Embrace Screen-Free Week and explore the Irvine Ranch Natural Landmarks.
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With all the technology people have right at their fingertips, it can be easy at times to forget what adventures await outdoors. National Screen-Free Week, May 2-8, is a program by the non-profit Campaign for a Commercial-Free Childhood encouraging people to put their smartphones away and embrace life beyond digital entertainment. Multiple locations within the Irvine Ranch Natural Landmarks are close to Orange County residents, so it’s the perfect place to go to grab a breath of fresh air and connect with the outdoors.

Public support is needed to help large-scale restoration project re-introducing native grasses to the Landmarks.

The spring green you see covering the hills hides a dirty secret: A lot of that green comes from non-native grass that will die in the summer and become potential fuel for wildfire. The ranching history of the Irvine Ranch Natural Landmarks includes plants that were brought here to support cattle grazing in the hills. Now that land managers are restoring local habitat for the benefit of wildlife, attention is being turned to the importance of re-introducing native grasses.

From the dark leaves of coastal scrub oak and black sage, to the bright hues of coyote brush and coastal prickly pear cactus, St. Patrick’s Day green is a common color around the Irvine Ranch Natural Landmarks this time of year. Recent rains and the winter season – when native plants come out of dormancy – have made the green shades even more prominent.
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There are a variety of activities out on the Landmarks the week of St. Patrick’s Day to spot green in full force, whether during a fast-paced hike, an interactive outdoor adventure or volunteer opportunities giving back.

The first official day of spring isn’t until March 20, but many flowers on the Irvine Ranch Natural Landmarks are already beginning to bloom. Chocolate lilies have been spotted on the slopes of West Loma Ridge in Limestone Canyon Nature Preserve, Weir Canyon Nature Preserve is rich with fields of bright yellow fiddlenecks, and wild hyacinth and sticky monkey flower are plentiful along many trails in Bommer Canyon.

But wildflowers need more than just warm weather and rainfall to thrive long-term. Invasive and non-native plants can steal light and nutrients from native flora, making it harder for native species to grow. In 2012, the small-flowered morning glory – a rare, native flower that was in decline within the Landmarks – was discovered sprouting from dormant seeds in the West Loma Ridge watershed habitat restoration area. This uncommon flower was able to make a comeback in part due to the removal of invasive species; in the absence of weeds, its seeds remaining in the soil were able to return to an environment free of competition from invasive plants.

Wildflowers are starting to appear in local canyons, but not all of these flowers are happy harbingers of spring. Some blooms are signs of invasive weeds threatening native plants and wildlife of the Irvine Ranch Natural Landmarks. And while spring is the season to spot native wildflowers, it’s also a critical time to remove one of the most dangerous and invasive threats to our protected wild lands: Sahara mustard. You can help by volunteering to remove this invasive weed and help restore wildlife habitat.

Sahara mustard (Brassica tournefortii) is a highly aggressive invasive weed that is more of an immediate threat to native flora and fauna than other, more-prevalent mustard such as black mustard (Brassica nigra). Despite Sahara mustard’s tiny, pale yellow flowers that look pretty for a short while, its ability to quickly and easily invade and replace healthy habitat makes it a prominent threat to the Landmarks. The weed can quickly spread its seed, grow rapidly, making it a top priority for removal before it establishes too much of a hold within the Landmarks. When invasive weeds drive out native plants, they also drive out the wildlife that depends on native plants for food and shelter. Public support is vital to stopping the weed’s spread and ensuring the continued protection of one of Orange County’s most diverse open spaces.