Round-up Plant Back Restrictions for Grass Hay

Got a field with whatever native grasses are on it. I'd like to take a very early cutting next spring and then hit it with Round-up and plant Teff afterwards.

Later that year, I'd like to hit the field again with Round-up and fall plant Timothy.

Anyone know the plant back restrictions for Timothy and Teff for glyophate/Round-up for these grasses? I don't see any specific reference to them on the label - maybe I'm missing. Absent the label, anyone have experience planting Timothy or Teff after a Round-up application?

Thanks!
Bill

Round-up Plant Back Restrictions for Grass Hay