts.

Peanut hay would be as good as wheat, oat, or barley straw when used as a mulch. That the plants are legumes means little unless the plant, roots and all, are pulled and baled since the roots are where any Nitrogen would be, nodules on the roots. Your concern about possible herbicide residues may be warranted although more and more peanut growers are switching to organic methods due to the herbicide residues found on the peanuts being higher then permissible.

How does the nitrogen get from air to the roots?
It goes though the leaves & stems, right?
Peanut vines averaged 1.7% nitrogen,0.35%phosphate,2.1%potash
That is better then any green animal manure other than
Rabbit which is the highest in nitrogen 2.4%, PV is higher in Phosphate at 0.35%, rabbit & duck is only1.4% Phosphate,
PV is 2,1% Potash, no animal manure is higher than sheep at
0.9.
Animal manure % are from Compost in Organic Garden Magazine
PV (peanut Vines) are from this link:
http://southeastfarmpress.com/peanuts/how-valuable-peanut-hay

OOPS!
(PV is higher in Phosphate at 0.35%, rabbit & duck is only 1.4% Phosphate,)
I should/ meant to say
PV is higher in Phosphate at 0.35%, only rabbit & duck are higher at 1.4% Phosphate then PV.
Peanut vines (PV) out perform most weeds & grass, & almost all animal manures. Please post any plant that out performs Peanut Vines, I would love to see the Whole List.

Here is a link that might be useful: how valuable peanut hay

About the same values I have seen listed for Wheat, Oat, Barley straw.

Really??!!
Do not keep the data to yourself, share with the rest of us.
We all are born cold, wet & knowing nothing, share a link so everyone can see & know.

There are two types of peanut hay the perennial peanut hay is most likely what the store is selling that is cut like grass and baled but they also bale the annual or edible peanut plants after the peanuts are gathered that would be tops and roots and would be better for mulch I would think

Having never heard of peanut hay nor peanut vines, led me to a few hours of google research. I've seen nothing to lead me to believe the nutrients in these products are anywhere near similar to any grain straw I've dealt with (wheat, barley or oats).

Whether either of the peanut products are good for mulch, I have no idea, but I'd use 'em.

Lloyd

Hi pt03, I saw your pics on another thread & am beginning to think your uh...Compost does not stink, no really.
Could you give me a link to the grain straw nutrients for what you use?
I know it is out there, but all I have found was people trying to sale something.

lol

Here:

Nutrient content in 2,200 lbs. of barley straw: 14.5 lbs. N, 4.5 lbs. P, 37 lbs. K, 1.1 lbs. S

and

Nutrient content in 2,200 lbs. of wheat straw: 19 lbs. N, 4.5 lbs. P, 40 lbs. K, 3.3 lbs. S.

from this article.

Lloyd

P.S. There are plenty of sources, just google nutrients in straw.

I found a chart for Comfrey/comphrey:
Water 53%, N3.o4%, P 0.4o, K 1.88, C:N ratio is 9.8 to 1.
If you like this plants nutrient.
You need to get Block 14, it is seedless & will not become a weed. You can grow comfrey in a pot also.
The plant /root is better to get a start, the the seeds.