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Utah Community Learning

Reading your yard: sun, shade, and the west wall that bakes everything

About 18 minutes

Reading Your Yard: Sun, Shade, and the West Wall That Bakes Everything

Okay. Before you buy a single plant, you need to actually walk your yard and pay attention to it. Not the yard you remember from spring. The yard as it exists right now.

Most people skip this step because it feels like homework instead of gardening. Honestly, it's the most important thing we do in this whole course. You can have the fanciest drought-tolerant plant list in the world and still kill everything if you stick a shade-lover on your west wall in July.

Walk it at three different times

Here's the actual assignment. Pick a Saturday. Look at your yard at 9 AM, 1 PM, and 6 PM. Write down, or just remember if you're not a note person, which spots are getting hit with direct sun and which ones are shaded by the house, a fence, a tree, whatever.

Most people think they know their yard's sun pattern and they're wrong about at least one spot. Every single class I've taught, somebody says "oh, I didn't realize that corner gets sun all afternoon." That corner is usually where they killed something.

The west wall problem

Here's the thing about west-facing walls, and this matters a LOT here in Utah County. A west wall doesn't just get sun. It gets sun AND it holds heat from the brick or the stucco and radiates it back out after the sun's already down. So a plant against a west wall isn't living in "full sun," it's living in something closer to full sun plus an oven that stays warm into the evening.

Combine that with our dry air and elevation, and a west wall bed can run genuinely hotter than anywhere else in your yard. I've got a strip along my own west wall that I finally stopped fighting. Nothing wants to live there except the toughest stuff — sedum, some of the tougher yarrows, ice plant if you can find it. Anything that wants "part shade" or "afternoon shade" is going to suffer there no matter what the tag says.

So when you're walking your yard, flag your west-facing beds specifically. Note them as their own category. They're not just "sun." They're something hotter than sun.

Where people get in trouble

This is where I want to bring up the soil thing, because it connects. My first winter here I lost a whole planting of blanketflower — not from the sun, from the soil. I'd amended a bed with good stuff from Macey's, bagged compost, the works, because that's what you do for a vegetable garden and I didn't know better yet. Turns out blanketflower and a lot of these xeric plants actually want the lousy native dirt. Rich soil made them soft and then they didn't handle winter wet the way they were built to. Humbling.

So as you're reading your yard, don't just read the sun. Read the dirt too. Is it the compacted clay that's been there since the house was built? Is it a spot where a previous owner dumped topsoil? Different plants want different starting conditions, and "good soil" isn't automatically good for a plant that evolved in bad soil.

A few practical things to check while you're out there

  • Reflected heat, not just direct sun. Light-colored fences, driveways, and rock mulch bounce heat onto nearby plants. A bed next to a concrete walk runs hotter than the same bed next to grass.
  • Wind. We get it up the canyon and it dries plants out fast, on top of everything else. Note if a spot is exposed or protected.
  • Drainage. After you water or after a good rain, does a spot puddle, or does it disappear right away? Low spots that stay wet are actually the enemy of most drought-tolerant plants, more than the dry spots are.
  • What's already surviving there without help. If something's thriving in a corner that nobody waters, pay attention. That's your yard telling you something true.

My opinion, since you're stuck with it

I will say this every chance I get: overwatering kills more of these plants than drought does. People see a struggling plant and their instinct is to give it more water, more often, and that's usually the wrong move once a plant is established. New plants need real water to get established, then you have to actually back off, and that's the hard part for most people. Keep that in your back pocket as you're reading your yard, because in a minute you're going to want to plant something in every spot you find, and water discipline is going to matter more than the plant list.

Before next time

Walk your own yard at those three times and sketch a rough map, even a bad one on the back of an envelope, marking full sun, part sun, shade, and anywhere you'd call "west wall hot." Bring it next time. We'll start matching plants to what you actually found, not what you wish you had.

Reading your yard: sun, shade, and the west wall that bakes everything · Drought Tolerant Plant Selection · Utah Community Learning