Used in potting soils and propagation beds to loosen soil and prevent compaction, this volcanic rock product is uniformly sized and breaks down fairly slowly and so maintains soil structure and drainage.
Very good product for transplant mix. Has a good mix of large and fine grains, which is perfect for most cell flats. I use it in cells as small as a 200 cell flat with no problems. I don't understand why the previous reviewer felt the need to sift it, this is completely unnecessary.Review by Asbury Village Farm (on 4/22/13)
I use perlite in my seed starting, propagation, and growing mixes. For my purposes, the micronized material works well. Living in Texas, heat and dry winds can dry pots quickly, so this perlite helps root balls stay moister for longer. It’s probably a good idea to work with this perlite in a well-ventilated area and/or wear a mask.Review by Howard (on 3/21/13)
This is a very high quality perlite, yet the description is inaccurate. I have bought a couple of bags from PVO. All bags included about 20% fine to micronized matter. The manufacturer purposely includes this to increase it's water holding capacity, which I learned by reading other websites. I sift all my NorCal perlite through a spaghetti strainer while wearing a very high quality dust mask. This is very time consuming, and that's why it gets only 3 stars. There is a popular Giant Perlite #4 manufactured by a company in Nevada that should be sold here, but it's not at the time I'm writing this.Review by westcoaster (on 4/19/11)