by Robert Pavlis Deep root fertilization is a recommended procedure by many arborists, and equipment is available for DIY homeowners. Is it the best way to fertilize trees? Do they need to be fertilized? In deep root fertilization for trees, you stick a pipe into the soil about 6” to 12″ and then, under pressure,…
Garden Myth: Deep root fertilizing is good for trees — Gardening Channel
The Rose Cauldron 
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