I have no problem chopping up nuts and seeds. I can grind them medium fine or course. I have made my spice blend using the Ninja and a small coffee grinder. I use the coffee to my a powder from the spices since spices are hard fiberous seeds. The coffee grinder has a hard time breaking down the spices but the Ninja has a hard time making the spice into a powder but can break down the seeds to a course mixture. I mixed cardamon (a hard spice), black pepper, fenugreek, cumin seeds, mustard seeds, and cinnamon sticks. I have also chopped almonds, walnuts, pecans, chia seeds, flax seeds and oatmeal, wheat berries and unsweetened coconuts flacks to make my protein bars. The blades are stacked in tiers of 3. So it pulls the food down when chopping and blending. One thing you need to do if you are blending fibrous vegetables like carrots or kale you need to add water. It helps break down the fibers and makes them much smoother but not completely juiced. But you get all the nutrients from the whole fruit and vegetable. I bought my blender at Target for $150.00. But if I researched a little harder I could have gotten my blender cheaper in price, that shucks.