Transplanting a silver birch

(Question)

Moving a silver birch that is about 10 feet tall when is the best time how deep would the roots be probably?

(Answer)

Thank you for contacting the Toronto Master Gardeners with your question.

Birches in general have shallow root systems, but varies according to soil conditions. A tap root can form  in dry or sandy soils. Shallow roots develop on wet sites and on spoil heaps, mined land or bare land.

Please refer to the following link for your detailed response;

https://www.torontomastergardeners.ca/askagardener/transplanting-birch-tree/