I have a chance to get free mushroom compost from a mushroom farm this weekend but before I load up my car, does anyone know if this is good medium to grow cuttings or to use on fig trees? Any insight is appreciated. Thanks!

It is great to use as part of potting mix, not sure about cuttings, may hold too much moisture?

Personally, I would not use it for cuttings. Keeps the medium too moist for prolonged time (causes rot). You can use it (20-40% in potted trees, along with potting mix and large perlite), and can top dress the in ground figs with it.

Navid.

Not a big fan of mushroom compost;
 - contains pesticide residues left over from growing the mushrooms.  
- it is mostly spent and has little nutritional value this is why they are replacing the media.
- It does have trace minerals good for the soil but toxic to seedlings (probably cuttings)

I wouldn't use it for my potting soil mixes but would use it to amend the soil for flower beds and ornamental trees.

I had some mushroom compost analyzed by Rutgers about 10 years ago. At the time I had it analyzed it was about 1 year old in my yard. It came from a mushroom farm in PA. I only had it analyzed for Potassium and Phosphate and trace elements not Nitrogen. However the reaction of plants I grew in it told me it was high in Nitrogen. It was very high in Potassium and Phosphate (high but balanced). Had sufficient micro nutrients and was mildly basic (7.1 I think).

I did not have it tested for pesticides. But if there are pesticides it is not from growing mushrooms. The mushroom growers sterilize in with heat. Then they innoculate with the mushroom spores. I do not believe they use any pesticides in the growing process.

Edit: Well, never mind that. Apparently Pino is right about the pesticides. Unless grown organically they do use pesticides to grow mushrooms.

Meg - no experience here but I don't think you'll get a definitive answer unless you try it yourself.

If you need some cuttings for a test just let me know.  I'm curious to see how this turns out.

I believe that the best answer came from

http://figs4funforum.websitetoolbox.com/post/show_single_post?pid=1292455279&postcount=52&forum=0

For all of my container trees, I use mushroom compost. I wish I could get it free!

I tried free mushroom manure and free soybean waste before, Their quality are not consistence and might need big labor for your application, You might need to try it out and decide that you can use it. this year, I pay $20 per yard to get composted mushroom manure from nursery because their quality is much better just like top soil.

I up-pot well rooted cuttings into Mushroom compost and have had no issues.  It does hold more water but it also seems to allow for good air circulation. I do add a bit of lime and fertilizer about 7-10 days later and so far, so good. I have yet to loose a fig while I was loosing some using various potting mixes in the past.

I have used 100 percent mushroom compost in my SIP's for many years with great results (as per Bills Figs). I have never tried it on cuttings. I don't think I would use it to root them and then would only use it as a supplement with a lighter mix once they are newly rooted
I would also take all I could get at that price

I echo what Coop said. All my SIPS has 100% compost too.