I found a broken link in an NGA Article. Do you want to know about those?
The various "plant care guide" NGA articles were helpful and address a lack of basic "how-to-grow-101" information in the plant database, despite the "parent plant pages".
The article:
http://garden.org/learn/articl...
"A Solution for Heavy Containers"
The broken link is called "Better Than Rocks."
http://betterthanrocks.com/ind...
This could replace it
http://betterthanrocks.com/pro...
But this one has a smidgeon of
actual information, unlike the site above.
https://better-than-rocks.mysh...
I have to say, that first one was the LEAST informative website I've ever clicked on! (Not an NGA website, just a one-product vendor).
P.S. I wonder if glass wool, fiberglas insulation or even pads of felt or batting would also work?'
(The product is a non-woven pad of recycled plastic that takes up space in the bottom of big, heavy planters that are deeper than you need a root zone to be. I think people have also used beer cans and empty soda bottles for that purpose. Even Styrofoam packing peanuts.)