Q.I Have A Crepe Myrtle, Zone 4, NY. Moved Several Time..deer & Disease.It’s In A Tire Against A Post Trimming When & How Much, It
‘s beautiful!When & how much do I trim? I am an senior citizen, avid gardener! Thankyou!

Certified GKH Gardening Expert
Crape myrtles aren't usually hardy in zone 4, so you must have a tough one!
These articles should help:
https://www.gardeningknowhow.com/ornamental/trees/crepe-myrtle/pruning-crepe-myrtle-trees.htm
https://pender.ces.ncsu.edu/2022/02/how-do-i-prune-crape-myrtle/
https://www.gardeningknowhow.com/ornamental/trees/crepe-myrtle/crape-myrtle-fertilizer-needs.htm
https://www.gardeningknowhow.com/ornamental/trees/crepe-myrtle/crepe-myrtle-care.htm
https://www.gardeningknowhow.com/ornamental/trees/crepe-myrtle/transplanting-crepe-myrtle-trees.htm
https://www.gardeningknowhow.com/ornamental/trees/crepe-myrtle/crepe-myrtle-pest-control.htm