Looking at perlite, they have 3 grades
	
		
 I am in organic soil, which is the best for me? 
							
						
					
			
			
				The #4 is the largest perlite on the market and averages a whopping size of around 1 inch. The #3 measures around 1/2 inch and the Coarse is about 1/8 to 1/4 inch.
			
		
	
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