Colin Lea of "Rhyd Ddu" also saw the suggestion in Model Rail magazine of using 'Florera' from IKEA as ballast. He carried out an experiment 99p IKEA against £5.75 Woodland Scenics. His conclusion - Woodland Scenics is better. However I think the IKEA stuff could be useful in a yard where the ballast was going to be weathered anyway. See for yourself:
Rhyd Ddu: Woodland scenics 1 - IKEA 0 (AET)
Sunday Engineering
9 hours ago