Slow-Release Lawn Fertilizer 20kg (44lb)

Fertilizer is excluded from our free shipping policy, sorry! This is too heavy and bulky, and our markup too modest to ship for free.

Holmes/General Seed’s lawn fertilizer is ideal for greening up your grass in spring, or to give it a boost later in the year. This mixture contains both quick- and slow-release nitrogen fertilizer, so it gives an immediate boost to green up your lawn, while continuing to work over a period of many weeks to keep your grass looking healthy.

The added Magnesium works to give your grass the desirable deep green colour. Potassium is supplied by sulphate of potash, a safe and natural form of Potassium and Sulphur, while Magnesium is added as Magnesium Sulphate, a secondary nutrient that is used to correct magnesium deficiency in the soil. Magnesium sulphate also improves nitrogen and phosphorous uptake by the turf.

The mix is 25-5-10 plus minerals.
A 20 kg (44 lbs) bag is good for 10,000 square feet (0.23 acre).

Despite the label, this is a very good general-purpose lawn fertilizer, not just for spring. Note that we are not a fan of “fall fertilizing” of the lawn. That is a time the grass should slowly go dormant and it does not need more fertilizing. Really, final fertilizing should be no later than July, and just leave the grass alone after that. For newly-seeded lawns it is safer to only fertilize after the first cutting (ie. when it reaches about 3″), to avoid burning of the still tender roots.