Angelenos who adore the purple flowers of jacarandas have been disappointed this spring, as stark branches remained flowerless against an often-gloomy sky.
Angelenos who adore the flamboyant flowers of jacarandas have been disappointed this spring, as stark branches remained flowerless against an often-gloomy sky.
While many trees have yet to explode into full bloom, anxious jacaranda lovers need not worry, say plant experts. Most of the time, jacaranda trees flower between late April and mid-June, and this year it’s looking like more will be blasting “Purple Rain” like a lowrider with a trunk full of subwoofers in the coming weeks. While springtime marks the normal range, thehas recorded flowering dates as early as Jan.
Within the last week, jacaranda trees across Los Angeles County have been spotted with everything from barren branches to patchy flower tips to scant purple coloring. While some trees in Highland Park, Silver Lake and Santa Monica looked sparse, others in Hollywood, Culver City and Long Beach had more purple — a sign of hope for those on jacaranda watch.
The cold, wet winter and spring had even seasoned observers wondering where the billowing jacaranda flowers were. Lower-than-normal temperatures hadn’t deterred theEven in late May, jacaranda trees in Santa Monica, left, and Highland Park had yet to reach their full purple glory.One factor is the difference between how tropical trees and spring wildflowers cue blossoming, explains Gretchen North, biology professor at.
Heat triggers a hormone called florigen that makes the jacaranda trees flower, North explains. Florigen travels from the leaves through the tree’s circulatory system to deliver the “go” signal to buds that have been waiting in the wings since last summer. But the hormone isn’t alone in pulling the blankets from dormant buds and shouting, “Wake up!” That job also is performed by signaling proteins, florigen’s messengers so to speak.
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