Is shoots keep coming up where the tree used to be an emergency?
Within weeks. The root system is still alive and still holding stored energy, and cutting off the top removed the hormonal signal that kept dormant buds suppressed. The roots are not dying — they are rebuilding a top. That is why repeated mowing or clipping makes the stand denser: you keep removing the shoots without ever touching the reserves producing them. Shoots appearing in lawn away from the stump mean root suckering, which grinding the stump does not stop.
What changes while you wait
No safety countdown at all, but a treatment window that closes fast. Herbicide on a fresh cut works best within minutes to hours and drops off sharply after that. Seasonally, late summer through fall is the productive stretch. Wait a full year and the suckers will have rebuilt root reserves, turning a one-application job into a multi-season control program. Left alone, aggressive species keep throwing shoots for years.
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