I came across information online: to increase the lifespan of a bouquet of tulips, it is necessary to place the flowers in settled water and cut the stems straight rather than at an angle...
“For tulips, it is important to make a straight cut on each stem and add 1-2 vertical cuts about 0.5 mm deep, which helps increase the area for nutrient intake,” explains florist and decorator Yulia KHUDAIBERDIEVA. “Every day, the stems should be trimmed by about 1 cm and the water changed.
Tulips prefer coolness, so you can add ice to the water. The optimal temperature is minus 3.4℃.
One of the most common problems with bouquets of tulips is that the buds bend under the weight of their flowers. To avoid this, pierce the stem with a needle all the way through at a distance of about 3 cm from the flower head. This will ensure a greater supply of oxygen to the stem tissue, making the flower stronger.”