Hi,
Have just (mechanically) cleared 0.25 acres of old and impenetrable rododendron, and having removed the roots, will rotovate and overlay with 6" of soil/sand/loam mix before laying a new lawn.

However, I'm expecting some potential problems:

First, I'm aware that the rhododendron is toxic to other plants, and I'm trying to understand what may not be plantable in the reclaimed land (ie. lawn, laurel, fruit trees etc). And also what might be done to neutralise this effect.

Second, I'm aware that there is likely to be rhododendron seeds left in the ground, which will doubtless sprout. Will glyphosate neutral these, or do I require something different, and will that be fine to seed lawn in mid September.

Any help appreciated.
Kind regards,
David.