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My granddad says he remembers BP, that is before plastic, every thing plant wise was very expensive, if you could get it.
Wooden trays and heavy clay pots, no selection what soever alyssum and bedding lobelia whether you liked them or not, that was your lot!
When they started using plastic trays and pot that was the start of the revolution and plants were affordable and available and garden centres as we know them were born!
This is not an attack on Monty, but when some one on national (our) TV keeps coming up with hair brained schemes, because I say so, don't use this, don't use that, don't do this don't do that, if he wants to go and live in a sod hut with grass roof in the middle of a field that is up to him, but don't expect the rest of us to follow suit!