We need to know what zone you are in and where you live in order to know how much time you have left in the growing season. New England zones range from 4 to 6, probably a 30 degree and 4-5 week difference in length of growing season.

Not to be too technical, but spireas are woody plants, specifically shrubs with a number of stems that grow directly from the soil. They are bloom every year, like herbaceous perennials, but they really are different. Fortunately they are very tough and more likely to live despite neglect or hardship than 'perennials'

However they can be killed. I;ve done it.

. There's no reason to wait till November to water it or plant it. Think strategically. The order of the following "steps" isn't mandatory, but I'll spell it out anyway. I 'm sure someone will have corrections or additons to make, but at least you can get started getting water.

First, I hope you are watering the spirea now. Bring water from the sink or shower. Give it a soaking until the water comes out of the drainage holes. Water weekly until planting.

Don't keep it in full sun. If you have unseasonably hot weather, water it.

Next, decide where to put it and dig the hole. If you don't know the newest research on soil and plant preparation here's a summary: do not amend the soil, dig a hole 2 x wide and about as deep as the plant's rootball. Repeat: no fertilizer, no compost, no grow sticks.

.Then I 'd find a a 'dry wall' bucket or even a big kitchen trash can and put it near the planting hole. Then I'd start collecting 'gray' (waste) water from washing dishes and produce as well as from showers or baths. Carry it by the bucket or dishpan to the larger container. When you have at least 5 gallons, prepare the root ball in preparation for planting. Loosen it; if it is circling and root bound, soak it in the bucket of water and untangle the roots a bit. Plop the plant in properly prepared hole and give it a good 5 gallon soak. Use the same water, it's good.

I'm not suggesting you break the ban or contribute to the decreasing water table, but you might think of other ways to get water. Certainly put out containers- large pots or even wheelbarrows for instance- in case there's rain.

Plant it properly: Loosen the root ball. Plant it at the correct depth. Make a "well" or circular dam about 1 .5 feet out, around the shrub. Pour the water steadily....and the retaining edge will hold the water and direct it to the roots.

Mulch....no less than 2 inches away from the stems....about 2-3 inches thick, 1 foot wide.

Now I remember you've got several. So collect more water, dig more holes.

Maybe other readers will have a better plan for multiple plants that will be more efficient, but I think the basics are still accurate.

Best of luck.....

I've had good luck transplanting and planting things around Halloween in Zone 6.

If you are going to keep it in a pot that long, make sure it isn't root bound...maybe up-pot it.

I find it easier to keep a plant alive in the ground than a pot, so if it were mine, I'd go ahead and plant. As Marie said, use recycled water (waiting for the shower to warm is a great source of a couple of gallons, and the retaining edge will help keep it near the plant. The weather is cooling, days are less than 12 hours and getting shorter, and we have gotten some rain recently. I'd plant now, which is really the idea time to plant - soil warm, air cooler but still humid, lots of time to grow roots before the ground freezes. Be sure to mulch well and keep an eye on water until hard freeze by sticking your finger a couple inches deep into the soil under the plant and watering when almost dry.