Granite dust rich in nutrients?

[aeviaanah]

I searched in wiki about granite....we got tons of this stuff around here. Not sure if the oxide form can be used by plants....any suggestions?

Chemical composition

A worldwide average of the chemical composition of granite, by weight percent:[4]

• SiO2 — 72.04% silicon dioxide
• Al2O3 — 14.42% aluminum oxide
• K2O — 4.12% potassium oxide
• Na2O — 3.69% sodium oxide
• CaO — 1.82% calcium oxide
• FeO — 1.68% iron oxide
• Fe2O3 — 1.22% iron oxide
• MgO — 0.71% magnesium oxide
• TiO2 — 0.30% titanium oxide
• P2O5 — 0.12% phosphorus pentoxide
• MnO — 0.05% maganese oxide

Based on 2485 analyses

 

[Muffy]

Some people swear by rock dust. I don't know about granite because the stuff is really hard. Shouldn't it be able to break down easily for plants to use it?

 

[aeviaanah]

Some people swear by rock dust. I don't know about granite because the stuff is really hard. Shouldn't it be able to break down easily for plants to use it?

Good point, Im not sure tho...

 

[Wetdog]

It's good stuff, most rock dust's are. It just takes years to fully break down and if you don't recycle your soil, it's kind of a waste.

I do recycle and I do add it, along with Azomite and Greensand, also slow release.

Wet

 

[aeviaanah]

It's good stuff, most rock dust's are. It just takes years to fully break down and if you don't recycle your soil, it's kind of a waste.

I do recycle and I do add it, along with Azomite and Greensand, also slow release.

Wet

Hey thanks for the response....Basically you are saying it may not be as effective right off the get, since it takes time to break down. After it has time the nutrients begin to release? Ive never heard of plants uptaking oxide forms....are you sure they are?
Got any idea of application rates?