Overseeding a lawn is the practice of spreading seed on an existing lawn to repair grass patches or thinning without removing the entire lawn and laying new turf.
This practice is often done in spring or autumn to thicken the lawn to drown out weeds in bare patches and improve the lush look of a green lawn. The same grass type as the existing lawn can be sown, but that is not always possible, therefore a blend is used to get the lush look as quickly as possible. Grass type ratio analysis of the seeds used is present on the seed packaging purchased. Seed products usually contain a fast-growing short lived grass to give a quick green lawn and a slower variety to develop a permanent seed type as the enduring lawn.
To start the reseeding process, make sure all frosts have finished and remove debris from the lawn. Lower the height of the mower blades one notch lower than normal and mow the lawn to expose any bald patches, but do not scalp the lawn as this will do more damage than good. Always mow a small trial patch first. For areas that have bare patches of earth, lightly run a rake over it to loosen the soil, as it is often compacted by foot traffic and mowers. Use very fine soil, such as Searles Lawn Top Dressing, to fill and level your soil. Lightly water, then apply the seeds evenly over the lawn area. Since the ground is already moist, only a gentle wetting is needed now, too heavy and the tiny seeds will wash away causing them to clump in low areas.
Keep the watering regular and gentle, a weekly dose of Seamax Organic Fertiliser in between regular watering will encourage a stronger lawn, as well as enhance seed germination performance. The seedlings of the lawn are tender and will perish easily if allowed to dry out or if a strong fertiliser is used too soon. Once the thickening is evident, a granular lawn fertiliser can be used. Remember to always read the back of the bag for how often to repeat the fertiliser and how much to use. Not all fertilisers are the same and again too heavy handed will cause issues with the seedling. Once the lawn is established go back to your regular watering routine.
Overseeding a lawn can be done in autumn, before frost and not when the temperatures are too hot. Spring or late winter is often favoured, though this can vary from state to state and if the weather is unseasonable. Bragging rights for a lush green thick lawn can be yours.
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