Last year at a club raffle, I won a bag of Peruvian Seabird Guano fertilizer made by Sunleaves.
This is labeled as an all natural organic 12-11-2 fertilizer and is pelletized. Since I had never used it before I only tried it on a couple of procumbens nana junipers I had that were not looking very happy, foliage color was off and looking dull. It had very little odor and I just sprinkled a hand full on each plant's soil surface.
No critters seemed to have any interest in it and it slowly broke down over about six weeks. At first I didn't notice anything great about it but this spring those two plants are growing like crazy and have an amazing deep green vibrancy that l haven't seen in my junipers before.
I found out that many hydroponic supply stores carry it, so yesterday I went and bought two more bags. They are a little over two pounds each and cost in the $10 dollar range. I will use them on my other junipers and some other plants this year.
I would recomend trying it if you can find it.
Bob O