"Bumblebees need a range of flowers that come in to flower at different times and that is what you find in traditional grasslands, " she said.
BBC: Guernsey bumblebee species under threat says expert
For example, honey resulting from various flowers is less expensive than from a single kind of flower.
FORBES: Today's Mystery: Europe's Bees Disappear Yet Honey Increases
Organisers of the Spalding Flower Parade said they might have to import the flowers from France because the UK variety was still a "vista of leaves".
BBC: Spalding Flower Parade hit by tulip shortage
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