"Sacha" wrote in message
k...

[snip]

The ground will be available straight away if you plant something in
the
middle of the hollow ring. If you wish, you could then plant
another
'something' to take over from the ring, too. What it gives you is
the
choice, I suppose. But why don't you go to the Bressingham site and
have a
look?

I think I am beginning to understand the shape of the object you are
trying to describe, but it does not correspond to the simple
sieve-like shape in the picture of the URL which Martin originally
posted.

I had a look at the Bressingham site some time ago and I could not
find anything to do with bulb planting pots. That is probably just my
general ineffectualness. I will have another look.

Franz