mahogany, sapele, & red grandis sawdust as substrate?

I just found a decent source of sawdust. However, it is 90%  mahogany, sapele, & red grandis. My goal would be to get edible mushrooms and mushroom compost to use in the garden.
Does anyone know anything about the use of these tree species in growing edible mushrooms?

So the only thing I can find in the forum archives and elsewhere is that people have experimented with mahogany sawdust.with varying levels of success. I have found nothing in fungal literature suggesting it should not be used for edible mushrooms. I have been offered suggestions of potential mixes largely to get the particle size up and increase interstitial oxygen. I would like to use the mixes in garden beds for Stropharia, and also mix with coffee grounds for oyster mushrooms, though when I say this most folks say beds are unsuitable for oyster mushrooms.

Any thoughts?

So other than a handful of small mushrooms early last year, the two test beds haven't done much. They are covered in burlap coffee sacks to try to hold in some moisture. Last year we had biblical rains the first half of the growing season, then drought for the last. So it probably isn't the best to base any real decisions on. In March 2019, I dug through the substrate and found the mycelium pretty well worked in throughout. I then added more rougher pieces (traps more air) and covered with fresh poplar shavings. Still nothing mushroom-wise.

I figured I'd update. The two test beds haven't done much despite there being more than a cubic yard of substrate in each bed. Last year I saw maybe 3-4 mushrooms but this year...nothing. I'm trying to be patient, but they look like they might be better served being converted into rhubarb beds.

I dont know anything about the questions you asked but I appreciate you coming back to share your results.  

what is the best hard wood sawdust for mushroom farming?

I have no idea as to the best.  I am partial to Oak.  I grow Winecaps but I am a relative newby to mushroom growing.

Fresh alder sawdust is probably the best overall wood species for North American mushroom growers. It is a "soft" hardwood, and can be rapidly colonized by almost all species of mushroom when used in sawdust spawn. However, there are many other non-aromatic hardwoods that are suitable for spawn, as well as for substrates. Oak, like John suggested, is best for shiitake substrate. Unfortunately, I know absolutely nothing about what wood species might be available in the Philippines.

Cas, if you could tell us which species of mushroom you plan on growing, what kinds of hardwood sawdust you might have access to and  if you'll be using it for spawn or substrate, that might be helpful. Since much of the Philippines has a tropical climate, maybe you could grow paddy straw mushrooms, which are grown on rice straw in your country and which might be easier to find than hardwood sawdust. Welcome to permies.

Check out this link about mushroom farming in the Philippines:

https://richestph.com/grow-mushrooms-for-profit-a-beginners-guide-to-small-scale-farming-in-the-philippines/