Which flowers last well during a heatwave?

Some cut flowers cope with heat better than others. Sunflowers, gladioli, alstroemerias, gerberas, chrysanthemums and certain rose varieties are good choices for a summer bouquet. Combined with strong greenery, they can create a bouquet that copes better with higher temperatures. Even with these flowers, it is important to keep the bouquet cool, away from direct sunlight and to replace the water regularly.