You do not want to place the fertilizer within 1 foot of the trunk and you also want to bury it into the soil at least 3 inches so it seeps into the soil and does not get washed off and lands on the trunk. Two things can happen if you place the fertilizer to close, one is that it will discolor the area and turn it rusty red and two it will be washed off and you lose your money... or your money really "goes down the drain". Worst case scenario it burns into the trunk and the canary island date palm tree dies.
and you end up like this
