I did an experiment between Peat Moss based potting mix ( Aurora 707 ) and Coco/Perlite mix (Royal Gold ) . The expectations were that the coco medium will dry much faster and the peat moss based medium will hold much more water . Here is what i got :
- I fill 5 inch containers with dry medium from each mix , the result was expected the Peat Moss based pot was heavier : Coco - 539g , Peat Moss - 692g; 153 grams heavier .
- I fully saturate them with water : Coco 949g, Peat Moss 1167g; The water capacity of the Coco was 410g versus 475g of the Peat Moss; Its interested per gram Coco mix holds more water (0.761 per G vs 0.686) then Peat Moss . But we care more about the volume , so its not wrong when we say Peat Moss holds more water ,but its not so drastic !
- I left them on sun so they can dry after two days i got this results : Coco 612g vs Peat Moss 804g , or the Coco lost 333g vs Peat Moss 363g; actually the Peat Moss lost more water per volume , but not per gram ( Coco 0.625g vs Peat Moss 0.524g ). Conclusion there is not a big difference as i thought , actually surprising results that Coco hold more water per gram, and that Peat Moss losing more water in total ! Your thoughts ?! Coco or Peat Moss base mix ?