Plants in bloom are moved all the time, for reasons that range from impatience to impending construction. It's usually not deadly, just more difficult to do, and it's harder for the plant to recover. There's a good chance that stems will be broken and flower heads left in disarray, but ask around and you'll find at least one person who's beaten those odds with almost any plant you can name. Water the plant well the day before you move it. Insert stakes close to the stems and gather them into a tight, but not stalk-breaking, cluster. Use soft, wide straps (such as lawn chair webbing, pantyhose, or carpet strips) to hold the stems together. You may have to tie neighboring plants out of the way so you have room to work. Dig a wide hole starting at the plant's drip line, then angle in and under the roots. Take hold of the root ball, not the stems, to slide the plant out of the hole onto a tarp. Then sling it gently to its new position and fill the planting hole with soil. Water it in well. If the weather is hot and dry, shade the plant at midday for several days. Of course, you could also resolve to improve your organizational skills and patience. When you get the inspiration to move a blooming plant, why not mark the spot in the garden where you want to move it, and wait until the time is right for transplanting it.