How late can I plant in zone 5?

[lemonthyme7]

I am getting some great deals at my local Home Depot on plants - 75% off! I got gallon containers of euonymus(wintercreeper) "Emerald Gaiety" today for 83 cents each. I feel like it might be to late to set them out now though. I can get boxwood gallons for 99 cents and Clumping River Birch that are about 5 feet tall for $3.29 each. There are other deals also. I have some landscaping I have been wanting to do but don't want to get these deals just to have them die because I planted to late. I have a 14 x 24 high tunnel greenhouse (plastic covering) that I can plant them into for the winter if that would be better. I use the greenhouse for winter salad greens but can ferret out a corner if I need to. I have a mock orange my sister gave me and I planted it directly into the greenhouse rather then risk losing it and will set it to its permanent location outside in the Spring.
So what do you think? I hate to pass up nice plants and these are in nice shape - they are not ratty looking or anything. I'm a sucker for a good deal and they would all certainly get used.

[po boy]

How late can I plant in zone 5?

Anytime. before the ground is too hard too dig.

[olivehill]

For perennials that are hardy in your zone could you just put them in a protected spot in their pots and winter them over before planting? I'm thinking stacking some straw bales and tucking them in between in a shed?

Might have to check out Lowes... I could use some boxwoods.

[Danaus29]

Don't try to overwinter them in pots unless the pots are "planted". I've lost a lot of plants by not getting them in the ground before real winter hits. You can plant until the ground freezes, just be sure to water well when planting.

[lemonthyme7]

Thanks for the replies. I ended up getting:

2 Harvest Gold flowering crabapples ($5 each - about 4 ft tall)
1 Yoshino flowering cherry ($5 - about 4 ft.)
1 very large Kwanzan flowering cherry ($35 - 8 ft tall - 3 inch trunk)
1 Fairview Flame maple ($7.50 - 5 1/2 ft tall)

I will be setting them all out this weekend into their permanent locations and hope for the best. Even if I lost a couple, for the price I paid I think I got a pretty good deal!

[NickieL]

Mulch them good after you water them in so frost doesn't heave the plants out of the ground