According to Daily Mail on May 31, the multi-coloured flowers, known as rainbow roses or happy roses, are the latest thing in quirky gifts. They start life as cream roses, but the heads take on hues from various food dyes placed in their water one at a time and sucked up the stems. We know the process takes between 12 and 24 hours, but how the different petals turn out different colours. remains a trade secret. However, they do not come cheap. One stem costs £24.49 and a dozen £64.87.
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