You can plant grass seeds over dead grass, but it's not always the best approach and success isn't guaranteed. Here's a breakdown of why:
Why it might work:
* Minimal thatch: If the dead grass layer is thin and loose (minimal thatch), new seeds might be able to penetrate and germinate.
* Good soil preparation: If you've prepared the soil properly beforehand (raked, aerated, fertilized, etc.), the new seeds might have a fighting chance.
* Specific grass type: Certain grass types are more tolerant of competition and can establish themselves even with some existing vegetation.
Why it might not work:
* Thick thatch: A thick layer of dead grass (thatch) can block sunlight, water, and air from reaching the new seeds, preventing germination.
* Competition: The existing grass roots will compete with the new seedlings for nutrients and water, making establishment difficult.
* Disease: Dead grass can harbor diseases that can harm new seedlings.
* Poor soil conditions: If the soil is compacted or nutrient-deficient, new grass will struggle regardless of existing grass.
What to do instead:
* Remove the dead grass: The best way to ensure new grass thrives is to remove the dead grass entirely. This involves dethatching, scalping (cutting the grass very short), or even removing the entire layer of dead grass.
* Prepare the soil: Once the dead grass is gone, prepare the soil by raking, aerating, and adding fertilizer to create a suitable environment for new seeds.
* Choose the right grass type: Select grass varieties that are suitable for your climate and soil conditions.
* Properly seed and care: Sow seeds according to the recommended density and depth, water regularly, and protect the new seedlings from pests and diseases.
In short: Planting grass seeds over dead grass is possible, but it's a risky gamble. The best approach is to remove the dead grass and prepare the soil properly for a successful and thriving lawn.
