Do wounds on lower legs heal more slowly?

In general, no: However, there are reasons that wounds will heal more slowly and these often do involve the lower extremities. Health conditions such as diabetes compromise small blood vessels, as does smoking and these typically progress with age. If you are asking this question the big issue is how slow is your wound healing ? If you are concerned it should be looked at.

That depends.: If there is any problem with arterial or venous circulation wounds may heal slower. That is why it is important to understand the blood flow and confounding factors that may affect wound healing.