I would wait until the leaves of our Shasta Daisies start to yellow. The flowers may have faded but the foliage is helping to make the roots stronger for next year's blooms. Now here is a time saver - even if you don't dead head your daisies will bloom well next year. You can just wait until October and use the weed whacker or string trimmer to mow all the foliage and old flowers down to within six inches of the ground. You can even leave the mess as a mulch over the winter - if you can stand the mess. Fall is also a good time to dig, divide or share your plants with other gardeners. Nothing is as sweet as a daisy on a summer day in the garden. Keep growing, Marianne Binetti