Also, add iron chelates, soil sulfur and Epsom salts or magnesium sulfate. Scratch these nutrients into the perimeter area of each bush. Always water thoroughly after each feeding. Do not feed new roses until after their first blooms fade. The bulbs already in the ground hunger for nitrogen to propagate their new bulblets for next season, so feed them now.
People often complain of straggling leaves as flowers fade.
As long as leaves are green, they are producing food for the new bulblets. Tie up the sprawling foliage and plant flowers in the bare spots to brighten up the area. Bearded iris need a boost of phosphorous now to generate those beautiful spring blooms. Check your drip irrigation system before you get too busy. First, remove the filter screen and clean it.