Look up their hardiness ranges. You lose 2 zones of hardiness in above ground pots. In your zone, the plant would have to be hardy to zone 4 to be safe.

A solution is to bury the pots in vacant veggie beds, or bury them in piles of mulch or woodchips. I buried a couple hundred potted plants in my veggie beds, woodchip piles and compost piles last year, and most survived.

I'm in Westchester County. I have LOTS of pots... and LOTS of perennials.The Dahlias, Callas & Cannas over winter in my mother's basement. The Hibiscus comes in. Everything else is on its own outside, in their pots.
There are day lilies, coreopsis, columbine, violas, penstemon, bee balm, hellenium, chives, mint, hops, honeysuckle, blueberry, tinkerbell (dwarf) lilac, strawberries, pineapple mint, wild rose, beacon silver, tansy, Heucherella and two trees - choke berry & purple leaf plum.

Every week I take a picture of the yard room my bedroom window.
This is the last shot from last year. All the pots in front of the row along the fence on the right are perennials - so are the ones in the back.
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Here is a link that might be useful: garden pics

Your garden pics are stunning. I love the brick courtyard look. Do you water all that by hand?

Thanks, watergal.
Yes - I water by hand. It takes me about an hour to give everything a thorough watering.
It's a nice way to unwind.
I can clean up, deadhead & weed as I go.

I have one hose in the front by the back door & I run one up along the pots on the right to the back of the yard.
This way I can water the back end without having to haul the hose all over the yard.

Love your garden and website. Thanks for sharing your inspirations.

I'm in the market for a versatile, low maintenance, easy to use QUALITY digital camera that is not expensive. Does anyone care to recommend or comment on the right camera? Thanks.

Hey Out of spite-
How do you prepare all those pots for winter?

The ones with the annuals - the plants get tossed.
The ones with the perennials - I cut back the plants.
I have a marker in the perennial pots so I'll know what's a perennial and what's just plain dirt.
I bought the cheapest mini blind I could find and cut up the slats. I stuck a piece in each perennial pot.
The following Spring, anything coming up in a non-marked pot - is a weed... except for the malva (an annual) which re-seeds. Luckily, its leaves are easily ID'd. I gather up all the volunteers & put them in one pot.

The pots are all placed in the back & right side of the yard to make room for the bird feeders.

The only perennials that get different treatment are the callas & dahlias (dug up, sprinkled with bulb dust & stored in a paper bag in my mother's basement). The cannas & tuberose also over-winter in the basement - in their pots. (which are smaller & easily carried next door - where Mom lives)

That's it. Come Spring - I just hope for the best.
Over the past 10 years, I've lost maybe 2 or 3 plants. Those were new ones that just didn't make it for one reason or another.
Everything else are season regulars & pop up every Spring.

The day lilies for example were left by the previous homeowners. About 3 or 4 years after I moved in, I divided them into quarters. I gave one to Mom & kept 3 pots.
This spring I gave one pot to my uncle & divided the other 2 in half. Now I have 4 pots. They are doing fine - blooming & have LOTS of buds.
Next Spring - I'll divide the penstemon & Bee Balm.
While a few of my perennials are Spring bloomers - I prefer to have those that bloom all summer - like the black eyed susan, bee balm, gay feather & phlox - among others.

As OoS mentioned, you should be fine. From your list, I have a regular bleeding heart (Dicentra spectabilis) and don't do anything to protect it, although I may pull it back from the rail in summer to get it out of the sun and into a cooler spot so I can maintain its foliage a bit longer. D. eximia (the fringed one) is good to Zone 3 and D. spectabilis is good to Zone 2. Pretty hardy!

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Outofspite,
your garden is beautiful. Do you mulch your plants where you have perennial plants?

kandhi -

I used to mulch but I haven't done it the past 3 years or so.
I generally surround the perennial pots with the annual ones. (Yeah - like they're gonna protect them-LOL!)
I don't' really do anything special.