How often should you overseed your lawn?

Grumpty's answer
Every 12 months
Why bother
Skip it and bare patches just hand the ground to weeds. A thorough-tier job. Skippable when life's busy, worth it when it isn't.
Why it's a range
Thin, busy lawns want it yearly. A thick, healthy one stretches to every two or three.
When to start thinking about it
Give yourself about 7 days' notice. That's when Grumpty starts grumbling, so it doesn't land on you the day it's due. Mark it done and Grumpty sets the next one, every 12 months, so you can go back to forgetting it exists.
Let Grumpty remember it for you
Add it once. Grumpty tracks the date, grumbles when it's due, and rolls it forward the moment you mark it done. No spreadsheets, no sticky notes, no forgetting.
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