What sort of soil do you have? Dogwoods need soil with lots of organic matter, well draining and slightly acidic. But they must also stay moist. If your soil doesn't drain well or if you aren't watering enough, your tree will have problems. I don't think the Plant-Tone is supplying the right nutrients to your tree. Organic fertilizers work on the assumption there's something in the soil that, with the addition of the organic fertilizer, will jump start the soil. Unless there is lots of organic material already in the soil, they don't work as well. Instead of fertilizing spring and fall, fertilize early spring, early summer and mid-summer. Switch to something with more nutrients and especially more nitrogen.
