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Archive for the ‘Drip irrigation’ Category


Nan’s Garden Tip #101: Mulching Vegetable Gardens

Thursday, July 22nd, 2010

Want to make your vegetable garden more waterwise?  Here are two suggestions:

  • Switch to drip irrigation

Most vegetables dislike having wet leaves. In fact, wet leaves often become mildewed leaves.  Drip irrigation is far more efficient than overhead spray and it keeps leaves dry and mildew free.

  • Mulch with a three-inch thick layer of home-made compost.  If  you don’t have enough compost, use seedless straw.
  • Straw is the perfect vegetable mulch. It is lightweight, but keeps weeds down and soil moist

    Straw is the perfect vegetable mulch. It is lightweight, keeps weeds down and soil moist

Wood based mulches, stone and gravel mulches are fine for ornamental plants, but in the vegetable garden, home made compost and seedless straw are better choices.  Both insulate the soil from water loss and both are light enough for seeds to push through.

Zinnia seedlings poke up through the straw

Zinnia seedlings poke up through the straw

If you opt for straw, be sure you don‘t get hay or alfalfa or anything  that has lots of seeds.  Why?  Years ago, I mulched with straw and grew a lovely bed of wheat…. instead of tomatoes!

If you can get old straw, that’s even better.  As straw ages, the  fibers start breaking down and residual seeds begin to rot.   That’s a good thing.

And, old straw can’t be sold for animal bedding, so feed stores (the best places to get straw) often regard them as waste.  In fact, they may even give you the straw for free!

If you don’t have room to store an entire bale of straw, ask for a “flake.”  A flakes is simply a section of a bale.

This bale of straw will last me two or three seasons

This bale of straw will last me two or three seasons


On the radio this morning

Monday, July 12th, 2010

Had a great time doing my quarterly gardening radio gig on KPBS FM 89.5, Public Radio in San Diego. Host Maureen Cavanaugh is a blast to talk with, and the callers had great questions about tomatoes, how to water, the cool weather, and lots more.

Click here to listen!


My Greener, Waterwise World

Wednesday, June 9th, 2010

I had a delightful morning as I welcomed the crew from Growing a Greener World into my garden.  Growing a Greener World is the new PBS television gardening series hosted by Joe Lamp’l, one of my co-authors on my latest book, Waterwise Plants for the Southwest.

My reaction to working with Joe Lamp'l and his crew on Growing a Greener World

Theresa Loe, associate producer for Joe’s show, contacted me about being the guest expert for an episode on saving water in the garden.  Since that’s exactly what I spend most of my life talking,  writing about, teaching people to do, and doing myself, I was delighted to participate.

Me and Joe Lamp'l in my garden shooting an episode of Growing a Greener World

Me and Joe Lamp'l in my garden shooting an episode of Growing a Greener World

Joe and I discussed low water gardening, why it is important, and why I started doing it.  Being a California native, I have known forever that water is a precious resource.  One of my major gardening goals is to create maximum beauty with as little water as possible.

We toured my garden, looking at my new, low-water meadow, now six months old.

Part way through planting my new meadow

Part way through planting my new meadow

We talked about how to select plants that are waterwise, whether you live in Maine or Miami.  We most talked about efficient irrigation technologies, and ways to grow vegetables with as little water as possible.

Joe and his crew were a delight to work with.  The show will air on or around September 11th this year.  I can’t wait to see it!

Carl (or maybe Kilroy?) sets up a shot

Carl (or maybe Kilroy?) sets up a shot

Leo decides between iPhone and video camera

Leo decides between iPhone and video camera


The Water is ON

Tuesday, March 24th, 2009

I just turned the water on.

Is that a big deal?

I’m talking about irrigation water. And YES its a big deal because it has been off since  October. Yes OCTOBER.

How did I manage to avoid watering for nearly six months? Easy! I grow low water plants.

When I started working on this garden in 1992, all the other gardeners I knew labored to create the perfect, flower-filled English garden.  I was planting my back corner with natives. While they toiled over roses, I planted aloes and agaves. When everyone wanted a lush lawn, I went for ornamental grasses set amidst un-thirsty flowering shrubs from Australia and South Africa.

My goal was, and still is, to see how much beauty I can create using as little water as possible.

So how did I do? Judge for yourself. Most of the photos decorating the pages of this website are photos from my garden.  Previous blog entries have photos of my garden as well.

A low water, high flower combination: golden orange South African annual Ursinia anthemoides  with 'Dusky Rose' California native poppy

A low water, high flower combination: golden orange South African annual Ursinia anthemoides with 'Dusky Rose' California native poppy

I can’t take credit for it all, of course. I am fortunate to have good advice from designer Linda Chisari who helped with the original design for my backyard (in 1992) and became a valued friend in the process.  Nearly a decade later, designer Scott Spencer, another of my favorite people, got me going in the front yard. I have learned and continue to learn a tremendous amount from both of them.

And then there are the dozens of nursery folk who endure my never-ending questions as I search and research plants to write about, talk about, and of course, try out in my garden.

Not that my garden is entirely low water. I couldn’t live without a vegetable garden (I have a hard time understanding how anyone can live without a vegetable garden).

Late summer harvest in the vegetable garden

Late summer harvest in the vegetable garden

Vegetables take a considerable amount of water, but I use drip irrigation to target the water to each plant and drip it directly into the ground above the roots, so it is used very efficiently.
Fruit trees take more water than natives, but probably not as much as you’d expect. Deciduous fruit trees – those that are bare in winter – need water only when they are actively growing in spring and summer.

Evergreen fruit trees need water year-round except when it is raining. Still, their well-established roots are less thirsty than, say, an equal area of lawn.

And besides, if I am going to spend water, I want to spend it on plants that give me something back – like food!