By Gemma Aldridge Nothing cheers up a miserable day like a bunch of fresh flowers. But with prices for cut stems rocketing in the cost of living crisis, many of us see them as a luxury we can no longer afford. Brexit, the climate crisis affecting crops and the price of fuel for deliveries have all led to an increase in the cost of the bouquets that bring us such joy, in recent years. And if they only last a week or two, it’s easy to see why people might chose to spend their money on other treats. But now one flower expert has shared a tip that could make your posies last twice as long for a fr…