I put in a weeping redbud 2.5 years ago. It has grown very strongly, and is now about 7′ tall and 3.5′ across. I want to move it next spring. Is it now too established to made that reasible?
Thank you very much for reaching out, and for your question.
The Weeping Red Bud is a beautiful tree. Given that your tree was planted only 2 1/2 years ago, moving your tree is feasible with proper practices and care. Redbuds develop a taproot, but generally have a shallow root system.
You mentioned that you want to move it in the Spring, which is when it should be moved. You can move the tree after the ground thaws. You must thoroughly water the redbud tree three days prior to transplanting. You may want to mark the tree on the trunk so that you can orient it in the same direction in its new location, if desired.
Dig a trench, 24 inches deep, completely around the tree. Use the spade to sever all roots except the main root of the tree. Once all the secondary roots have been severed, dig down under the major root of the tree and working your way around the root ball, loosen the root from the soil. A good rule of thumb is to prepare a hole that is at least as wide and deep as the root ball.
Based on the dimensions mentioned in your note, it seems that your tree has almost reached its maximum size. You may find the staking information in the website below useful.
References
Pruning and Staking a Weeping Redbud
Because of the height of your tree and its canopy, if you find it difficult to move the tree, an option would be to consult a professional arborist who could make the move for you.
Landscape Ontario is a good place to find an arborist.