Espoma Berry Versus Synthetic vs. 2 Bags Tested...Harvest Surprises! We’re often torn between organic and synthetic fertilizers, but after trying Espoma Organic Berry-Tone 4-3-4 alongside synthetic options, the results surprised us. The 4-lb. bags felt substantial, packed in a pack of two for steady gardening trips. Applying the Berry-Tone was straightforward—our berry bushes greedily soaked it up, thriving even in our patchiest soil. Its balanced 4-3-4 NPK formula felt more gentle on the roots, with a faint earthy sweetness rather than synthetic harshness. After weeks, our harvest came through bountifully, plump and juicy—the organic root readme proved its worth. While synthetic options boast speed, Espoma’s natural approach delivered steady growth without the guesswork. We’ll stick with Berry-Tone for our berries from now on.