Abby Wines, acting deputy superintendent at Death Valley National Park, said that on average, Death Valley typically receives only about 2 inches of rainfall each year.
“From November through early January, we had about two and a half inches of rain, so we had more than our annual average in just two and a half months,” she said.
Wines said that some wildflowers usually emerge in the park every spring, but superblooms (though that’s not an official botanical term) only occur after especially wet fall and winter seasons.
The most extensive blooms — ones that can be seen at low elevations almost everywhere in the park — also need the “right” type of rain, according to Blacker.
“We need multiple days of drizzly, foggy, gentle rain that soaks in, but not the heavy monsoon rains that wash out our highways and destroy our roads,” he said. “And then we need mild temperatures going into spring, because once the flowers come up, their big enemy is wind and heat.”
The types of wildflowers that bloom in the desert are known as ephemerals. Unlike cacti, which store water to survive hot and arid environments, these flowers can exist for long periods of time in seed form in the soil.
“You can think of it like drought evasion,” said Erik Rakestraw, a curator of botany at the Arizona-Sonora Desert Museum in Tucson. “In their seed form, it’s like they’re not even existing. They’re just laying in the soil.”
In the proper conditions, the seeds will germinate. Then, after the flowers are pollinated, they’ll turn back to seeds and the cycle will begin again.
“If there isn’t a good rain event next year, or even the year after that, or several years in a row, those seeds have evolved to just sit and wait it out,” Rakestraw said.
For anyone hoping to catch this year’s superbloom, time is of the essence.
Wines said the wildflowers at lower elevations are only expected to persist until mid- to late March. At higher elevations, blooms are forecast to emerge from around April to June. But both of those timing estimates depend heavily on weather, she added.