Introduction of Container Plants
The concept of a Garden Centre, with everything in one place: plants, tools, fertiliser, seeds, bulbs and more, was revolutionary. But it was the introduction of growing plants in containers that truly changed the game.
Before this, plants were grown in fields, and could only be moved when dormant (October to March). If grown in a "tin can", however, they could be moved all year round. Dad brought that idea back with him too, and trade correspondence credits him with introducing it to the UK.
Suddenly, plants could be sold twelve months of the year, a complete revolution for horticulture.