Hereof, can you divide daisy plants?
Early spring is the best time to divide and separate Shasta daisy (Leucanthemum x superbum), but it is an extremely tough perennial and can be moved or divided almost any time of year. Avoid dividing it during hot, dry periods of midsummer, however.
Thereof, do Shasta daisies spread?
Shasta daisies grow 2 to 3 feet tall. They like full sun and a well-drained soil with a pH level of 7 or higher. Their roots spread until the plant forms a bushy clump, 1 to 2 feet wide. Home gardeners plant Shasta daisies in flower beds as single plants, in small groups or in masses.
The beat time for deadheading your plants is just before the blooms die back completely. In other words, as soon as the flowers begin to fade, wither, or turn brown, it's time to deadhead. You can either cut the spent blooms with a sharp knife or use pruning shears.