For The Answer
Importance of Roots
Actual Root Spread
root radius (Gilman) = 2-4 X canopy radius
root area (Perry) = 4-7 X canopy area
Root Protection or Critical Root Zone Formulas
e.g. NADF, ISA - RPZ radius = 1 foot per 1 inch tree diameter @ DBH
USNA - RPZ radius = 1 foot per 1 inch tree circumference @ DBH
Specific – choose a plant which corresponds to your landscape need
e.g. shade or ornamental, screen or open
Site – match the biological needs of the plant with physical characteristics of site
e.g. acidic plants on alkaline soil, hydric on xeric sites
Space – ensure that enough space exists for future growth and vigor
e.g. palms under power lines, parking lot islands
WHEN - November 15th to March 15th
WIIIIDE planting hole or area & NOOOO deeper than ball depth!
SOIL AMENDMENTS – only when necessary
FERTILIZER – 8-12 oz. of a SLOW release formulation
DO NOT tamp in with feet – Use water only
MULCH – minimum of 6 feet diameter and 3 inches deep, use lifesaver approach
STAKING - only when necessary & guy lines MAY NOT be higher than 1/2 of tree ht.
Water your tree THOROUGHLY during DRY periods. Water is essential to tree survival and growth.
· For a newly planted tree (i.e., 1-2 yrs): depending on season and weather conditions, water twice a week with 2 gallons/inch caliper over entire root zone.
· For an established tree: water every 2 to 4 weeks with 1/2 to 1 inch over entire root zone.
Do not water indiscriminately! Always check soil before watering.
Mulch with woodchips or bark whenever and wherever possible
Mulch reduces: Mulch increases:
a) water loss a) organic matter
b) grass competition b) soil structure (tilth)
c) soil temperature c) water retention
Mulch should extend to cover the entire root zone (see PROTECTION).
Why? Source of nutrients removed
What? 3-1-1 ratio; 3 lbs. N per 1000 sq.ft. of root zone
How? Liquid organic soil injections are best; topical applications are sufficient.
When? Research varies. Fall probably best.
How often? As needed or every 3rd year
IN SUMMARY, PROTECT AND ENHANCE ROOTS!
Prune according to THE TEN PRUNING COMMANDMENTS. Remember that they apply not only to the entire tree but to individual branches as well.
Young tree pruning - Structure!
Mature tree pruning - Little foliage as possible
Healthy plants survive pest infestations without significant harm!