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Fertilizer

Fertilizers

STARTER FERTILIZER – 16-16-16
Balanced ratio of Nitrogen, Phosphorus, and Potassium. Recommended starter fertilizer for new sod and seeding. Also good for gardens and flower beds.

STARTER PAK – 16-16-16
Provided with each 600 sq. ft. pallet

PRO SPRING – 12-2-8 12% FE (25% slow release)
Commercial spring fertilizer with high Iron for moss control. Contains Hydrolene for extended releases.

PRO SUMMER – 28-7-14 40% SCU
Summer maintenance fertilizer containing 40% slow release Nitrogen (sulfur coated urea). Provides feeding for 6-8 weeks.

AMMONIUM SULFATE – 21-0-0
Quick release source of Nitrogen and Sulfur. For fast green-up. Apply if RED THREAD is present. Can burn easily, so water in right away.

HIGH PHOSPHATE & POTASH – 10-20-20 (sulfur)
Starter fertilizer or for fall application. High Phosphate and Potash formula places these hard to move plant foods into the future root zone for best utilization. Aids plants in developing resistance to disease, drought, hot and cold temperature extremes.

DOLOPRIL – PELLETED LIME
Quick acting pelleted Dolomite Lime, supplies both Calcium and Magnesium-Carbonate. Easy to apply with a broadcast spreader. Apply in early spring or late fall to establish turf; or incorporate into soil when preparing for new sod or seed.

What do the Numbers Mean?

All fertilizers have a label which list the percentages of the three major nutrients that they contain in the following order N-P-K. Which means that a fertilizer listing of 28-7-14, for example, is 28% N (Nitrogen), 7% P (Phosphorous), and 14% K (Potassium). Some fertilizers contain additional trace elements, slow release sources of nitrogen and/or organic sources of nutrients.

N = Nitrogen (N).
Nitrogen is the first number in the analysis of the bag. Nitrogen is a component of chlorophyll (responsible for green color of plants). Nitrogen is required for nearly all growth processes in turf. Nitrogen is important for new and established lawns. Top growth occurs at the expense of root growth, so excessive amounts of Nitrogen can restrict root growth.

P = Phosphorous (P2O5).
Phosphorous is the second number in the analysis. This nutrient is for root development and is especially important for young turf. The rapid growth associated with germination requires phosphorous, therefore is essential in starter fertilizers. Less is required in established turf.

K = Potassium (K2O).
Potassium, also know as Potash, is associated with the plant's ability to withstand stress. When supplied to the plant along with adequate amounts of Nitrogen, potassium thickens the cell wall. This makes the plant better able to withstand drought, insects, disease and temperature extremes.

How Much Do I Use

  • The amount of fertilizer to apply to established lawns is based on the nitrogen level.
  • The recommended amount of nitrogen to apply for Western Washington is 4-6 pounds of "actual nitrogen" per 1000 sq. ft. of lawn area per year.
  • Fertilizer should be applied 4-6 times per year, with each application providing approximately 1 lb of "actual nitrogen" per 1000 sq. ft.
  • The nutrients on a bag of fertilizer are expressed as a true percentage by weight.

Example: 28-7-14 contains 28% of N, 7% of P, and 14% of K. This means that every 100 lbs of 28-7-14 contains 28% or 28 lbs of nitrogen (N), 7 lbs of phosphorous (P), and 14 lbs of potassium (K). (i.e. 100 lb x .28 (28% expressed as a decimal) = 28 lbs).

Therefore, we need to apply 3.5 lbs of 28-7-14 fertilizer to get 1 lb of nitrogen on our 1000 sq. ft. lawn.