Gardens Learn How to create and maintain gardens.

Dec 14, Deadhead the Japanese pieris during its bloom time, generally February through April, by pruning off each blossom cluster as it fades. Use fingers or shears to remove the cluster at the stem.

Apr 21, Hard Pruning and Remedial Pruning of Pieris Pieris can be cut back to shape, or even hard pruned to rejuvenate the entire shrub. This is best carried out in early to mid-spring, but I have been successful cutting them back during late winter if they are growing too large for their space. Pruning Pieris Plants. The primary pruning that needs to be done to Pieris plants is to regularly pick-off the old spent flowers.

If your Pieris should need to be shaped or reduced in size, it should be pruned immediately after it has finished flowering. Propagating Andromeda Plants and Growing them from Seed. Jun 03, Get the Best Mortgage Rate for You Add a Slow-Release Fertilizer. Fertilize lily of the valley withslow-release, granular fertilizer every three Prune Flower Stalks.

Cut off lily of the valley's flower stalks with a pair of pruning shears once the individual blooms Watch for.