The Sierrablen Range of large controlled release fertilisers feature resin and/or Poly-S coatings which rely on soil temperature as their mechanism of release. The longevity is determined by the thickness of the coating.

Sierrablen Large	38+0+0 (4-5mths)		20kg
	High Nitrogen controlled release suitable for coarse mown turf, i.e. sportsfields and roughs. Cost-effective -> high analysis with low application rate. Application Rate = 20 - 30g/m2. Pack Coverage: 666 - 1000m2
Sierrablen Turf Mix	28+5+5+Fe (5-6mths)		20kg
	Fast start portion of Nitrogen for immediate response even at low soil temperatures. wProven history of use even as a base fertiliser in new course 'grown in'. Application Rate = 35 - 50g/m2. Pack Coverage: 400 - 570 m2
Sierrablen Turf Mix	15+0+22+Fe (5-6mths)		20kg
	Controlled release NK. Fast start Nitrogen, Potassium and Iron for immediate response Application Rate = 35 - 50g/m2. Pack Coverage: 400 - 570 m2
Sierrablen Turf Mix	27+5+5+Fe (8-9mths)		20kg
	Lower amount of fast start Nitrogen for gentler response. Application Rate = 40 - 60g/m2 Pack Coverage: 333 - 500m2
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