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Hello,
I got a Nana juniper this November. I really want to repot it now (January). What are the dangers of repotting it now? Can I cut back the roots a bit now and will that hurt the tree? Thanks for the help

I do not recomend repotting a newly purshased tree. Better to wait until it has grown healthy for at least a full summe before repotting.

With that beeing said: I start to repot my trees around now. But only if the soil is completely thawn. Trying to repot a fully or partly frozen root ball is very hard on the roots. After repotting I protect them from frost until it is spring.

The question is why do you want to repot? There has to be a reason and not because you have just got it. Does it drain well? If so no need Is it potbound? If no then no need, Is it at a stage to go into a good pot? If no then no reason to repot. There is no problem re potting this early in the year as long as you are able to protect from frost, if you can't then wait.

I would say there might be a third reason to repot....To improve nebari, a part of the design. It has nothing to do with basic horticulture, but someting we do sometimes in bonsai.

Althou, I do not think that is the reason in this very situation.

Yes, of course, I left that off, and change of style also, but as you said probably not with this plant.?

Maybe this helps?


In short: You normally have a reason to repot, more than just "I want to". When you repot, always work on the roots with the aim to reduce overly heavy or long roots, and improve the rootspread (nebari).

Depending on your climate now is a bad or a worse time to repot junipers. Best time to repot is when they are just starting to grow. Typically, this is shortly after most deciduous trees start breaking buds. At that point the tree can respond directly to the work done. If you repot in mid-winter (right now in temperate northern hemisphere) the tree can only sit there with cut roots and nothing will change for weeks to months. There is no benefit for doing it now. (Except.. Making sure you get all trees done, in case you have many). There are however risks involved with doing it now. If you know how to handle things, it can however be done.