Gary from Perry, Fl writes
We do have Prime Source Indicator Blue SG. This is water soluble granule that could potentially be mixed with a granule and applied to the soil. You may need to wet the lawn first in order to see where the product has landed. Do be mindful that with most insecticide granules, they are falling beyond the thatch layer and so will the Prime Source Indicator Blue SG. This will in turn turn the soil blue and you may not be able to see exactly where the product was applied.
Answer last updated on: 02/18/2016