bb37c2328fb7d8ad9945a487b53ad7e4

Lawns all over the area had a similar reaction to the heat. You probably noticed it too. Grass areas, maybe even on your own; showed dry, wilted, discolored or parched patches. Last weekend it seemed like every second lawn, at homes, in homeowners associations or on city landscapes showed the same wilted patches. It was hard to miss.

Like clockwork, at the first heat spell every year we see these patchy wilted lawns. It’s never the whole lawn that wilts, usually just small, irregular portions. 

In the landscaping trade these dry lawn sections are called “hot spots”. But hot spots are habitually misunderstood and usually mismanaged. More often than not, a homeowner or paid gardener’s attempt to eliminate a hot spot is a very wasteful activity.

A “hot spot” is simply an area of your landscape that isn’t getting enough water, or at least isn’t getting as much water as the area around it. It is most obvious in lawn areas, where it is easier to notice than among shrubbery or mixed plantings.

lawnhotspot.jpg

Here’s how a how spot happens. An irrigation system turns on and waters for a while. With a casual glance everything looks fine – nice and wet. But in reality, some portions of the lawn are receiving far less water than other areas. If, after an irrigation, you took your shoes off and poked a long screwdriver into the lawn in several places you would find out just how irregular this “nice and wet” look really is.

During cool times of the year these irrigation irregularities are pretty well masked. But during the first heat spell of spring, the little patches of lawn that don’t get enough water stand out. A day or two of really hot weather and these little dry patches are wilting and beginning to brown. These are lawn “hot spots”.

Now that you know what these patches of lawn are, what do you do about them?

What most people, or their gardeners do about a “hot spot” is to crank up the irrigation. The usual tactic to eliminate that little patch of dry, wilting grass is to apply more water. This means either watering longer or watering more often, or both. Bad idea. Cranking up the irrigation system is a mistake, a wasteful mistake that we can no longer make in a time of water conservation.

The mistake in setting the irrigation system to higher and higher output, until the hot spots finally go away, is that huge amounts of water is being wasted on the remainder of the lawn. It’s a failed strategy; a bit like turning the lights on in every room of a two story house when you are looking for a coat in a downstairs closet. Why apply two or even three times more water to ninety percent of the lawn because ten percent of it needs it?

Lawn hot spots are almost always the result of irregular sprinkler system coverage, but are sometimes caused by a small patch of unusually hard soil that takes up water more slowly or by a small rise or slope that causes the water to run off. If you water the whole lawn every time you really only need to water a hot spot, you'll be over watering every part of the lawn that isn’t a hot spot.

Better yet, to permanently eliminate a hot spot, start out by turning the irrigation system on and checking for a clogged head or one that needs a simple adjustment. If that doesn’t do it you may need to replace the head near the hot spot with one that covers the area more thoroughly. If still not resolved, you’ll probably need to add another head to the irrigation system, quenching the hot spot.

Until the situation is fixed permanently, a simple solution might be to hand water these dry spots or to add some supplemental water to the area with an old fashioned sprinkler on a hose. But the solution is not to apply more and more water to the whole lawn when just a small portion needs it.

Questions from Readers April 25.

Question:

 

What are the big, rounded shrubs with grey-green leaves I am seeing all over the area at this time of year. They bloom with tall cone shaped spikes of blue-lavender flowers. They are quite striking.

Vicky, Newport Beach

Answer:

You are describing a large shrubby plant called Pride of Madeira (Echium candicans). This is an easy plant to grow, very architectural and very handsome when used properly and given plenty of room. Pride of Madeira is a large plant and cannot be pruned to keep it in a small space. It is ideal for hillsides or for coastal bluffs where it can grow unobstructed and show off its architecture. It is native to a small group of islands off the west coast of far northern Africa, a climate very similar to ours in Orange County. rvanderhoff.jpgRon Vanderhoff is the Nursery Manager at Roger’s Gardens, Corona del Mar and his profile can be seen on the Mulch


Featured Plant Care

Hollyleaf Cherry Monthly Plant Care - Photo courtesy Wikipedia Commons

Cherry - Hollyleaf (Prunus ilicifolia) - Monthly Plant Care Calendar

in Shrubs
You can have these monthly Plant Care Reminders sent directly to you each month!
Blue Bunny Hydrangea monthly plant care

Hydrangea - Blue Bunny (Hydrangea involucrata 'Wim Rutten' ) - Monthly Plant Care Calendar

in Shrubs
You can have these monthly Plant Care Reminders sent directly to you each month!
Early Purple Sprouting Broccoli

Broccoli - Early Purple Sprouting (Brassica oleracea 'Early Purple Sprouting') - Monthly Plant Care Calendar

in Edibles
You can have these monthly Plant Care Reminders sent directly to you each month!
Asian Pear Monthly Plant Care

Pear - Asian (Pyrus pyrifolia) - Monthly Plant Care Calendar

in Edibles
You can have these monthly Plant Care Reminders sent directly to you each month!

Latest Articles

Edit Your Tagged Photos!

How to Edit or Remove A Plant "Tag" In Your Garden Photos

Instead of 'Tagging' your friends on Facebook, now you can 'Tag' your Plants in your…
Seed Starting

10 Easy Cut Flowers to Direct Sow

in Seeds
A cut-flower garden or "cutting garden" allows you to bring the beauty of your garden…

Popular Articles

Baseball Field Maintenance

Baseball Field Maintenance - A General Guide for Fields of All Levels

in Lawn
More great baseball field resources can be found here (including a pdf version of this…
Queen Palm Care & Use

The Queen Palm (Syagrus romanzoffiana) Care & Use

in Trees
Jungle Music Palms and Cycads is a family owned and operated business established in 1977
Microgreens

What are Microgreens and How to Grow Them

in Edibles
Microgreens are tiny leafed vegetables that are grown from seed and require very little…
Kahili Ginger Plant Care

Hedychium gardnerianum (Kahili Ginger) - Monthly Plant Care Calendar

You can have these monthly Plant Care Reminders sent directly to you each month!

User Guides (Slide)

Popular Recommendations (Slide)