Tumbleweed wrote:

They are beneath the gravle and coming through the sheeting. I was
considering sodium chlorate to kill them off for good. Any opinons?

Andy

can you still buy that? I thought it was banned? Anyway, i'd go for
pathclear.

Sodium Chlorate is still available, I have used both it and Pathclear
on our gravel drive and neither works very well. We must have tough
weeds or something, it may be that tre drive slopes and is very well
drained and thus the weedkiller gets washed out very quickly.

--
Chris Green