Page 19 - Griffin Gazette Issue 2 - 2018
P. 19

100% Water-soluble fertilizer (WSF) program:
                  ICL Specialty Fertilizer Tip Sheet for Fall Mums
                       •  Ideally fertilizer selection should be based on
                         a current water analysis (contact your ICL
                         representative for more details).
                       •  A good general program would be Peters
                         Professional  15-5-25 @ 200 to 250 ppm N
                         on a constant basis.  Peters Excel  15-5-15 is
                         appropriate where a steady supply of calcium and   Keep Hydrangeas Blue
                         magnesium is needed.
                       •  Lower concentrations will work if little leaching
                         occurs from the drainage holes during fertigation.  all Summer Long
                       •  Commence feeding at planting or as soon as
                         cuttings are rooted.
                       •  WSF applications should be reduced after bud
                         formation – either cut fertilizer concentration in
                         half or clear water every other watering.

                      100% Controlled-release fertilizer
                      (CRF) program:
                       •  Osmocote  Plus (5-6 mo. in N. zones/ 8-9 mo. in
                         S. zones) incorporated at 10 to 12 lbs. / cu. yard.
                       •  Media should be used within 2 to 3 weeks after
                         mixing in CRF.
                       •  Monitor EC in root zone in first few weeks
                         especially if temperatures are high.
                       •  Select a longer term product to extend feeding in
                         the garden center and to help plants establish in
                         the landscape.
                       •  CRF will reduce nutrient loss to the environment
                         and save cost & labor.

                      Combination fertilizer program:
                       •  Osmocote  Plus (5-6 mo. in N. zones/ 8-9 mo. in
                         S. zones) incorporated at 5 to 8 lbs. / cu. yard.
                       •  Fertigate with Peters Professional  15-5-25 @
                         100 to 150 ppm N on a constant basis up until
                         bud set.
                                                                       Blue-Max  with E-Max Technology
                                                                       Specially formulated for use in the production of blue
                                                                       variety Hydrangeas.
                       •  Add Magnesium in form of Peters Excel
                         Magnitrate 10-0-0 @ 4 oz. / 100 gallons on a   Blue-Max™ features new polymer-coated E-Max Release
                         constant basis if Mg is lacking in program.   Technology™ that conveniently delivers controlled
                       •  Monthly applications of Peters Professional    release Aluminum Sulfate (Al) to create and maintain the
                         Liquid STEM™ at 2 fl. oz. / 100 gallons will   desired blue color of hydrangea flowers. With this coated
                         promote deep green foliage.                   approach, growers can deliver a sustained supply of
                                                                       Al to the plant in a safe and reliable manner. And unlike
                       •  Apply a medium rate of H2Pro™ Greenhouse and   with drenches, the consistent release within specified
                         Nursery Wetting Agent Liquid before shipping to   longevities eliminates the need for repeated applications,
                         help prevent wilting in the post-harvest phase.  saving time, labor and ultimately dollars.

                      Problem solving:                                 Item: 67-1605   Size: 50 lb.
                       •  If using 100% WSF, need to fertigate after heavy
                         rainfall to replenish leached nutrients.
                       •  As temperatures cool in the fall, purpling due to
                         cold induced P deficiency are often seen.  This
                         usually dissipates if temperatures warm up.
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