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There’s nothing I love more than fresh flowers to add a splash of vibrant color to any room, especially during summer.But, as the outdoor temperatures soar, my indoor spaces tend to trap that heat, which can quickly take a toll on my beautiful blooms. And it’s always disheartening watching those vibrant, lively blooms quickly droop and lose their freshness — so soon after I’ve bought them.Besides the obvious of moving them away from direct sunlight, I called on a florist to offer advice on how to prevent flowers from wilting in a heatwave. Not only are these simple, but they will help to extend their lifespan (and save me money!). Here are the 3 top tips to ensure you have longer-lasting flowers this season.1. Don’t forget to change the water more frequently

A pitcher pouring water into a vase next to a bouquet of flowers (Image credit: Shutterstock)It's very easy to forget changing your vase water regularly, especially if it looks clear. But scorching heat and high humidity offer the perfect breeding ground for nasty bacteria to thrive.“One trick people usually miss is changing the water in their vase,” adds Vicky Salmon, florist at Interflora.“Bacteria love warm weather, so in a heatwave they’ll be busy growing in that lovely fresh water you’ve given them. Take the time every other day to empty your vase, give it a clean and fill it with fresh water and your blooms will love you for it.”Bacteria love warm weather, so in a heatwave they’ll be busy growing in that lovely fresh water you’ve given themVicky Salmon, florist Also, don’t forget to clean your vase too, especially if the glass has turned murky or has stains. If you want to eliminate the scrubbing, check out these hacks for cleaning a flower vase and get it sparkling again. Get instant access to breaking news, the hottest reviews, great deals and helpful tips.2. Relocate to a bigger vase