• oxide
  • elemental
Nitrogen Total (N) 10%
Ammoniacal nitrogen (N-NH4) 2.1%
Urea nitrogen (Ur-N) 7.9%
Phosphorus Pentoxide (P205) 5%
Water soluble (P205) 5.0%
Potassium Oxide (K20) 15%
Water soluble (K20) 15.0%
Magnesium Oxide (MgO) 5.0%
Water soluble 2.5%
Calcium oxide (CaO) 2.0%
Nitrogen Total (N) 10%
Ammoniacal nitrogen (NH4-N) 2.1%
Urea nitrogen (Ur-N) 7.9%
Phosphorus (P) 2.2%
Water soluble 2.2%
Potassium (K) 12.5%
Water soluble 12.5%
Magnesium (Mg) 3.0%
Water soluble 1.5%
Calcium (Ca) 1.4%
Sierrablen Plus Autumn & Winter with Pearl® Technology

Autumn & Winter with Pearl® Technology


  • Description
  • Advantages
  • Directions for use
  • Spreader settings

We have added Ostara's Pearl® Technology to our premium controlled-release Sierrablen Plus fertilizers and it is providing significantly increased rooting and more efficient nutrient use over traditional ammonium-phosphate sources. With Pearl Technology we have eliminated the risk of phosphorus leaching into the environment or it irreversibly locking onto soil particles: Pearl only releases in response to organic acids produced by the roots and therefore will be taken up as per the plants requirement.


The key benefits of Root Activated™ continuous-release phosphorus, including increased turf rooting density and better phosphorus use efficiency, have been proven through published independent research trials in the UK and US.

  • Controlled-release Poly-S nitrogen for strong turf response and 3+ month longevity.
  • Root-activated™, continuous-release phosphorus, nitrogen and magnesium resulting in increased rooting.
  • Contains Polyhalite with K, CaO and MgO.
  • Circular nutrients N, P and MgO recovered from phosphorus-rich water streams.
  • Earlier harvest time when used for turf production.
Directions for use
Maintenance application
Apply the fertilizer after mowing with a spreader
Spreader settings




ICL SR2000 or Accupro 2000

Spread Width

4.5 m

Cone Setting




Application Rate









Single Pass

L ½


M ½


N ½

O ½


Double pass

K ½





L ½




Sierrablen Plus Autumn & Winter includes Pearl® Technology, a unique Root Activated™ continuous-release phosphorus recovered from phosphorus-rich water streams. A late summer and autumn fertilizer with higher potassium to maintain turf health leading into the period of increased disease pressure and winter. Lower N levels help maintain steady growth.

Suggested period of use

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