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Hello, I recently ordered 3 small juniper pre-bonsai trees. They were shipping from Florida to me in Oregon. The upcoming forecast this week has highs of 50F and lows of 25F. I am wondering how I introduce these trees to the colder temperatures. I am worried the trees are not dormant and putting them outside could hurt them. I am also scared to keep them inside due to lack of sunlight. These are my first outdoor bonsai, any wisdom or thoughts are greatly appreciated, thanks in advance!

I do think they will be ok.

However for extra safety I put newly arived trees in my 5 degree overwintering room. Not everyone have that luxury. If you have a coldframe, greenhouse or a shed where you can protect them until the risk of frost is over that is another possibility.

Thank you for your reply!

The closest thing I have to a cold frame or shed is my unheated garage though it does not have any windows. I currently have them indoors in a south facing window. I thought of keeping them indoors for the next 4 days until it warms up to the 40's F. And then maybe bring them in the garage overnight when it goes below freezing. Please let me know if this is a bad idea.

I also don't fully understand the risk of frost. Does this just mean when the tree is in a climate below freezing?

Indoor in livingroom conditions is the worst idea. Get it out from there.

Frost is not a problem for junipers at all if they have experienced a natural authum outdoors and got into dormancy. My junipers was solid frozen for 6 weeks straight with temperature always below -10 two years ago without any issues. Record low that year was -20. Just to give an example how theese trees are.

Now, I am not fully knowledgeable about the different US climates even if we have many members that expect everyone to know this . TBH I understand better the different conditions in Slovakia and Slovenia. The possible issue with moving trees from warmer arreas to colder in late winter and early spring is that the trees are not dormant atm, then it is sensitive and dry cold can burn the growing tips. It is not any risk of losing the tree, just that it looks bad for a while and slows down development.

Our local garden centers always fill up their stock in spring with trees produced in Holland, a warmer area than here that gets into spring earlier than us. If we get late frost after the arrival they all look bad and have to be discounted.

I would put the trees outdoors and put them into the garage temporarily just when there are risk for frost.

Okay I will try that. Thank you so much for the wisdom! I feel much more relieved now.