• oxide
  • elemental
Nitrogen Total (N) 28%
Nitrate nitrogen (N-NO3) 4.0%
Ammoniacal nitrogen (N-NH4) 5.0%
Urea nitrogen (Ur-N) 19.0%
Phosphorus Pentoxide (P205) 5%
Water soluble (P205) 3.7%
Potassium Oxide (K20) 5%
Water soluble (K20) 5.0%
Iron (Fe) 0.50%
Nitrogen Total (N) 28%
Nitrate nitrogen (N03-N) 4.0%
Ammoniacal nitrogen (NH4-N) 5.0%
Urea nitrogen (Ur-N) 19.0%
Phosphorus (P) 2.2%
Water soluble 1.6%
Potassium (K) 4.1%
Water soluble 4.1%
Iron (Fe) 0.50%



5-6 Months

Granule size


Avg Granule Size (mm)


Avg Recommended Rate

45 g/m²

Product Dispersal

10 days

Recommended Rate

35.00 - 55.00 g/m²

Turf Response

7 days

Sierrablen Sierrablen 28-5-5-Fe

Sierrablen 28-5-5-Fe


  • Advantages
  • Description
  • Directions for Use
  • Spreader Settings
  • Nutrition for entire growing season in only 1 application
  • Controlled Nitrogen release for 5 – 6 months constant growth
  • Nitrogen released only when growing conditions are good
  • Helps pre-stress condition of the plant
  • Controlled NPK, low Nitrogen give immediate response
  • Iron content enhances plant color
  • Can be used in low temperatures
  • Good for base feed at low rates
  • Can combine with other nutrients if needed

Sierrablen 28-5-5+Fe has enough Nitrogen content to promote continuous growth to the plant for 5 – 6 months. It contains a controlled release NPK and a low amount of readily available Nitrogen. This Nitrogen is only release during proper growing conditions; helping to pre-stress condition the plant.

Sierrablen 28-5-5+Fe can also be used as a base feed at low rates and is compatible with other nutrients. Additionally, it is equipped with Iron to enhance turfgrass color.

Directions for Use

Apply to dry foliage. Watering-in after application helps with product dispersion, gives a faster initial effect and limits traces of footprints. Avoid doing applications during frosty or drought conditions.

Applications should be made after aeration programs like: hollow tining, sliting a/o scarification in order to prevent granule damage. If spilled on concrete, pavement, clothes, etc, immediately wash off as the product can cause discoloration.


Contains Iron:
Do not apply in case of risk of contact with concrete, marble, stone, fabric, swimming pool, ... - If spilt on paving slabs, concrete, clothes etc. brush off immediately, as product may cause discolorations


Spreader Settings
Spreader type

Application method

Cone setting

Spreader width (m)

Application rate g/m2


Application rate g/m2


Application rate g/m2


Application rate g/m2


Application rate g/m2


Rotary spreader

1x pass



T 1/2





SR-2000 or Accupro 2000

 2x pass




 O 1/2




Sierrablen 28-5-5+Fe provides sufficient nutrition for the entire main growing season in just a single application.

Suggested period of use

  • Jan
  • Feb
  • Mar
  • Apr
  • May
  • Jun
  • Jul
  • Aug
  • Sep
  • Oct
  • Nov
  • Dec