Why Lilacs Don't Bloom
We all wait with eager anticipation for about 50 weeks for our Lilacs to
bloom. Then, when they fail to bloom, we are devastated. Why, why, why?
You are in very good company. This question is by far, the most frequent
Lilac question we are asked each spring.
Here are the most common reasons why Lilacs won't bloom:
-
The buds were inadvertently pruned off last year. The new buds form shortly
after the flowers die back.
See Pruning Lilacs.
-
The bush is immature. Most varieties need three, and sometimes four years
to grow and develop, before they produce their first blooms.
-
Soil imbalance. This is caused by a pH imbalance, too much or too little
of certain chemicals. We recommend a soil test through your local
Cooperative Extension
Service.
-
Improper mix of fertilizers applied. Flowering of both plants and vegetables
is encouraged with higher Phosphorus. Sometimes, people use high nitrogen,
which will help produce green leaves, while hindering blooming.
-
Insufficient amount of sunlight. Without enough sunlight, the plant often
will not bloom. Lilac bushes prefer full sun.
-
Transplant shock. If you transplanted your Lilac bush since the last blooming
period, they sometimes will miss a year, as they need time to recover.
-
Dry summer weather can keep buds from properly forming on the bush. If you
are experiencing a summer drought, water the bush once a week.
If your lilacs won't bloom, try to determine which of the problems above
is the most likely culprit. It may be a combination of a couple of these
reasons. Then, correct the problem. Next, year, you should be rewarded!
More Information:
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