companies fertilize plants in the spring with liquid
fertilizers. While this is fine for new trees and young
shrubs, it does little for mature trees in turf. Recent
studies are indicating that high fertilizer levels and excess
moisture through irrigation can actually encourage disease and
in turf lack oxygen more than any other element. In a recent
study, aeration, regardless of what was put in the holes, did
more for mature trees than any of the studied levels of
additional liquid fertilizers, and did not increase disease
hair roots, commonly called “feeder roots” are aerobic... they
must have oxygen. With the compaction just from running the
lawnmower over the turf thirty times a year, our lawns are
nearly devoid of oxygen just a few inches down.
we do it, (2” holes, 8” to 12” deep), allows roots to spread
to a depth they otherwise could not. Through aeration, you can
effectively double or triple the available area in which roots
can survive. The concept is the same as turf aeration, only
with larger holes, and to greater depth.
We then do
use an organic fertilizer, not because the source of nutrients
is superior, but because the carrier, or bulking agent is.
Most fertilizers use clay as the carrier. Adding clay does not
help our soils. We’re interested in permanently improving the
structure of the soil, and there is no better way of doing so
than aeration, with organics.
also the only way to overcome soil compaction from
construction. It’s imperative to aerate extensively once the
final grading is done, and to continue for several years until
the trees are stabilized.