Climate & Microclimates
Like soil and water, climate is a key factor in assessing your site, choosing plants, and ultimately growing a successful garden. In addition to understanding our Mediterranean climate, it pays to evaluate your climate zone and microclimates. Also, consider climate change as you make plant choices and manage your garden.
Marin County sits in one of the world’s five Mediterranean climate zones, which comprise just 2% of the Earth’s land but 20% of its plant species.
• We share this climate with countries bordering the Mediterranean Basin as well as parts of coastal South Africa, southern Australia, Chile, and other areas of California.
• In the winter, Mediterranean climates are typically cool and wet with infrequent freezes.
• In the long dry season of summer and fall, our weather is warm or hot, with little rain.
• In general, plants that require a lot of water in summer are out of sync with our climate.
• Plants native to the world’s other Mediterranean climate zones also thrive in Marin. That is why our nurseries carry an expanding selection of plants that originated in other Mediterranean climates.
• Many plants native to Mediterranean climate areas have developed fascinating coping mechanisms to survive long stretches without water. Some have small, waxy, leathery leaves or needles. With less surface area these leaves lose less water to evaporation. Gray and silver foliage has tiny hairs that reflect sun, cool leaf surfaces, deflect wind, and slow evaporation. Fleshy succulent leaves collect and store water and then harden over to seal in the moisture.