Grass seed that is spread correctly
cannot produce a patchy lawn.
Seed germination rates are
normally around 80 - 90%. If the seed is let go dry then this
percentage drops. But because the soil dries out at different rates
then some of the seed will die sooner than the rest, leaving a patchy
looking lawn.
Remedy: 1 Sow the reserve seed
you have kept aside to fill the gaps.
Remedy: 2 Fill the gaps with pre
germinated seeds.
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