[Nepeta]

Why exactly do I need rocks in there?

Placement of rocks in the bottom of containers was discussed on a weekly gardening radio program I listen to faithfully. According to latest advice, this is NOT necessary.

By the way, this is a great show. I learn something every week:
http://www.ronwilsononline.com/pages/RonWilson.html

It is nationally syndicated.

If you still want to place rocks in the bottom, look in a place that sells landscaping materials, or a place catering to water gardening projects.

[Marcella]

“According to latest advice, this is NOT necessary.”

What about a compromise? I checked the storage room and there is no screen. What I do have is bunches of netting I use over plants but I have gobs extra. What if I folded that net over and over and over until it is a globbed mess and put that in the bottom, then dump some of those marbles I mentioned, over the net.

rightly, would that do it?