Deep Root Feeding
I have been asked my opinion many times on deep root feeding and of course being naturally opinionated I give it. First of all, I would ask you to take a moment to think about how nature works. I was taught there are two types of bacteria - aerobic - need oxygen and anaerobic cannot take oxygen (it kills them) Deep root feeding originates from something above ground - containing oxygen. This feeding kills the aerobic bacteria (the feed) and because they are forcing oxygen into a area that can't stand oxygen they kill it too. Not to say that this will go to waste, it won't. but will do no good until it becomes food for anaerobic bacteria. This takes time.
If you ask a lawn-care, landscaper or even the person doing the deep root feeding about the parts of a tree, they would likely include the anchor (the trees deep roots) and the feeder roots (found around the drip line of the tree - the outside edge of the foliage) If this is the feeder roots, why then are we trying to do a deep root feeding on an anchor root?
Would we not be better to make about an 18 to 24 inch (50-60 cm) hole about the size and depth of your little finger, all around the drip line. Because this is a drip line the feeder roots are near the surface so when the water drips it doesn't have to penetrate deeply. (nature is not just a word as some would think or have you assume) Fill this hole with a natural plant food solution from The Natural Way Plant Products Ltd. or the product of your choice. It is easy to apply too much chemical fertilizer and burn or harm your plants. Use natural product - less product - more ofter - better results. Then water well.
For what it's worth ------ that's my opinion
Harold