I had got some scotts premium awhile back . When i was mixing in extra perlite i found moss growing in the soil. Was wondering what the effect of using the soil would be? Let me tell you i had nothing but a nightmare with the 3 that were in that soil with green moss . I now take them back and replace if i get moss in my soil. Scott's with extra perlite and peat do a great job.Just watch out for the old bags with the moss in them...