This year lilacs were hit with a freeze at just the wrong moment! That, plus drought conditions in the ground (very little moisture over the winter and no moisture in the soil by early spring), caused the lilac buds to emerge tiny. Now a few of these miniature flowers are blooming. This is the latest lilac bloom I've seen in eighteen years. Granted, growing conditions in the Rocky Mountains are variable from year to year and season to season. But in addition to our usual weather anomalies, the El Nino conditions this winter, La Nina this spring, and probable climate change, make for a very unusual flower season.