My region of Southern California is often dry. Total days of rain are usually few, less than 30, I’d say. Additionally, inches of rain average between 10 and 15. But, in the last several years, California, and here specifically, has been in the grip of severe drought. I estimate that we got something like 6 inches of rain all year last year (by which, I mean, the “rainfall year” which typically is said to begin in October. This month alone we have doubled that. In January, my weather station (which is probably fairly acurate but not necessarily precise) has received nearly 12 inches, and will most likely exceed that today.
I’ve become much more aware of the weather and rainfall since starting my garden/yard. The majority of my plants are drought tolerant. They still need water and in times of drought, they need supplementary irrigation. But, I think I may not be watering much this Spring. In fact, more than half of my plants have been in the yard over a year. My understanding is that after a year, California native plants are “established” and need significantly less water. For some, that means none. There’s a great site, Las Pilitas, that is primarily a nursery but is also a treasure trove of information about California native plants. On that site, they specifically state that most truly drought tolerant California native plants hate water after the first season or two. For example, I have a few different Ceonothus species. These are also known as California Lilacs.
Ceonothus plants, as far as I can tell, hate water, especially when it’s warm. They will accept water when it’s cold, like right now, but that’s it. What I have read is that there are microorganisms in the soil that live when it is either cool and moist or warm and dry. Warm and moist soil kill these microorganisms. They are what provide nutrients to the roots of many native plants! This is why, by the way, you also should not amend California soils when planting natives, and do not add fertilizer. Apparently these mycorrhizae feed the plants are vital for their growth and survival. You might say that if you are a gardener of California natives, you aren’t growing the plants so much as these mycorrhizae!
So, I have killed at least two Ceonothus plants by watering them too much. I’m doing better with the ones I have right now. I have four that have been in my garden over a year now. Two others were growing and looking good but they were eaten by gophers. Speaking of, I just read as I was getting links for this post, that gophers tend not to eat plants that aren’t being watered!!! Oh yeah! So, maybe this year will be better if I’m not watering so much, then maybe the gophers won’t eat so many.
That doesn’t mean my hose will be idle. About once per week, I will go out and “wash” the dust off the plants by spraying the leaves. This won’t really water them but it will keep them from getting covered in dust, something else they hate. That will be nice to just go spray my plants down and not worry about watering deeply. Let’s be clear, though, this only applies to established plants. For the plants that are still young and in the first season, I will definitely be watering those plants (and keeping an eye out for gophers!).
The rain coming down right now as I write this means I will probably not water any of these established plants at all this Spring. We’re having a good year for rain, even by California’s standards. It looks like we will at least meet the “normal” averages for rain and that should make my garden very happy.