[Brendankearns]

I have an old bag of 16.16.16 fertisler and was wondering if that is to strong for a spring feed? I used it originally when sowing my lawn and it worked well.

Thanks
Brendan

[Greengage]

I would personally use 7-6-17, the 16:16:16 would be very strong for a new lawn
These numbers relate to the % of Nitrogen, Phosphorous and Potassium in the bag.
Nitrogen: Encourages plants to produce dark green leaves. This is the chief staple in the diet of most plants. Yellowing leaves means the plant isn't getting enough nitrogen from sources in the soil, too much promotes soft spindly grass, Nitrogen can leach quickly from the soil requiring frequent reapplication. Nitrogen applied in the nitrate form is usually inorganic, fast acting, but can leach quickly into surface and ground water. Nitrogen applied as ammonium is from organic sources and is released more slowly and lasts longer in the soil.
Phosphorous: Stimulates root growth. All plants need it to get their root foundation off to a healthy and vigorous start so they can support all the growth on top, but root crops and bulbs especially need phosphorous to do well. Phosphorous and potassium don't move readily through the soil and should be applied near plant roots to do the most good.
Potassium: Is important to the continuing health of all plants,Potassium is also known as potash or water soluble potash. Potassium and phosphorous don't move readily through the soil and should be applied near plant roots to do the most good. If your lawn is doing poorly I would use 16:16:16 otherwise i would use something with less nitrogen, remember the more it grows the more often it needs to be cut.

[Brendankearns]

Thanks you Greengage