Thanks Sean, that's good to know.
You know your stuff. I'm just seeing now the 8-9-12 on the package. The smaller spikes I was using are only 13-4-5. That's even less phosporous! Now I'll keep my eyes open for the rose or tomato variety.
Shanna, there are 18 fat spikes in this package. Package says they are recommended for potted plants and hanging baskets such as marigolds, pansies, petunias, geraniums, impatients, vincas, chrysanthemums, begonias and primroses.
Maybe these spikes will go the my favorite land plant, the chrysanthemums, named Annette, btw.
Thanks for the education, Sean