All untreated granular or liquid ferts tend to 'wash out' or leach from containers pretty readily due to the watering frequency. And in fact, flushing the containers fully when watering is recommended to encourage this washing out to avoid a build up of fertilizer salts.

Is there a reason you do not use a complete fertilizer that offers a full range of necessary micronutrients, like Dyna Gro's 9-3-6?

I'll have to pull up a spec sheet but I *think* what I bought I was under the assumption was prilled CRF but it's not. It's from Florikan. No fertz in this mix. Just micro. I do have the DG but sometimes if the liquid schedule goes amiss, I was thinking the Prills might be a more better way to go. Well, too bad it ain't prills.....