I can't see why Rolawn can't use a biodegradable mesh. Ok, hessian would be too close a weave - but I'm sure something could be developed... how about this sort of thing: https://www.geofabrics.co/products/jute-mesh
Since 2019 I've lived in east Clare, in the west of Ireland.
It'll be all about the profit margins, @Liriodendron. If it costs a wee bit more to add a different type of mesh, you can be pretty sure the case for any mesh at all won't be nearly as persuasive. After all, grass roots themselves are a pretty good plant-based, biodegradable mesh, but they take time to develop. And time is money!
'If you have a garden and a library, you have everything you need.'
Can they not make an open mesh out of string or similar? It doesn't have to be a close weave like sacking. Admittedly, it would be more expensive than plastic but if you want to industrialise horticulture, it must come at a cost. The teabagging of plants to facilitate a production line is a similar case.
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https://www.geofabrics.co/products/jute-mesh
We have managed for hundreds of years with out it.