I originally purchased this on recommendation from a YouTube orchid grower. After about a year and a half of use, I suddenly have multiple flower spikes on several of my orchids! One even has two splits and one coming off of an old spike too. This makes an amazing difference.
Like many other reviews here, my granules also changed color. I had them in my pantry, which I thought was pretty dry, but on my second use I found they had turned whitish and clumped. (Surprisingly, the diluted mixture still turns slightly blue.) It did not have the mold odor that others mentioned, so I have continued to use it with no problems. It takes very little.. I use one teaspoon per gallon of Brita/tap water, for every watering, and double it once or twice during the growing season.
- I have since found that placing it in the fridge keeps it dry, but I also minimize the time it is out of the fridge so it doesn't pick up condensation.

I fed my orchids with this fertilizer and 4 days after I could see new roots coming up! I'm very excited

Perfect orchid fertilizer

Excellent orchid food.

As you can see from the pictures, my orchids look great from using this fertilizer. I highly recommend. No flowers because they usually bloom in February or March. I had been ignoring them, but now that I have recommitted to them and am watering them more with this fertilizer and a little kelp, they have really grown and are now super healthy. I am hoping next year they will all bloom.