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16 09, 2024

Chilean Myrtle

2024-09-18T17:54:37-07:00Categories: Blog, trees, Climate, Nora Harlow|Tags: , |

Luma apiculata, sometimes known as Chilean myrtle, is a small to mid-sized, usually multitrunk or low-branching, evergreen tree. Leaves are small, leathery, dark green, and broadly oval with a short, acutely pointed tip. Bark is smooth and grayish tan, turning cinnamon brown with age and peeling to reveal patches of white beneath. Masses of fragrant, creamy white, mid-summer flowers with showy, brushlike, pinkish white stamens are followed by edible, purplish black berries in fall. Limbed up and out of flower, trees can resemble a manzanita or a madrone, to which they are not related. Luma apiculata is

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27 08, 2024

The Chilean Puyas

2024-08-27T08:22:53-07:00Categories: Blog, Climate, Nora Harlow|Tags: , |

Puyas (Puya species) typically are described as native to the Andes Mountains of South America and for the most part this is true. Almost all of the 200-plus species of spiny-leaved, rosette-forming puyas are found in moist to dry habitats at mid- to high elevations of the South American Andes. Puyas blend well with the textures and colors of many other summer-dry plants. Two puyas are native to the wet mountains of Costa Rica and the distribution of several others extends eastward into the rainforests of Brazil. Seven puyas are native primarily to low elevations of central

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31 01, 2023

April Showers Bring May Flowers — Or Do They?

2024-06-27T19:37:45-07:00Categories: Blog, Climate, Nora Harlow|Tags: , |

If it seems that some of your trees or shrubs are leafing out or flowering early these days, it may be so. One of the most commonly observed effects of global warming is early onset of these usually reliable signs of approaching spring. Ceanothus maritimus ‘Valley Violet’ usually blooms in early spring. The species is native to coastal bluffs of San Luis Obispo County, California. We know that global warming is not just something that will happen in the future. It’s happening now, has been for decades, and the speed of change is accelerating. According to the

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15 11, 2021

What is a Drought-Tolerant Plant?

2024-06-27T19:30:29-07:00Categories: Blog, Water, Climate|Tags: , , |

Many plants are advertised or described as drought-tolerant, but what, if anything, does that tell us? Drought-tolerant where? Drought-tolerant when? Drought-tolerant if . . . what? By now, with unusually dry weather increasingly common worldwide, most gardeners likely are aware that drought itself may be defined in different ways, depending on one's perspective. Heteromeles arbutifolia (toyon) At the risk of oversimplifying, meteorological drought is lower than normal precipitation. Hydrological drought is lower than normal streamflow or groundwater levels. Agricultural drought is inadequate soil moisture for specific crops. Socioeconomic drought is insufficient water supply to meet demand. Ecological drought is insufficient

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19 05, 2021

Climate Change and Water Supply

2024-06-27T19:27:47-07:00Categories: Blog, Water, Climate, Nora Harlow|Tags: , |

Global temperatures have been rising at least since the middle of the last century, and most projections anticipate that this trend will continue. Effects of warming vary from one region of the world to another but prominently include the likelihood that precipitation will shift from snow to rain in many snow-fed watersheds. It is also likely that snow will melt faster and run off earlier, changing the timing of peak streamflow. Snow is an important, even critical, seasonal water source for many regions with large mountain ranges, including most summer-dry climates. Snowpack accumulates in the mountains in winter when demand

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27 01, 2021

The Many Faces of Summer-Dry

2024-06-27T19:26:26-07:00Categories: Blog, Climate|Tags: , |

Summer-dry climates are not dry climates. They are climates where rain falls mostly in winter. This is not a common arrangement. In most of the world, rain falls in summer or is fairly well distributed year round. Summer-dry climates are usually found on the west coasts of continents in the mid-latitudes where seasonally shifting atmospheric pressure cells block or open up to the jet stream and its storms. The photo above shows a coastal northern California climate in summer. The photo below shows a similar coastal northern California climate in winter or spring. Summer-dry climates vary considerably from one place

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29 09, 2014

A Summer-Dry Aesthetic

2024-06-27T19:23:25-07:00Categories: Blog, Climate|Tags: |

We want to change the aesthetic of what we expect to see in a garden photo in summer-dry climates.  Beautiful photos of beautiful gardens inspire gardeners to mimic what they see. Many photos in garden books and magazines are from East Coast and English style gardens, that, while are certainly lovely in those settings, are wrong in more arid and summer-dry climates.  Water is especially precious in summer-dry climates, lush images from other climates mislead gardeners to try inappropriate and unsustainable gardens. We want to inspire gardeners to choose plants that are water wise and garden styles that fit into the habitats and natural

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