HYDRATE - SUNFLOWERS ARE THIRSTY
Cut stems to fit your vase, at least 1" (2cm) at an angle to increase its intake of water. Be sure to use pruning shears and avoid smashing or piercing the stem.
Fill your vase with clean cold water and dilute the packet of flower food granules in the water. Each packet is good for 1 quart (or liter) of water.
Remove any discolored petals on the flower’s outer edge and any foliage or petals that fall below the waterline.