Here’s how you can change the order of the build modifier:
-Take your mesh to edit mode
-Select the faces you want to effect
-Place the 3D cursor to a suitable location (if using the cursor distance option)
-Choose mesh –> sort elements –> cursor distance
-Make sure you select “faces” in the toolbar properties section (the area where temporary options for various tools appear)
-Now the build order should be based on the distance of each face from the 3d -cursor. This is perfect for quickly growing things!