San Diego reveled in “Goldilocks” weather Wednesday — the Fourth of July. A sea breeze made temperatures “just right” countywide, drawing hundreds of thousands of people to parks and beaches for fireworks shows that were set to begin at nightfall. But there’s about to be abrupt change in a county that’s quickly falling into drought.
Healthy, living soil is full of oxygen, water, and life to support your plants. Building healthy soil using layers uses a process called soil sheet mulching, or “Soil Lasagna.” If you have ever cooked lasagna, this will seem familiar. Soil Lasagna boosts healthy microbes so much that they actually cook down the organic matter and start eating old grass in your landscape as food.
Once you’ve created Soil Lasagna, all you need to do is keep it moist so the microbes will stay active. How long the process takes from start to finish depends on the kind of grass you have. When you are ready to plant, you can dig a hole right into it, cutting through any paper or cardboard that might still be there, planting in the delicious and healthy soil below.
NOTE: If you need any permits, call DIG ALERT (8-1-1) two days in advance. Also, check with your local water agency for any local water use restrictions.
Once you have checked for permits and any water-use restrictions, you will need to remove your lawn. See our previous column on removing your lawn without killing the existing microbes. You will end up removing about six inches deep of grass and soil. You will need to haul this away. Consider renting a dumpster.
Dig a trench 8 to 12 inches deep (about one shovel depth), and 12 to 24 inches wide around any hard surfaces and building foundations. Also, complete contouring for rainwater absorption and retention and any other hardscaping such as moving or installing patios, paths and other features.
Use landscape flags to mark sprinkler heads so you can find and adjust them later.
Add an inch deep layer of compost on top of the graded soil. You can also use humates (a freeze-dried compost available at specialty landscaping stores) or spray with compost or worm tea. You are adding an instant food sources and additional microbes to the soil.
Water thoroughly. Roll out your painters’ paper or cardboard. Overlap at the seams about six inches and be sure all of the soil is covered. At the hardscape borders, make a burrito of rolled paper and mulch to prevent grass from resprouting.
Water the paper, and then add another layer of compost if you wish. Rake a thick, six-inch larger of mulch over the paper and compost. Now you’re seeing why this is called a Soil Lasagna.
Water again thoroughly. The mulch will absorb a lot of water before it becomes soaked through.
You can plant right through the Soil Lasagna layers. If you can wait, the soil will develop more healthy microbes for new plants, but you can plant right away if the grass has been removed.
Finally – step back and savor your hard work!
This article was inspired by the 71-page Sustainable Landscapes Program guidebook available at SustainableLandscapesSD.org. Hardcopies are available free of charge at the Water Authority’s headquarters, 4677 Overland Ave., Kearny Mesa. The Water Authority and its partners also offer other great resources for landscaping upgrades, including free WaterSmart classes at WaterSmartSD.org.
California is about to embark on one of the biggest public works projects not just in its own state history, but in any state’s history. The $17 billion WaterFix tunnel project was approved by the state Department of Water Resources in June 2017 after a decade of study, and now moves into the nitty gritty of construction planning.
Welcome to Alviso, where at any given time it can be 10 to 15 feet below sea level. This neighborhood, which used to be its own bona fide town, sits on the southernmost tip of the bay in San Jose, and it’s the next stop in our series about where our money from Measure AA is going. That’s the “Clean and Healthy Bay” tax measure that passed two years ago.
It wasn’t the best of times, it wasn’t the worst of times. With the Modesto Irrigation District’s rainfall season — July 1 to June 30 — at its end, district and farming officials indicated they’re feeling OK about the water picture. Especially since they’re still feeling the benefits of the very wet 2016-17 year. MID’s recorded rainfall in downtown Modesto is just a small part of the local water picture. As of Friday, it stood at 7.87 inches, less than two-thirds of the historical seasonal rainfall average of 12.23 inches. For comparison, 2016-17 totaled 17.93 inches, and the wettest year on record is 1982-83, with 26.01 inches.
As a roaring fire engulfed the hillside above him, Capt. Mark Bailey leaned on his shovel and guarded against embers leaping to the unburned side of the road above this small Northern California town. “We’ve got a lot of work to do,” he said on Monday. He was one of a dozen firefighters positioned along the dirt road in a remote patch of forest, which fire engines and bulldozers used to access the front lines of the blaze, a wall of flames several stories tall and moving north above a valley filled with vineyards and olive groves.
An Inland Empire water wholesaler is poised to get a boost in state funding for its effort to create a new local water supply that would provide ecological benefits in Northern California. The California Water Commission has tentatively approved nearly $207 million in Prop. 1 water bond funds for the Inland Empire Utilities Agency’s Chino Basin Conjunctive Use Environmental Water Storage/Exchange Program.
An outbreak of blue-green algae will keep Diamond Valley Lake closed until at least Friday, July 6. The algal bloom has turned the water green and is releasing cyanotoxins, which in high concentrations can be harmful to humans and animals, especially when ingested. “Cyanotoxin levels continue to improve, however in part of the lake they remain above levels we would like to see to reopen the lake to recreation,” Metropolitan Water District spokeswoman Rebecca Kimitch wrote in a message Tuesday, July 3.
Heading into the heart of summer, drought conditions have held steady in San Luis Obispo County but worsened in other parts of the state. Abnormally dry and moderate drought conditions have spread along the Northern California coast and into fire-scorched areas north of the Bay Area, according to recent U.S. Drought Monitor maps. Much of the Central Coast was saved from severe drought conditions after “Minor Miracle March” storms swept through the area during the spring.
After a brief reprieve, California once again is entering a drought. Having just climbed out of the state’s worst drought in centuries, this news is a sober reminder that reform is urgently needed to avoid endless water wars. Thanks to population growth and climate change, the problem is not going away any time soon.
The Water News Network is San Diego County’s source for water news and information.
