The Q&A Archives: Lillacs will not bloom in hot desert

Question: We have lilacs that were planted near a large tree for some shade since our summer afternoon temps get into the 110-120 degrees, and the intense sun would kill them. They get mid day sun for about 3-4 hours. the plants are growing (for about 3 -4 years, but do not flower. What should we do?

Answer: Lilacs grow best when they receive at least 6 hours of sunshine. You're right, some filtered shade from the hot afternoon sunshine will keep them from becoming stressed, but they still need more direct sunshine than they are now getting. Without enough sun, they will bloom sparsely, or not at all. Wish I had better news for you!

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