To help improve your iris blooms, start by pruning your irises to help them rebloom in the same year. Then, make sure your fertilizer offers the right nutrients. Lastly, watch out for weeds. For a better-looking garden, I mix and match iris species to increase the length of time the garden blooms. The Bearded iris blooms early in the year while the Siberian iris blooms later. Mixing these species will give your garden a mix of beautiful blooms throughout the year