I NEVER use garlic powder, I use the real thing. I try to have a bulb or two on hand, keep a jar of minced in the fridge for emergencies - there have been times when I've kept a bulb too long and it's either sprouted or gone powdery. It's not hard to grow, especially if you have roses - the two are mutually beneficial, almost symbiotic, and aphids hate garlic which is another bonus.