Lilac Tree Is Healthy but Has Never Bloomed

Question

My Lilac tree is very healthy, has plenty of sun, lots of green growth every year, is over 20 years old but has never bloomed. WHY? What can I do?

Answer 1

This article should help: https://www.gardeningknowhow.com/ornamental/shrubs/lilac/lilac-bush-not-blooming.htm